*Pages 1--38 from  Microsoft Word - 9803.doc*
 Version  1.29  D-  1  April  21,  2000
 METHODS  FOR  PREDICTING  INTERFERENCE  FROM  RESPONSE  STATION
 TRANSMITTERS  AND  TO  RESPONSE  STATION  HUBS  AND  FOR  SUPPLYING
 DATA  ON  RESPONSE  STATION  SYSTEMS.  MM  DOCKET  97-  217
 1.  This  document  sets  out  the  methodology  to  be  used  in  carrying  out  certain  requirements  with
 respect  to  response  stations  used  as  part  of  two-  way  cellularized  MDS  and  ITFS  systems.  It
 details  the  methods  for  conducting  interference  studies  from  and  to  two-  way  systems,  and  it
 defines  a  file  format  to  be  used  in  submitting  data  in  response  station  hub  applications.  It  also
 describes  the  propagation  analysis  techniques  to  be  used  in  these  studies.
 Four  Major  Steps  for  Response  Station  Interference  Analysis
 2.  In  carrying  out  the  studies  of  interference  from  response  station  transmitters,  the  aggregate
 power  of  the  interfering  signals  to  be  expected  from  the  response  station  transmitters  shall  be
 determined  using  a  process  comprising  four  major  steps,  as  described  below.  First,  a  grid  of
 points  shall  be  defined  that  is  statistically  representative  of  the  distribution  of  transmitters  to  be
 expected  within  the  response  service  area,  and  the  elevations  to  be  associated  with  each  of  them
 shall  be  determined.  Second,  any  regions  and  any  classes  of  response  stations  to  be  used  shall  be
 defined.  Third,  the  appropriate  transmitter  configuration  to  be  used  in  each  interference  study
 shall  be  determined.  Fourth,  the  equivalent  power  of  each  of  the  representative  transmitters  shall
 be  determined  and  used  in  the  various  required  interference  studies.  The  parameters  used  in  the
 studies  shall  be  provided  in  a  prescribed  electronic  form  as  described  later  in  this  document.
 Defining  Grid  of  Points  for  Analysis
 3.  Since  it  is  impossible  to  know  a  priori  where  response  stations  will  be  located,  a  grid  of  points
 is  used  to  represent  statistically,  in  a  relatively  small  number  of  locations,  the  potentially  much
 larger  number  of  response  stations  that  are  likely  to  be  installed  in  the  areas  surrounding  each  of
 the  points.  Once  defined,  the  same  grid  of  points  shall  be  used  by  all  parties  conducting
 interference  analyses  involving  the  subject  response  station  system.
 4.  Defining  the  representative  grid  of  points  to  use  in  all  the  interference  studies  required  in  Rule
 Sections  21.909  and  74.939  begins  by  geographically  defining  the  response  service  area  (RSA)  of
 the  response  station  hub  (RSH).  This  may  be  done  using  either  a  list  of  coordinates  or  a  radius
 from  the  response  station  hub  location  or  from  the  RSA  reference  point  defined  below  when  the
 hub  is  located  outside  the  RSA.  When  coordinates  are  used,  straight  lines  shall  interconnect  one
 location  with  the  next  in  the  order  given  in  the  list,  and  the  last  location  described  shall  be
 connected  to  the  first  location  by  a  straight  line.  When  a  radius  from  the  response  station  hub
 location  or  the  RSA  reference  point  is  used,  the  value  shall  be  expressed  in  kilometers,  with  any
 fractional  part  expressed  as  a  decimal  value  to  two  places.  The  boundaries  described  are
 administrative  and  serve  to  circumscribe  the  area  in  which  response  station  transmitters  may  be
 located.  When  the  response  station  hub  is  located  outside  the  RSA,  the  reference  point  shall  be
 that  point,  measured  in  degrees,  minutes,  and  seconds  to  the  nearest  one-  tenth,  that  is
 simultaneously  midway  between  the  eastern-  and  western-  most  extremes  and  midway  between  the
 northern-  and  southern-  most  extremes  of  the  RSA.  The  same  method  for  determining  the
 reference  point  shall  be  used  regardless  of  whether  the  RSA  is  defined  as  a  radius  or  as  a  group  of
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 points.  It  should  be  noted  that,  when  the  response  station  hub  is  located  outside  the  RSA  and
 depending  upon  the  shape  of  the  RSA,  the  reference  point  also  might  fall  outside  the  RSA  using
 this  method.  The  same  consideration  applies  to  Basic  Trading  Area  and  Partitioned  Service  Area
 reference  points  as  defined  later.
 5.  The  characteristics  of  any  sectors  in  the  RSH  receiving  antenna  also  must  be  described  in  two
 ways:  geographically,  so  as  to  limit  the  locations  from  which  response  stations  will  transmit  to
 each  sector,  and  electrically,  by  providing  data  on  the  electrical  field  response  of  the  antenna
 pattern  in  each  sector.  Sectors  may  overlap  one  another  geographically.  The  geographic
 boundaries  of  a  sector  shall  be  defined  using  either  a  list  of  coordinates  or  a  list  of  bearings.
 Electrical  field  response  data  shall  be  relative  to  the  direction  of  maximum  response  of  the  sector
 antenna  and  shall  be  provided  every  one  (1)  degree  completely  around  the  antenna.  Both  azimuth
 and  elevation  field  patterns  shall  be  supplied  for  each  polarization  to  be  used  with  a  given  antenna
 type.  The  geographic  orientation  of  each  sector  to  the  nearest  one-  tenth  degree  and  the
 polarization  in  each  sector  also  shall  be  specified.  When  response  stations  share  channels  or  sub-channels
 by  transmitting  simultaneously  on  them,  the  maximum  number  of  response  stations  that
 will  be  permitted  to  transmit  simultaneously  within  each  sector  must  be  specified.
 6.  The  RSA  may  be  subdivided  into  regions  to  allow  different  characteristics  to  be  used  for
 response  stations  in  different  portions  of  the  RSA.  (For  details  on  regions  and  their  use,  see  the
 section  below  on  Defining  Regions  and  Classes  for  Analysis.)  Any  regions  to  be  used  when
 analyzing  interference  must  also  be  described  in  a  manner  similar  to  that  used  to  describe  the  RSA
 itself.  Analysis  of  the  regions  involves  use  of  one  or  more  classes  of  response  station
 characteristics.  For  each  such  class,  a  combination  must  be  specified  of  the  maximum  antenna
 height,  the  maximum  equivalent  isotropic  radiated  power  (EIRP),  and  the  worst  case  antenna
 pattern  that  will  be  used  in  practice  in  installations  of  response  stations  associated  with  that  class
 within  the  respective  regions.  (For  details  on  classes  and  their  use,  see  the  section  below  on
 Defining  Regions  and  Classes  for  Analysis.)  When  response  stations  share  channels  or  sub-channels
 by  transmitting  simultaneously  on  them,  the  maximum  number  of  response  stations
 associated  with  each  class  that  will  be  permitted  to  transmit  simultaneously  within  each  region  and
 each  sector  must  be  specified.
 7.  To  define  the  grid  of  points,  a  line  is  first  established  surrounding  the  RSA,  0.8  km  outside  the
 RSA  boundary  line.  This  is  termed  the  analysis  line  and  will  be  used  in  determining  that  an
 adequate  number  of  grid  points  representing  transmitters  is  being  used  in  the  interference
 analyses.  A  starting  point  is  defined  at  the  northernmost  point  on  the  analysis  line  having  the
 same  longitude  as  the  reference  point,  no  matter  whether  that  reference  point  is  within  or  outside
 the  RSA.  A  series  of  analysis  points  is  then  spaced  along  the  analysis  line  with  the  starting  point
 being  one  of  those  points.  The  analysis  points  must  occur  with  a  spacing  no  greater  than  every
 0.8  km  along  the  analysis  line  or  every  5  degrees  (as  seen  from  the  response  station  hub  or  RSA
 reference  point),  whichever  yields  the  largest  number  of  analysis  points.  When  an  RSA  has  a  non-circular
 shape,  the  choice  of  distance  along  the  analysis  line  or  angle  from  the  response  station  hub
 or  RSA  reference  point  must  be  made  for  each  portion  of  the  line  so  as  to  maximize  the  number  of
 analysis  points  in  that  portion.  The  analysis  points  are  to  be  described  by  their  geographic
 coordinates.  (The  results  of  this  method  are  that,  for  a  circular  RSA,  a  minimum  of  72  analysis
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 points  will  be  used,  and  that,  for  portions  of  the  analysis  line  of  any  RSA  more  than  9.  22  km  from
 the  response  station  hub  or  RSA  reference  point,  the  distance  method  will  be  used.)
 8.  Next,  the  grid  of  points  is  defined  within  the  RSA  to  statistically  represent  the  response
 stations.  The  grid  uses  uniform,  square  spacing  of  the  points,  as  measured  in  integer  seconds  of
 latitude  and  longitude,  with  the  first  square  surrounding  the  RSH  or  RSA  reference  point  and  with
 its  points  equidistant  from  it.  The  lines  connecting  the  points  on  one  side  of  any  grid  square  point
 true  north,  east,  south,  or  west.  The  grid  is  defined  so  as  to  include  all  points  within  or  on  the
 boundary  of  the  RSA,  with  the  exception  described  in  paragraph  9  below.  Note  that  when  the
 RSA  reference  point  is  outside  the  RSA,  it  is  still  the  case  that  only  points  actually  within  the  RSA
 are  to  be  included.  The  result  is  that  the  grid  can  be  defined  by  only  two  values    the
 coordinates  of  the  hub  or  RSA  reference  point  and  the  separation  between  adjacent  grid  points  in
 seconds    combined  with  the  description  of  the  RSA  boundary.
 9.  Any  points  falling  at  locations  within  the  RSA  at  which  it  would  be  physically  impossible  to
 install  a  response  station  (such  as  in  the  middle  of  a  lake,  but  not  the  middle  of  a  forest)  are
 removed  from  the  analysis.  The  points  of  the  grid  so  inactivated  are  to  be  described  by  their
 geographic  coordinates.
 10.  The  grid  of  points  is  then  divided  into  two  groups.  The  division  is  to  be  done  using  a
 checkerboard  pattern  so  that  alternating  points  along  the  east-  west  and  north-  south  axes  belong  to
 opposite  groups  and  points  along  any  diagonal  line  belong  to  the  same  group.
 11.  The  combination  of  the  grid  of  points  within  the  RSA  and  the  points  on  the  analysis  line  is
 next  used  to  determine  that  the  number  of  grid  points  is  truly  representative  of  a  uniform
 distribution  of  response  station  transmitters  within  the  RSA.  This  is  done  by  conducting  a  power
 flux  density  analysis  from  each  grid  point  within  the  RSA  to  each  point  on  the  analysis  line.  For
 this  analysis,  a  single  response  station  should  be  assumed  to  be  located  at  each  grid  point,  that
 response  station  having  the  combined  worst  case  antenna  pattern  without  regard  to  polarization  of
 all  response  station  classes  assigned  to  that  grid  point  and  the  maximum  EIRP  of  any  response
 station  class  assigned  to  that  grid  point.  (For  details  on  the  method  for  determining  the  combined
 worst  case  antenna  pattern,  see  the  section  below  on  Defining  Regions  and  Classes  for  Analysis.)
 The  response  station  antennas  all  should  be  oriented  toward  the  response  station  hub.
 12.  The  analysis  of  grid  point  adequacy  should  be  done  using  free  space  path  loss  over  flat  earth
 only  and  should  not  include  the  effects  of  terrain  in  the  calculation  of  received  signal  levels.  At
 each  point  on  the  analysis  line,  the  power  flux  density  from  all  grid  points  in  each  group  of  the
 checkerboard  pattern  should  be  aggregated.  This  is  done  by  converting  power  received  from  each
 assumed  transmitter  from  dBW/  m  2  to  W/  m  2  ,  summing  the  power  in  W/  m  2  from  all  transmitters  in
 each  group,  and  then  converting  the  sum  back  to  dBW/  m  2  .
 13.  After  the  aggregated  power  flux  density  from  each  of  the  two  groups  has  been  calculated,  the
 received  power  flux  densities  from  the  two  groups  are  compared  at  each  of  the  points  on  the
 analysis  line.  The  power  flux  densities  from  the  two  groups  must  be  within  3  dB  of  one  another  at
 each  of  the  points  on  the  analysis  line.  In  addition,  there  must  be  no  closer  spacing  of  grid  points
 that  allows  a  difference  of  greater  than  3  dB  between  the  groups.  If  the  power  flux  densities  of
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 both  groups  are  within  3  dB  at  every  analysis  point,  a  sufficient  number  of  grid  points  is  included
 for  use  in  further  analyses.  If  they  are  not  within  3  dB  at  every  analysis  point,  a  larger  number  of
 grid  points  (i.  e.,  closer  spacing  of  grid  points)  must  be  used  so  that  the  3  dB  criterion  is  met.  If
 calculation  of  the  spacing  of  grid  points  proceeds  from  larger  to  smaller  spacings,  the  minimum
 spacing  that  should  need  to  be  investigated  to  check  for  smaller  spacings  not  meeting  the  3  dB
 criterion  is  50  percent  of  the  spacing  at  which  the  3  dB  criterion  is  first  met.
 14.  In  cases  in  which  sectorized  response  station  hubs  are  used,  a  further  test  is  required  to  assure
 that  an  adequate  number  of  grid  points  is  used.  In  addition  to  meeting  the  requirements  of  the
 preceding  paragraph,  each  sector  must  contain  a  minimum  number  of  grid  points.  When  the  hub
 is  within  the  RSA,  the  number  of  grid  points  within  each  sector  shall  be  equal  to  or  greater  than
 the  distance  from  the  hub  to  the  furthest  point  in  the  sector,  expressed  in  kilometers,  divided  by
 three.  When  the  hub  is  not  within  the  RSA,  the  number  of  grid  points  within  each  sector  shall  be
 equal  to  or  greater  than  the  difference  between  the  distances  from  the  hub  to  the  nearest  point  and
 to  the  furthest  point  in  the  sector,  expressed  in  kilometers,  divided  by  three.  In  both  cases,  there
 shall  be  a  minimum  of  five  active  grid  points  per  sector,  and  rounding  shall  always  be  to  the  next
 higher  integer.  Should  an  insufficient  number  of  grid  points  fall  within  any  sector  after  meeting  the
 3  dB  criterion,  the  point  spacing  for  the  entire  RSA  must  be  decreased  until  this  additional
 requirement  is  satisfied.
 15.  Once  the  geographic  locations  of  the  grid  points  are  determined,  the  elevations  to  be
 attributed  to  each  must  be  decided.  This  is  done  by  creating  a  geographic  square  uniformly
 spaced  around  each  grid  point  having  a  width  and  a  height  equal  to  the  spacing  between  grid
 points  and  oriented  in  the  same  directions  as  the  lines  between  grid  points  used  to  lay  out  the  grid
 structure.  Each  such  square  is  then  examined  with  respect  to  all  of  the  data  points  of  the  U.  S.
 Geological  Survey  (USGS)  3-  second  database  falling  within  or  on  the  edge  of  the  square  to  find
 the  elevation  of  the  highest  such  data  point,  expressed  in  meters.  That  elevation  is  ascribed  to  the
 associated  grid  point  and  shall  be  used  for  the  elevation  of  that  grid  point  in  all  further  and  future
 analyses  of  the  response  station  system.
 16.  The  geographic  coordinate  system  used  in  the  USGS  3-  second  database  is  based  on  the  World
 Geodetic  System  1972  (WGS-  72)  ellipsoid  and  the  corresponding1983  North  American  Datum
 (NAD-  83).  All  coordinates  used  in  carrying  out  the  analyses  required  in  this  methodology,
 appearing  in  applications  for  response  station  hubs,  and  reported  in  the  files  required  to  be
 submitted  or  served  in  conjunction  with  such  applications  shall  be  based  upon  use  of  NAD-  83.  It
 should  be  noted  that  the  Commission  historically  required  use  of  NAD-  27  for  applications  in  the
 MDS  and  ITFS  services  and  that  the  values  in  the  FCCs  database  have  been  based  upon  use  of
 NAD-  27.  As  of  the  opening  of  the  one-  week  filing  window  for  applications  for  response  station
 hub  licenses,  the  Commission  will  accept  only  coordinates  based  upon  use  of  NAD-  83  for
 applications  for  all  classes  of  stations  in  these  services.  Those  following  this  methodology  or
 filing  applications  for  any  other  purpose  in  these  services  are  advised  that  NAD-  27  data  from
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 previously  existing  sources  must  be  converted  to  NAD-  83  in  order  to  carry  out  the  requirements
 specified  herein  and  in  the  related  Rules.  1
 Defining  Regions  and  Classes  for  Analysis
 17.  To  provide  flexibility  in  system  design,  regions  may  optionally  be  created  within  response
 service  areas.  Regions  may  be  of  arbitrary  size,  shape,  and  location.  The  territory  within  a  region
 must  be  contiguous.  Regions  within  a  single  RSA  shall  not  overlap  one  another.  Within  regions,
 response  stations  are  apt  to  be  randomly  distributed  and  for  analysis  purposes  are  to  be  assumed
 to  be  uniformly  distributed.  Except  as  described  in  the  next  paragraphs,  regions  are  to  be  defined
 by  their  boundaries  in  the  same  manner  as  are  response  service  areas.  (For  details  on  describing
 boundaries,  see  the  section  above  on  Defining  Grid  of  Points  for  Analysis.)
 18.  It  is  permissible  to  define  regions  that  are  nested  circular  areas.  In  this  case,  the  innermost
 region  will  truly  be  circular.  The  remaining  regions  will  be  annular  rings  having  an  inner  and  an
 outer  radius.  The  inner  radius  will  be  the  outer  radius  of  the  region  just  inside  the  particular
 region.  The  outer  radius  will  be  that  specified  in  the  File  Format  for  the  region  under
 consideration.  Nested  regions  will  be  determined  by  their  having  identical  center  points.  Circular
 regions  can  be  specified  that  fall  within  other  regions  and  subtract  from  them  but  that  do  not  share
 a  common  center  point;  in  these  situations,  the  non-  circular  geographic  boundary  definitions
 method  must  be  used,  as  discussed  in  the  next  paragraph.
 19.  It  is  also  permissible  to  define  regions  that  are  nested  non-  circular  areas.  In  this  case,  one
 region  must  be  completely  contained  within  another.  The  normal  procedure  for  defining  each
 region  using  pairs  of  coordinates  shall  be  followed.  Grid  points  that  are  within  the  inner  region
 shall  be  ascribed  to  it,  while  grid  points  outside  the  inner  region  shall  be  ascribed  to  the  outer
 region.  It  is  permissible  to  define  multiple  inner  regions  that  either  are  nested  within  one  another
 or  that  are  separate  from  one  another.  Nested  regions  must  be  completely  contained  within  the
 next  outer  regions;  separate  regions  may  touch  one  another  but  may  not  overlap.
 20.  It  is  further  permissible  to  define  regions  that,  in  total,  do  not  completely  cover  the  area  of  the
 associated  RSA.  The  regions  involved  in  this  situation  can  be  either  circular  or  non-  circular.  Any
 portion  of  the  RSA  not  covered  by  a  defined  region  shall  be  ascribed  to  Region  00,  and  at  least
 one  class  of  station  also  shall  be  assigned  to  Region  00  if  it  exists.  Thus  grid  points  that  fall
 between  non-  concentric  circular  regions,  that  fall  between  defined  non-  circular  regions,  or  that  fall
 outside  the  largest  of  a  concentric  group  of  regions  would  all  be  ascribed  to  Region  00.  Region
 00  would  then  be  treated  in  the  same  fashion  as  any  other  region  insofar  as  the  association  of
 classes  of  stations,  the  definition  of  grid  points,  and  the  like.
 1  Conversion  from  NAD-  27  to  NAD-  83  shall  be  done  using  the  algorithm  incorporated  in  the  NADCON  software,
 version  2.1  or  later,  as  specified  in  the  Federal  Register  for  August  10,  1990,  Volume  55,  Number  155,  page
 32681,  and  available  formatted  for  IBM  PC-  compatible  computers  from  the  National  Oceanic  and  Atmospheric
 Administration  at:  NOAA,  NGS,  N/  NGS12,  1315  East  West  Highway,  Station  9202,  Silver  Spring,  MD  20910-
 3282,  phone  number  (800)  638-  8972.
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 21.  Within  each  region,  at  least  one  class  of  response  station  with  defined  characteristics  must  be
 specified  to  match  the  interference  predicted  to  be  caused  with  the  types  of  installations  to  be
 made.  The  classes  are  to  be  used  in  interference  analyses  and  to  provide  limitations  on  the
 installations  that  may  be  made  in  the  related  region.  The  characteristics  of  each  such  class  of
 response  stations  shall  include  the  maximum  height  above  ground  level  (AGL)  for  antennas,  the
 maximum  equivalent  isotropic  radiated  power  (EIRP),  and  the  combined  worst-  case  antenna
 radiation  pattern    for  each  polarization  when  both  are  used    for  all  response  stations  of  that
 class  to  be  installed.  When  response  stations  share  a  channel  by  transmitting  simultaneously  (see
 section  below  on  Determining  Transmitter  Configuration),  for  each  class  of  response  stations
 within  each  region,  the  maximum  number  of  such  response  stations  that  may  transmit
 simultaneously  on  any  channel  or  sub-  channel  shall  be  specified.
 22.  Specification  of  the  maximum  number  of  simultaneously  transmitting  response  station
 transmitters  shall  be  on  a  power  spectral  density  basis.  The  number  to  be  specified  is  the  number
 of  transmitters  that  may  simultaneously  operate  within  any  portion  of  the  channel,  no  matter  how
 finely  divided.  The  maximum  EIRP  that  may  be  emitted  by  any  individual  response  station  must
 be  limited  proportionately  to  the  fraction  of  the  channel  that  the  response  station  occupies,
 resulting  in  a  maximum  radiated  power  spectral  density  (as  expressed  in  dBm/  m  2  /Hz)  that  is
 constant  across  the  channel.  The  total  number  of  individual  response  stations  that  may  operate
 within  a  licensed  channel  at  any  one  instant  will  depend  upon  the  subchannelization  scheme  used.
 For  example,  if  an  entire  6  MHz  channel  is  dedicated  to  response  station  operation  and  if  the
 maximum  number  of  simultaneously  transmitting  stations  within  a  response  station  hub  antenna
 sector  is  specified  as  50,  then  50  response  stations  could  all  occupy  the  entire  channel  at  the
 specified  maximum  EIRP.  On  the  other  hand,  if  the  6  MHz  channel  were  divided  into  ten  sub-channels
 of  600  kHz  each,  then  each  sub-  channel  could  support  50  response  stations,  for  a  total
 of  500,  each  transmitting  with  a  maximum  of  one-  tenth  the  specified  maximum  EIRP.  Carrying
 the  example  one  step  further,  the  same  6  MHz  channel  could  simultaneously  support  10  response
 stations  using  the  entire  channel  width  and  full  specified  EIRP  and  also  40  response  stations  on
 each  of  10  sub-  channels,  totaling  400,  each  transmitting  with  one-  tenth  the  specified  maximum
 EIRP,  for  a  grand  total  of  410  simultaneously  operating  response  stations.  The  subchannelization
 scheme  may  be  changed  without  notice  to  the  Commission  or  to  other  licensees  so  long  as  values,
 i.  e.,  actual  and  equivalent,  specified  for  the  total  number  of  stations  and  the  radiated  power
 spectral  density  (in  dBm/  m  2  /Hz)  are  not  exceeded  at  any  time  for  any  portion  of  the  channel.
 23.  The  combined  worst-  case  antenna  azimuth  radiation  pattern  is  required  to  be  specified
 collectively  for  all  of  the  classes  of  response  stations  located  at  each  grid  point  (in  the  procedure
 above,  in  the  section  on  Defining  Grid  of  Points  for  Analysis,  for  confirming  that  the  required
 number  of  grid  points  is  specified)  and  individually  for  each  of  the  classes  defined  for  each  region
 of  the  RSA.  In  the  case  of  the  collective  pattern  used  to  determine  adequacy  of  the  number  of
 grid  points,  if  both  polarizations  are  used  in  the  system,  the  horizontally-  and  vertically-  polarized
 azimuth  patterns  of  each  antenna  should  be  treated  as  deriving  from  separate  antennas  and  should
 be  combined  with  one  another  and  with  the  patterns  from  all  the  other  antennas  at  that  grid  point.
 In  the  cases  of  the  individual  patterns  for  each  class  used  for  interference  analyses,  if  both
 polarizations  are  used  in  the  system,  the  horizontally-  and  vertically-  polarized  combined  worst-case
 azimuth  patterns  should  be  determined  separately  for  all  classes  defined.  Similarly,  the  cross-polarized
 worst-  case  patterns  should  be  determined  for  each  polarization.
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 24.  These  combined  worst-  case  patterns  are  derived  by  setting  the  maximum  forward  signal
 power  of  all  antenna  types  to  be  used  within  the  class  or  classes  to  the  same  value  and  then  using
 the  highest  level  of  radiation  in  each  direction  from  any  of  the  antennas  as  the  value  in  that
 direction  for  the  combined  antenna  pattern.  The  same  method  is  used  to  determine  both  plane-and
 cross-  polarized  patterns,  which  are  used  separately  in  interference  analyses.  The  combined
 worst-  case  plane-  and  cross-  polarized  patterns  for  each  class  will  be  used  in  all  of  the  interference
 studies  and  are  not  to  be  exceeded  in  actual  installations  of  response  stations  within  a  class  to
 which  the  pattern  applies.
 Determining  System  Configuration
 25.  Several  factors  in  the  configuration  of  a  system  determine  whether  or  not  transmitters  located
 at  specific  grid  points  could  cause  interference  to  particular  neighboring  systems.  In  order  to
 simplify  the  study  of  interference  to  those  neighbors,  the  system  configuration  is  taken  into
 account  so  as  to  reduce  the  number  of  calculations  required  by  eliminating  the  study  of
 interference  from  specific  grid  points  when  possible.  The  main  factor  that  determines  whether  to
 eliminate  certain  grid  points  from  consideration  is  terrain  blockage.
 26.  When  grid  points  are  completely  blocked  from  line-  of-  sight  to  all  of  a  neighboring  system,
 they  can  be  eliminated  from  the  aggregation  of  power  used  in  calculating  interference  to  that
 system.  To  determine  whether  to  eliminate  a  grid  point  for  this  reason,  a  shadow  study  can  be
 conducted  from  each  grid  point  in  the  direction  of  the  neighboring  system.  Separate  studies  can
 be  conducted  for  classes  of  response  stations  that  have  different  maximum  heights  above  ground.
 If  there  is  no  area  within  the  protected  service  area  and  no  registered  receiving  location  of  the
 neighboring  system  to  which  a  particular  class  of  station  at  a  grid  point  has  line-  of-  sight,  it  can  be
 eliminated  from  the  calculations  that  determine  the  power  of  interfering  signals  at  the  neighbors
 location.  Alternatively,  lack  of  line-  of-  sight  can  be  evaluated  from  each  class  at  each  grid  point  to
 each  location  analyzed  within  the  neighboring  system  (see  section  below  on  Calculating
 Aggregated  Power  from  Transmitters),  and  grid  points  can  be  eliminated  on  a  location-  by-location
 basis,  if  that  process  is  more  easily  implemented.  (It  should  be  noted  that  elimination
 from  analysis  of  grid  points  not  having  line-  of-  sight  effectively  also  eliminates  activation  for
 undesired  response  station  signals  of  the  non-  line-  of-  sight  [NLOS]  mode  by  the  propagation
 model  defined  later.  The  NLOS  mode  can  still  be  activated  for  desired  signals  by  the  model  in  the
 various  required  analyses  of  interference  to  neighboring  systems.)
 27.  There  are  two  ways  in  which  a  large  number  of  response  stations  can  share  channels:  They  can
 take  turns  using  the  channels  so  that  only  one  transmitter  will  be  turned  on  at  any  particular
 instant  on  each  channel  or  sub-  channel  being  received  by  a  separate  receiver  in  the  system
 (commonly  called  TDMA),  or  they  can  transmit  at  the  same  time  and  use  special  filtering
 techniques  at  the  receiver  to  separate  the  signals  they  are  sending  simultaneously  to  that  receiver
 (commonly  called  CDMA).  These  two  cases  will  result  in  different  levels  of  power  being  radiated
 into  neighboring  systems,  and  therefore  they  must  be  analyzed  slightly  differently.
 28.  In  the  case  of  response  stations  that  take  turns  using  a  channel  or  sub-  channel,  the  grid  point
 and  class  of  station  that  produces  the  worst  case  of  interference  to  each  analyzed  location  in  the
 neighboring  system  must  be  determined  for  each  group  of  response  stations  that  share  a  channel
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 (e.  g.,  within  a  response  station  hub  receiving  antenna  sector).  In  this  case,  the  interfering  signal
 source  can  be  treated  as  a  single  transmitter  occupying  the  full  bandwidth  of  the  channel  or  sub-channels
 used  from  that  location  and  having  a  power  level  equal  to  the  aggregate  of  the  power
 transmitted  on  all  of  the  sub-  channels,  if  sub-  channels  are  used.
 29.  In  the  case  of  response  stations  that  simultaneously  share  a  channel  or  sub-  channel,  the  grid
 point  and  class  of  station  that  produces  the  worst  case  of  interference  to  each  analyzed  location  in
 the  neighboring  system  must  be  determined  for  each  group  of  response  stations  that  share  a
 channel  (e.  g.,  within  a  response  station  hub  receiving  antenna  sector).  In  this  case,  the  interfering
 signal  source  can  be  treated  as  a  single  grid  point  at  which  are  located  all  of  the  simultaneously
 transmitting  transmitters,  occupying  the  full  bandwidth  of  the  channel  or  sub-  channels  used  from
 that  location,  and  having  a  power  level  equal  to  the  aggregate  of  the  power  transmitted  by  all  of
 the  response  stations  transmitting  simultaneously  on  all  of  the  sub-  channels,  if  sub-  channels  are
 used.
 30.  In  cases  of  shared-  channel  operation  in  which  the  number  of  simultaneously  transmitting
 response  stations  of  a  class  is  limited  by  a  region  that  crosses  sector  boundaries,  the  number  of
 such  response  stations  considered  within  some  sectors  may  be  limited  so  that  the  total  included  in
 the  analysis  in  all  sectors  does  not  exceed  the  total  permitted  for  the  region.  The  objective  in
 analyzing  these  cases  is  to  find  the  worst  case  situation  with  regard  to  the  maximum  number  of
 simultaneously  transmitting  transmitters,  assigning  them  collectively  to  the  locations  at  which  they
 cause  the  most  interference  to  each  location  analyzed  within  neighboring  systems,  while
 respecting  the  limits  imposed  on  the  number  of  such  transmitters  by  sector  and  by  region.  A
 statement  describing  in  detail  the  process  or  algorithm  followed  in  selecting  the  number  and
 classes  of  response  stations  analyzed  at  each  grid  point  shall  be  appended  to  the  application  and
 distributed  as  a  standard  ASCII  text  file  along  with  the  data  file  described  below  in  the  section  on
 the  File  Format.
 31.  An  example  of  the  case  just  described  of  shared-  channel  operation  with  the  number  of
 simultaneously  transmitting  transmitters  limited  both  by  region  and  by  sector  is  one  in  which  a
 region  comprises  an  annular  ring  that  stretches  from  half  the  radius  to  the  full  radius  of  a  circular
 RSA.  The  region  has  a  limit  of  200  simultaneously  transmitting  transmitters  of  a  particular  class,
 and  each  of  20  sectors  is  limited  to  20  simultaneously  transmitting  transmitters.  If  the  worst  case
 interference  from  each  sector  were  caused  by  the  subject  class  and  all  were  used  in  analyzing
 interference  to  a  neighboring  system,  the  result  would  be  the  use  of  400  such  response  stations
 (20  x  20)  in  the  analysis,  while  the  region  is  limited  to  200.  Consequently,  the  10  regions  (10  x  20
 meets  the  limit  of  200)  causing  the  most  interference  to  the  neighbor  would  be  selected,  and,  in
 the  other  10  sectors,  the  classes  of  station  causing  the  second  largest  amount  of  interference  to
 the  neighbor  would  be  selected  for  use  in  the  analysis.  In  choosing  the  secondary  interfering
 response  station  classes,  the  same  type  of  limitations  would  have  to  be  observed.  The  process  for
 making  these  selections  based  on  the  appropriate  limitations  would  have  to  be  followed  for  each
 analyzed  point  in  the  neighboring  system.
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 Calculating  Aggregated  Power  from  Transmitters
 32.  The  final  major  step  in  calculating  interference  from  response  station  transmitters  is  the
 calculation  of  the  equivalent  isotropic  radiated  power  (EIRP)  to  be  attributed  to  each  of  the
 selected  grid  points  in  the  various  interference  studies  so  as  to  be  representative  of  the  number  of
 response  stations  that  are  expected  to  be  in  operation  simultaneously  within  the  RSA.  When
 analyzing  systems  in  which  the  response  stations  take  turns  using  a  channel  or  sub-  channels,  this
 means,  for  each  location  analyzed  in  the  system  to  be  protected,  selecting  the  grid  point  and  class
 of  station  within  each  sector  that  radiates  the  strongest  signal  to  that  location  and  aggregating  the
 power  from  all  such  selected  grid  points  and  classes,  using  the  maximum  EIRP  (for  all  sub-channels
 taken  together),  the  maximum  antenna  height,  and  the  worst  case  antenna  pattern  for  a
 single  station  of  that  class  at  each  selected  grid  point.
 33.  For  systems  in  which  response  stations  simultaneously  share  the  channel  or  sub-  channels  to
 each  receiver  at  each  hub,  substantially  the  same  analysis  is  performed.  The  difference  is  that  the
 maximum  number  of  simultaneously  transmitting  response  stations  within  each  sector  is  placed  at
 each  selected  grid  point,  in  turn.  The  maximum  EIRP  (for  all  sub-  channels  taken  together)  for
 each  regional  class  at  each  grid  point,  expressed  in  dBW,  is  converted  to  Watts.  The  EIRP  is  then
 multiplied  by  the  number  of  simultaneously  transmitting  transmitters  in  the  regional  class  assigned
 to  that  grid  point,  and  the  resulting  EIRP  in  Watts  is  converted  back  to  dBW.  When  the  number
 of  simultaneously  transmitting  transmitters  within  a  sector  in  the  class  and  at  the  grid  point  that
 causes  the  most  signal  to  be  propagated  to  a  location  in  the  neighboring  system  does  not  equal  the
 number  of  simultaneously  transmitting  transmitters  permitted  in  that  sector,  the  grid  point  and
 class  of  station  that  cause  the  next  largest  amount  of  signal  to  be  so  propagated  shall  be  used  to
 account  for  the  remaining  number  of  simultaneously  transmitting  transmitters  permitted  in  the
 sector,  and  so  on  as  necessary.  At  each  location  analyzed  within  the  neighboring  system,  the
 power  received  from  the  selected  grid  points  within  each  sector  is  aggregated  through  conversion
 from  dBW  to  Watts,  addition  of  power  levels,  and  conversion  back  to  dBW.  In  each  case,  the
 values  so  calculated  are  the  aggregated  powers  of  all  the  simultaneously  transmitting  response
 station  transmitters  sharing  the  same  channel(  s)  or  sub-  channel(  s),  from  all  sectors,  for  use  as  the
 undesired  signal  levels  in  interference  analyses.
 34.  In  calculating  the  aggregate  EIRP  or  received  signal  power,  the  interfering  signals  may  be
 treated  as  emanating  from  response  stations  occupying  the  full  channel  and  utilizing  the  maximum
 allowed  EIRP.  In  practice,  as  described  previously  in  the  section  on  Defining  Regions  and
 Classes  for  Analysis,  subchannelization  may  be  used  so  long  as  the  power  spectral  density  limits
 are  respected.  Interference  protection  may  also  be  calculated  using  appropriate  adjustments  to
 the  required  protection  ratios  based  on  the  relative  bandwidths  of  the  desired  and  undesired
 signals.  In  either  case,  the  maximum  number  of  simultaneously  transmitting  response  stations
 shall  be  limited  on  a  power  spectral  density  basis  to  the  number  specified.
 35.  In  a  system  using  both  polarizations,  the  response  stations  represented  by  each  grid  point  are
 to  be  assumed  to  use  the  polarization  of  the  response  station  hub  antenna  sector  in  which  they  are
 located.  The  appropriate  horizontal  or  vertical  combined  worst-  case  antenna  pattern  is  to  be  used
 in  interference  studies  depending  upon  the  polarization  of  the  sector  in  which  each  grid  point  is
 located.  In  a  system  using  only  one  polarization,  the  effect  of  antenna  sectors  can  be  ignored  and
9
 Version  1.29  D-  10  April  21,  2000
 the  choice  between  horizontal  and  vertical  polarization  patterns  made  identically  for  all  grid
 points.
 36.  Finally,  the  aggregate  power  of  each  active  regional  class  at  each  active  grid  point  is  used  in
 conducting  the  required  interference  studies  described  in  the  relevant  Rules.  For  this  purpose,  a
 study  grid  is  established  in  each  neighboring  system  to  be  evaluated.  The  study  grid  is
 constructed  in  a  manner  similar  to  that  for  the  grid  of  points  within  the  RSA.  First,  a  reference
 point  must  be  established  for  the  35-  mile  Protected  Service  Area,  Basic  Trading  Area  (BTA),  or
 Partitioned  Service  Area  to  be  studied.  For  a  35-  mile  Protected  Service  Area,  the  reference  point
 is  either  the  transmitter  location  or  the  pre-  established  FCC  reference  point  if  the  transmitter  has
 been  moved.  For  a  BTA  or  Partitioned  Service  Area,  the  reference  point  is  the  point,  measured  in
 degrees,  minutes,  and  seconds  (to  the  nearest  one-  tenth  second),  that  is  midway  between  the
 eastern-  and  western-  most  extremes  of  the  BTA  and  midway  between  the  northern-  and  southern-most
 extremes  of  the  BTA  or  Partitioned  Service  Area.  (It  should  be  noted  that,  depending  upon
 the  shape  of  the  BTA  or  Partitioned  Service  Area,  the  reference  point  might  fall  outside  the  BTA
 or  Partitioned  Service  Area.)  Next  a  series  of  orthogonal  east-  west  and  north-  south  lines  is
 constructed  having  1.5  km  spacing.  The  lines  surrounding  the  reference  point  shall  be  located
 0.75  km  from  the  reference  point  at  their  nearest  points  to  the  reference  point.  The  east-  west
 lines  shall  be  parallel  to  the  lines  of  latitude.  Where  there  is  an  overlap  between  the  RSA  and  the
 Protected  Service  Area,  BTA,  or  Partitioned  Service  Area  to  be  studied,  additional  lines  may  be
 used,  spaced  equidistant  from  one  another  and  from  the  1.5  km-  spaced  lines  (i.  e.,  lines  with  a
 spacing  in  km  of  0.75,  0.5,  0.375,  0.25,  etc).  The  study  points  shall  be  at  the  intersections  of  the
 orthogonal  line  structure.
 37.  Signals  from  the  potentially  interfering  system  shall  be  evaluated  at  the  study  points.  The
 signal  level  at  each  of  the  study  points  is  calculated  using  the  terrain-  based  propagation  analysis
 tool  specified  below  to  determine  the  signal  level  incident  at  that  point  from  each  regional  class  at
 each  grid  point  within  an  RSA.  The  signals  from  the  potentially  interfering  system  to  be  evaluated
 are  the  aggregate  of  the  signals  from  all  RSAs  within  the  system.  In  addition,  if  the  channels  are
 partially  or  completely  shared  with  primary  or  booster  transmitters,  the  interference  contributions
 of  those  stations  must  be  aggregated  with  those  of  the  response  stations.  Signal  aggregation  is
 performed  by  first  converting  dBW/  m  2  to  W/  m  2  ,  adding  the  power  levels  obtained,  and  converting
 from  W/  m  2  back  to  dBW/  m  2  .  If  the  system  under  study  is  a  35-  mile  Protected  Service  Area,  then
 the  relevant  D/  U  ratios  must  be  obtained  or  the  appropriate  minimum  signal  levels  protected  when
 the  desired  signal  falls  below  a  prescribed  threshold.  (That  threshold  is  described  in  the  next
 paragraph.)  For  a  Protected  Service  Area,  the  directional  characteristics  of  the  FCC  reference
 antenna  are  applied  to  each  of  the  incident  signals  prior  to  aggregation.  If  the  system  under  study
 is  a  BTA  or  Partitioned  Service  Area,  then  the  signal  level  at  all  study  points  within  the  BTA  or
 Partitioned  Service  Area  must  meet  the  73  dBW/  m  2  requirement,  and  the  directional
 characteristics  of  the  FCC  reference  antenna  are  not  applied,  as  the  antenna  characteristics  in  this
 instance  are  irrelevant.
 38.  In  conducting  analyses  of  interference  from  response,  booster,  and/  or  primary  stations
 included  in  two-  way  systems  to  neighboring  35-  mile  Protected  Service  Areas  or  registered  receive
 sites,  neighboring  receivers  shall  be  protected  by  the  appropriate  D/  U  ratio  so  long  as  the  desired
 signal  exceeds  a  defined  signal  level,  but  lower  signal  levels  need  be  protected  only  to  a  minimum
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 Version  1.29  D-  11  April  21,  2000
 level  that  depends  upon  the  frequency  relationship  between  the  signals.  For  co-  channel  desired
 signals  below  45  dB  S/  N,  the  defined  signal  level  shall  be  deemed  protected  when  the  undesired
 signal  is  at  or  below  the  noise  floor  level  for  the  bandwidth  involved,  as  calculated  per  Equation  2
 below.  For  adjacent  channel  desired  signals  below  45  dB  S/  N,  the  defined  signal  level  shall  be
 deemed  protected  when  the  undesired  signal  is  at  or  below  45  dB  above  the  noise  floor.  Thus  for
 a  6  MHz  channel,  the  minimum  co-  channel  undesired  signal  level  that  must  be  maintained  would
 be  -136.2  dBW  or  -106.2  dBm;  the  minimum  adjacent  channel  undesired  signal  level  that  must  be
 maintained  would  be  91.2  dBW  or  61.2  dBm.  These  studies  shall  be  conducted  based
 exclusively  upon  the  levels  of  the  desired  and  undesired  signals  without  consideration  of  the
 receiver  noise  figure.
 39.  Similar  methods  shall  be  used  in  conducting  the  various  desired-  to-  undesired  (D/  U)  signal
 ratio  studies  for  co-  channel  and  adjacent  channel  interference.  2  In  all  of  these  studies,  the  analysis
 shall  use  the  aggregate  power  of  each  regional  class  at  each  grid  point,  the  worst  case  plane-  or
 cross-  polarized  antenna  pattern,  as  appropriate,  for  each  regional  class,  with  the  antennas  at  each
 grid  point  aimed  toward  the  response  station  hub,  and  the  maximum  antenna  height  above  ground
 specified  for  each  regional  class  at  each  grid  point.
 Protection  to  Response  Station  Hubs
 40.  The  applicant  for  a  new  or  modified  main  station,  high-  power  booster  or  response  station  hub
 is  required  to  demonstrate  protection  to  any  previously  proposed  or  licensed  response  station  hub
 within  160.94  km  (100  miles)  of  the  proposed  facilities.  Two  methods  are  available  for
 demonstrating  such  protection.  The  applicant  can  demonstrate  that  the  proposed  facility  will  not
 increase  the  effective  power  flux  density  of  the  undesired  signals  generated  by  the  proposed
 facility  and  any  associated  main  stations,  booster  stations  or  response  stations  at  the  response
 station  hub  antenna  for  any  sector.  Alternatively,  the  applicant  can  demonstrate  that  the  proposed
 facility  will  not  increase  the  noise  floor  at  the  response  station  hub  antenna  for  any  sector  by  more
 than  1  dB  for  co-  channel  signals  and  45  dB  for  adjacent  channel  signals.  The  applicant  can  invoke
 the  alternative  protection  method  only  once  per  response  station  hub  sector.  The  methods  to  be
 used  in  making  such  demonstrations  follow.
 41.  As  is  discussed  in  the  section  below  on  the  File  Format,  an  applicant  for  a  response  station
 hub  will  have  specified  the  geographic  coordinates  of  the  hub  location  and,  for  each  sector,  (1)  the
 height  of  the  antenna  above  ground  level  (AGL)  and  above  mean  sea  level  (AMSL),  (2)  the  hub
 receiving  antenna  pattern  (both  in  azimuth  and  elevation,  both  co-  and  cross-  polarized),  (3)  the
 2  When  dissimilar  bandwidths  are  used  by  the  desired  and  undesired  stations,  methods  for  adjusting  the  required
 D/  U  ratios  are  provided  respectively  in:  21.902(  b)(  7)(  ii)  for  MDS  analysis  of  co-  channel  stations,  21.902(  b)(  7)(  iii)
 for  MDS  analysis  of  adjacent  channel  stations,  74.903(  a)(  6)(  ii)  for  ITFS  analysis  of  co-  channel  stations  and
 74.903(  a)(  6)(  iii)  for  ITFS  analysis  of  adjacent  channel  stations.  Those  rules  are  cross-  referenced  in
 21.909(  d)(  3)(  iv)  and  (v)  and  74.939(  d)(  3)(  iv)  and  (v),  which  discuss  compliance  by  applicants  for  response  station
 hubs  with  the  45  dB  and  0  dB  D/  U  requirements.
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 hub  receiving  antenna  gain  in  the  main  lobe  (in  dBi),  (4)  the  azimuth  of  the  main  lobe,  (5)  any
 mechanical  tilt  utilitized,  (6)  the  direction  of  any  mechanical  tilt  utilized,  and  (7)  the  polarization
 of  the  receiving  antenna.  Those  specified  characteristics  shall  be  utilized  for  purposes  of
 demonstrating  interference  protection  to  the  hub.
 42.  The  level  of  interference  caused  to  a  response  station  hub  by  the  aggregate  power  of  the
 proposed  new  or  modified  MDS  or  ITFS  facility  and  any  associated  main  stations,  booster
 stations,  and  response  stations  shall  be  independently  determined  for  each  sector.  The  resulting
 summation  is  then  used  for  comparisons  between  old  and  new  values  when  the  applicant  is
 attempting  to  demonstrate  that  the  effective  power  flux  density  of  the  undesired  signals  has  not
 increased,  or  for  comparison  against  the  specified  receiver  degradation  threshold  when  the
 applicant  is  attempting  to  demonstrate  that  the  proposed  facility  will  not  increase  the  noise  floor
 by  more  than  the  permissible  amount.
 43.  In  calculating  the  effective  power  flux  density  value,  the  effective  isotropic  radiated  power
 (EIRP)  radiated  in  the  direction  of  the  protected  response  station  hub  from  each  associated  main,
 booster,  and/  or  response  station  (as  represented  by  the  selected  grid  points  described  earlier  in  the
 section  Four  Major  Steps  for  Response  Station  Interference  Analysis)  of  the  applicant  shall  first
 be  determined.  The  power  arriving  at  the  response  station  hub  shall  be  analyzed  using  the
 propagation  analysis  tool  described  in  the  following  section  on  that  subject.  The  propagation
 model  will  select  between  the  line-  of-  sight  (LOS)  and  non-  line-  of-  sight  (NLOS)  modes  described
 later  for  each  interfering  signal  when  making  the  required  analyses.  The  aggregation  of  power
 from  all  related  sources  shall  take  account  of  the  angular  displacement  of  each  particular  source
 from  the  peak  of  the  main  lobe  of  the  receiving  antenna  and  the  relative  polarization  of  each
 interfering  signal  source.
 44.  To  determine  the  effective  power  flux  density,  the  following  formula  shall  be  used:
 PFDEFF
 ISi  G  i  n  REL  
   10  10  10  1  10log  (1)
 Where
 &
 )  /
 )  /
 2
 2
 effects)  polarization  discrimination  antenna  (Includes
 dB)  0  is  which  of  value  the  lobe,  main  of  peak  to  (Relative
 (dB)  Source  ith  of  Direction  in  Sector  Hub  of  Gain  Relative  i  G
 m  (dBW  Source  ith  of  Density  Flux  Power  Signal  Interfering  ISi
 (units)  Sources  Signal  Interfering  of  Number  n
 m  (dBW  Density  Flux  Power  Effective  PFD
 REL
 EFF
 45.  When  the  applicant  is  attempting  to  demonstrate  that  its  proposed  facility  and  all  its  associated
 facilities  will  not  increase  the  effective  power  flux  density  of  the  undesired  signals  at  each
 response  station  hub  sector  antenna,  it  is  necessary  to  ascertain  that  the  predicted  effective  power
 flux  density  from  the  proposed  facility  and  all  associated  facilities  does  not  exceed  the  value
 predicted  from  any  previously  authorized  associated  facilities  at  each  response  station  hub  sector
 antenna.  When  the  applicant  is  attempting  to  demonstrate  that  the  proposed  facility  and  all
 associated  facilities  will  not  impermissibly  increase  the  noise  floor,  an  additional  step  is  required  to
12
 Version  1.29  D-  13  April  21,  2000
 ascertain  that  the  predicted  value  of  the  effective  power  flux  density  does  not  exceed  the  allowed
 threshold  values  for  both  co-  channel  and  adjacent  channel  signals.
 46.  To  calculate  the  relationship  of  the  effective  power  flux  density  to  the  threshold  values  for  co-channel
 and  adjacent  channel  signals,  the  level  of  the  noise  floor  of  the  hub  receiver  first  must  be
 figured.  It  is  given  by  the  formula:
   @  T  P  THERMAL  273BW  10log>k    (2)
 Where      
   Hz  Bandwidth  BW
 Celsius  degrees  Temperature  Noise  T
 Constant  k
 Sources  Thermal  from  Power  Noise  P  THERMAL    23
 1.380662x10  Boltzmann's
 (dBW)
 47.  With  a  typical  noise  temperature  of  17.2  deg.  C  and  a  bandwidth  of  6  MHz,  Equation  2  yields
 a  thermal  noise  power  of  -136.2  dBW.
 48.  Factors  in  the  calculation  of  the  equivalent  power  flux  density  of  the  thermal  noise  power  are
 the  noise  figure  of  the  receiver  input  stage(  s)  and  the  cable  losses  between  antenna  and  receiver
 input.  For  consistency,  the  noise  figure  shall  be  set  at  2.5  dB,  and  the  cable  losses  shall  be  set  at
 1  dB.  The  wavelength  of  the  received  signal  also  becomes  a  factor;  it  shall  be  expressed  in  meters
 and  can  be  taken  as  0.13915  meters  for  the  2.150-  2.162  GHz  band  and  as  0.11538  meters  for  the
 2.5-  2.7  GHz  band.  The  equivalent  total  power  flux  density  of  the  thermal  noise  power  plus  the
 effective  power  flux  density  of  the  interfering  signal(  s)  then  is  given  by:
   
   
 
 
   
   
 
 
 
     
 
     
   
 10
 4  10log
 10  10
 2
 10
 10  10  10log
 S
 O
 ANT  C  THERMAL
 EFF
 G  NF  L  P  PFD
 EQUIV  PFD  (3)
 Where
 )  /  2
 GHz)  2.6  at  m  0.11538  and  2.16  at  m  (0.13915  (m)  Wavelength
 (dBi)  Gain  Antenna  Receiving  G
 dB)  2.5  of  value  a  to  set  (dB,  Figure  Noise  NF
 dB)  1  of  value  a  to  set  (dB,  Losses  Cable  L
 m  (dBW  Density  Flux  Power  Total  Equivalent  PFD
 ANT
 C
 EQUIV
 O
 49.  When  applicants  invoke  the  alternative  hub  protection  method  by  demonstrating  protection  to
 the  noise  floor  of  a  response  station  hub,  compliance  with  the  limits  for  co-  channel  and  adjacent
 channel  interference  from  the  proposed  facilities  to  the  response  station  hub  can  be  determined  by
 first  calculating  the  equivalent  total  power  flux  density  with  the  effective  power  flux  density  of  the
 interference  set  to  zero  and  then  re-  computing  using  the  true  effective  power  flux  density.  (To  be
 mathematically  correct  in  setting  the  interference  value  to  zero,  either  the  first  term  inside  the
 parentheses  in  Equation  3  can  be  set  to  zero,  or  the  PFDEFF  value  can  be  set  to  a  very  low  value
   at  least  30  dB  below  PTHERMAL.)  The  two  values  found  should  not  differ  by  more  than  1  dB  for
 co-  channel  interference  nor  by  more  than  45  dB  for  adjacent  channel  interference.
13
 Version  1.29  D-  14  April  21,  2000
 Propagation  Model
 50.  When  analyzing  interference  from  or  to  any  response,  booster,  or  primary  stations  included  in
 two-  way  systems  to  or  from  other  stations,  the  propagation  model  described  below  shall  be  used,
 taking  into  account  the  effects  of  terrain  and  certain  other  factors.  The  model  is  derived  from
 basic  calculations  described  in  NTIS  Technical  Note  101.  3  It  is  intended  as  a  tool  for  analysis  of
 wide  area  coverage  of  microwave  transmissions,  and  it  is  available  built  into  commercial
 propagation  analysis  software  packages  that  are  widely  used  by  the  MDS/  ITFS  industry  for
 coverage  and  interference  prediction.  4
 51.  In  the  model  described,  two  loss  terms  are  computed    the  free  space  path  loss  based  solely
 on  distance  and  the  excess  path  loss  (XPL)  that  derives  from  terrain  obstacles  and  other  elements
 in  the  environment.  Among  the  inputs  required  for  some  implementations  of  the  model  are
 location  and  time  variability  factors.  Other  factors  for  such  items  as  clutter  and  foliage  losses  can
 be  considered  by  some  software  versions,  but  they  will  not  be  used  in  analyzing  the  systems
 considered  herein.
 52.  The  excess  path  loss  portion  of  the  calculation  considers  several  conditions  that  impact  signal
 propagation.  These  include  whether  the  path  is  line  of  sight  for  the  direct  ray,  whether  there  is
 0.6  first  Fresnel  zone  clearance,  or  whether  the  path  is  totally  obstructed.  When  the  first  Fresnel
 zone  is  partially  obstructed,  an  additional  loss  up  to  6  dB  is  included  by  the  model.  When  the  path
 is  totally  obstructed,  the  path  loss  is  calculated  using  the  Epstein-  Peterson  method  5  that  considers
 the  diffraction  losses  over  successive  terrain  obstacles.  In  this  case,  each  obstacle  is  treated
 separately,  with  the  preceding  obstacle  (or  the  transmitter,  in  the  first  instance)  considered  to  be
 the  transmitter  and  the  succeeding  obstacle  (or  the  receiver,  in  the  last  instance)  considered  to  be
 the  receiver.
 53.  Some  software  implementations  of  the  methods  described  herein  may  provide  for  setting
 parameters  for  both  location  and  time  variability  in  terms  of  the  percentage  of  the  locations  or  of
 the  time  that  signals  meet  or  exceed  studied  levels.  For  purposes  of  analyzing  the  interference
 from  response  stations  and  to  response  station  hubs,  both  the  location  and  the  time  variability
 factors  shall  be  set  to  50  percent  in  all  cases.  When  available  as  a  parameter,  the  confidence  level
 shall  be  set  to  50  percent.
 54.  The  methods  defined  in  this  Propagation  Model  require  the  establishment  of  geographic  lines
 between  paired  transmitter  and  receiver  locations,  with  elevation  values  determined  at  sample
 points  along  the  lines.  For  consistency  in  implementation,  the  locations  of  the  sample  points  along
 3  Transmission  Loss  Prediction  for  Tropospheric  Communication  Circuits,  Technical  Note  101,  NTIS  Access
 Number  AD  687-  820,  National  Technical  Information  Service,  US  Department  of  Commerce,  Springfield,  VA.
 4  An  example  of  such  a  software  implementation  is  the  Free  Space  +  RMD  method  included  in  some  products  of
 EDX  Engineering,  Inc.
 5  J.  Epstein  and  D.  W.  Peterson.  An  experimental  study  of  wave  propagation  at  850  Mc.,  Proc.  IRE,  vol.  41,  no.
 5,  pp.  595-  611,  May,  1953.
14
 Version  1.29  D-  15  April  21,  2000
 each  line  are  defined  to  be  spaced  at  0.25  km  intervals,  beginning  from  the  transmitter  location
 and  ending  at  the  0.25  km  point  just  prior  to  the  actual  receiver  location.  The  study  itself  shall
 end  at  the  actual  receiver  location.  The  elevation  of  points  along  the  line  shall  be  obtained
 through  bilinear  interpolation  of  the  elevation  values  of  the  surrounding  four  grid  levels  of  the
 USGS  3-  second  database.
 Propagation  Model  Outline
 55.  For  the  purposes  of  this  Methodology,  the  propagation  model  has  three  basic  elements  that
 affect  the  predicted  field  strength  at  the  receiver:
 1)  Line-  of-  Sight  (LOS)  mode,  using  basic  free-  space  path  loss
 2)  Non-  line-  of-  sight  (NLOS)  mode,  using  multiple  wedge  diffraction
 3)  Partial  first  Fresnel  zone  obstruction  losses  applicable  to  either  mode
 56.  The  LOS  and  NLOS  modes  are  mutually  exclusive    a  given  path  between  a  transmitter  and
 a  receiver  is  either  LOS  or  not.  The  fundamental  decision  as  to  whether  a  path  is  LOS  is  based  on
 the  path  geometry.  That  decision  is  described  in  the  next  subsection,  which  also  defines  the  LOS
 mode  for  the  model.
 Line-  of-  Sight  (LOS)  Mode
 57.  The  determination  of  whether  a  path  between  a  transmitter  and  a  receiver  is  LOS  is  made  by
 comparing  the  depression  angle  of  the  path  between  the  transmitter  and  receiver  with  the
 depression  angle  to  each  terrain  elevation  point  along  the  path.  The  depression  angle  from
 transmitter  to  receiver  is  computed  using  an  equation  of  the  form:
 T  t  r  r  t
 r
 r  h  h
 d
 d      
 2a  (4)
 where:
 T  t  r    is  the  depression  angle  relative  to  horizontal  from  the  transmitter  to  the  receiver
 in  radians
 h  t  is  the  elevation  of  the  transmit  antenna  center  of  radiation  above  mean  sea  level
 in  meters
 h  r  is  the  elevation  of  the  receive  antenna  center  of  radiation  above  mean  sea  level
 in  meters
 d  r  is  the  great  circle  distance  from  the  transmitter  to  the  receiver  in  meters
 a  is  the  effective  earth  radius  in  meters  taking  into  account  atmospheric  refractivity
15
 Version  1.29  D-  16  April  21,  2000
 58.  The  atmospheric  refractivity  is  usually  called  the  K  factor.  A  typical  value  of  K  is  1.333,  and
 using  the  actual  earth  radius  of  6340  kilometers,  a  would  equal  8451  kilometers,  or  8,451,000
 meters.  For  the  purpose  of  these  Rules,  K  =  1.333  shall  be  used.
 59.  Using  an  equation  of  the  same  form,  the  depression  angle  from  the  transmitter  to  any  terrain
 elevation  point  can  be  found  as:
 T  t  p  p  t
 p
 p  h  h
 d
 d      
 2a  (5)
 where:
 T  t  p    is  the  depression  angle  relative  to  horizontal  for  the  ray  between  the  transmitter  and  the  point
 on  the  terrain  profile
 hp  is  the  elevation  of  the  terrain  point  above  mean  sea  level  in  meters
 d  p  is  the  great  circle  path  distance  from  the  transmitter  to  the  point  on  the  terrain  path  in  meters
 h  a  t  and  are  as  defined  above  following  Equation  (4).
 60.  The  variable  T  t  p    is  calculated  at  every  point  along  the  path  between  the  transmitter  and  the
 receiver  and  compared  to  T  t  r  .  If  the  condition  T  T  t  p  tr      !  is  true  at  any  point,  then  the  path  is
 considered  NLOS  and  the  model  formulations  in  the  subsection  on  Non-  Line-  of-  Sight  (NLOS)
 Mode  below  are  used.  If  T  T  t  p  tr      d  is  true  at  every  point,  then  the  transmitter-  receiver  path  is
 LOS  and  the  formulations  in  this  subsection  apply.
 61.  For  LOS  paths,  if  the  geometry  is  such  that  a  terrain  elevation  point  along  the  path  between
 the  transmitter  and  receiver  extends  into  the  0.6  first  Fresnel  zone,  then  an  additional  loss  ranging
 from  0  to  6  dB  is  included  for  partial  Fresnel  zone  obstruction.  This  calculation  is  presented  next.
 Attenuation  Due  to  Partial  Obstruction  of  the  Fresnel  Zone
 62.  When  a  path  is  LOS  but  terrain  obstacles  are  close  to  obstructing  the  path,  additional
 attenuation  will  occur.  This  attenuation  due  to  a  near  miss  of  obstacles  on  the  path  can  be
 taken  into  account  by  including  a  loss  term  in  the  LOS  formulation  which  is  based  on  the  extent  to
 which  an  obstacle  penetrates  the  first  Fresnel  zone.  From  diffraction  theory,  when  the  ray  just
 grazes  an  obstacle,  the  field  on  the  other  side  is  reduced  by  6  dB  (half  the  wavefront  is
 obstructed).  When  the  clearance  between  the  obstacle  and  the  ray  path  is  0.6  of  the  first  Fresnel
 zone,  the  change  in  the  field  strength  at  the  receiver  is  0  dB,  and  with  additional  clearance  a  field
 strength  increase  of  6  dB  can  occur  owing  to  the  in-  phase  contribution  from  the  ray  diffracted
 from  the  obstacle.  For  additional  clearance,  an  oscillatory  pattern  in  the  field  strength  occurs.
16
 Version  1.29  D-  17  April  21,  2000
 63.  In  the  model  described,  if  the  ray  path  clears  intervening  obstacles  by  at  least  0.6  of  the  first
 Fresnel  zone,  then  no  adjustment  to  the  receiver  field  will  occur.  For  the  case  when  an  obstacle
 extends  into  the  0.6  first  Fresnel  zone,  a  loss  factor  ranging  from  0  to  6  dB  is  applied  based  on  a
 linear  proportion  of  how  much  of  the  0.6  First  Fresnel  zone  is  penetrated.  This  Fresnel  zone  path
 loss  or  attenuation  term  can  be  written  as:
 A  C  d  R  d  Fresnel  obs  p  FR  p                    60  10  ..  ()  ()  dB  (6)
 where:
 C  obs  p  (d  )  is  the  height  difference  in  meters  between  the  ray  path  and  the  terrain  elevation  at
 distance  d  p  along  the  path
 R  FR  p  (d  )  is  the  0.6  first  Fresnel  zone  radius  at  distance  d  p  along  the  path
 64.  The  values  C  d  obs  p  ()  and  R  FR  p  (d  )  are  calculated  taking  into  account  the  effective  earth
 radius  using  the  K  factor.  The  0.6  first  Fresnel  zone  radius  is  given  by
     
 
     
   
 r
 p  r  p
 p  FR
 d  f
 d  d  R  )  (d  547.533  0.6  )  (d  meters  (7)
 where  f  is  the  frequency  in  MHz  and  all  distances  are  in  kilometers.
 65.  The  use  of  the  partial  Fresnel  zone  obstruction  loss  from  0  dB  at  0.6  clearance  to  6  dB  at
 grazing  also  provides  a  smooth  transition  into  the  NLOS  mode  in  which  knife-  edge  diffraction
 loss  just  below  grazing  will  start  at  6  dB  and  increase  for  steeper  ray  bending  angles  to  receiving
 locations  in  the  shadowed  region.  Note  that  this  attenuation  factor  is  found  only  for  the  terrain
 profile  point  that  extends  farthest  into  the  0.  6  first  Fresnel  zone,  not  for  every  profile  point  which
 extends  into  the  0.  6  first  Fresnel  zone.
 Summary  of  Calculation  of  Field  Strength  at  the  Receiver  Under  LOS  Conditions
 66.  The  formulations  for  computing  the  field  strength  at  the  receiver  under  LOS  conditions  can  be
 summarized  with  the  following  equation:
 )  74.77  dBPV/m  Fresnel  T  r  r  A  P  20log(d  E        (8)
 where  Er  is  the  field  strength  at  the  receiver  in  dBV/  m,  dr  is  the  distance  from  transmitter  to
 receiver  in  kilometers,  and  A  Fresnel  is  the  partial  Fresnel  zone  obstruction  loss  from  Equation  (6).
 The  term  P  T  is  the  equivalent  isotropic  radiated  power  (EIRP)  in  dBW  in  the  direction  of  the
 receiver.
17
 Version  1.29  D-  18  April  21,  2000
 67.  In  terms  of  path  loss  between  two  antennas  with  gains  of  0  dBi  in  the  path  direction,  Equation
 (8)  can  be  written  as:
 dB  log  20  log  0  .  20  45  .  32  Fresnel  r  LOS  A  d  f  L        (9)
 where  LLOS  is  the  line-  of-  sight  path  loss  in  dB,  f  is  frequency  in  MHz,  and  dr  is  the  distance  from
 transmitter  to  receiver  in  kilometers.
 Non-  Line-  of-  Sight  (NLOS)  Mode
 68.  The  mechanism  for  deciding  when  to  use  the  LOS  mode  and  when  to  use  the  NLOS  mode  is
 described  at  the  beginning  of  the  subsection  on  Line-  of-  Sight  Mode  above.  When  the  model
 elects  to  use  the  NLOS  formulations  to  follow,  it  means  that  one  or  more  terrain  or  other  features
 obstructs  the  ray  path  directly  from  the  transmitter  to  the  receiver.  In  this  case,  the  free  space
 field  strength  is  further  reduced  for  the  attenuation  caused  by  the  obstacles.  For  the  model
 defined  here,  the  calculation  of  obstruction  loss  over  an  obstacle  is  done  by  assuming  the  obstacle
 is  a  perfect  electrical  conductor  rounded  obstacle  with  a  height  equal  to  the  elevation  of  the
 obstruction  and  a  radius  equal  to  1  meter.  This  approximation  has  been  shown  to  be  effective  in
 modeling  hills  and  other  terrain  obstructions,  which  do  not  behave  as  knife  edges  in  practice.
 Diffraction  loss  in  this  model  is  calculated  assuming  individual  obstacles  on  the  path  can  be
 modeled  as  isolated  rounded  obstacles.  The  losses  from  multiple  isolated  obstacles  are  then
 combined.
 Diffraction  Loss
 69.  The  loss  over  an  individual  rounded  obstacle  is  primarily  a  function  of  the  parameter  Q  that  is
 related  to  the  path  clearance  over  the  obstacle.  The  total  diffraction  loss,  A  v  (,  )  U  ,  in  dB,  is  the
 sum  of  three  parts    A  v  A  (,),  (,  )  0  0U  ,  and  U  v  (,  )  U  .  The  equations  to  calculate  the  total  and  the
 three  parts  are  given  below:
 A  v  A  v  A  Uv  (,  )  (,)  (,  )  (,  )  U  UU      0  0  (10)
 A  v  v  v  (,)  .  .  .  0  6  02  9  0  165  2      for    dd  08  0  .  v  (11)
 2  27  .  1  11  .  9  02  .  6  )  0  ,  (  v  v  v  A      for  0  2  4    d  v  .  (12)
 )  (  log  20  953  .  12  )  0  ,  (  10  v  v  A    for  v  !  2  4  .  (13)
 3  2  256  .  0  418  .  3  556  .  5  02  .  6  )  ,  0  (  U  U  U  U        A  (14)
 02  .  6  )  (  206  .  0  )  (  19  .  2  45  .  11  )  ,  (  3  2        U  U  U  U  v  v  v  v  U  for  vU  d  3  (15)
 U  v  v  v  v  (,  )  .  .  (  )  .  (  )  .  U  UUU      1347  1058  0  048  6  02  2  3  for  3  5    d  vU  (16)
 U  v  v  (,  )  .  U  U    20  18  2  for  5!  U  v  (17)
18
 Version  1.29  D-  19  April  21,  2000
 where  the  curvature  factor  is
 0.5
 2  1
 0.1667  0.333
     
 
     
   
 d  d
 d  f  0.676R  U  (18)
 70.  The  obstacle  radius  R  and  the  distances  d,  d1,  and  d2  are  in  kilometers,  and  the  frequency  f  is
 in  MHz.  The  distance  term  d  is  the  path  length  from  the  transmitter  (or  preceding  obstacle)  to  the
 receiver  (or  next  obstacle),  d  1  is  the  distance  from  the  transmitter  (or  preceding  obstacle)  to  the
 obstacle,  and  d  2  is  the  distance  from  the  obstacle  to  the  receiver  (or  next  obstacle).  When  the
 radius  is  zero,  the  obstacle  is  a  knife-  edge,  and  A  v  A  v  (,  (,)  U)  0  .
 71.  The  parameter  Q  in  the  equations  above  takes  into  account  the  geometry  of  the  path  and  can
 be  thought  of  as  the  bending  angle  of  the  radio  path  over  the  obstacle.  It  is  computed  as:
 v  2d  )  tan(D  tan(E)  O  (19)
 where  d  is  the  path  length  from  the  transmitter  (or  preceding  obstacle)  to  the  receiver  (or  next
 obstacle),  D  is  the  angle  relative  to  a  line  from  the  transmitter  (or  preceding  obstacle)  to  the
 receiver  (or  next  obstacle),  and  E  is  the  angle  relative  to  a  line  from  the  receiver  (or  next
 obstacle)  to  the  transmitter  (or  preceding  obstacle).  The  distance  d  and  the  wavelength  O  are  in
 the  same  units  as  one  another,  e.  g.,  kilometers.  The  definitions  of  D  and  E  are  shown  in  Figure
 1.  For  the  multiple  obstacle  case,  obstacles  are  treated  successively  as  transmitter-  obstacle-
 receiver  triads  to  construct  the  path  geometry  and  bending  angle  Q  over  each  obstacle.  The  value
 of  v  is  then  used  to  calculate  the  diffraction  loss  over  each  obstacle.  The  resulting  obstacle  losses
 are  summed  to  arrive  at  the  total  obstacle  diffraction  loss  for  the  path.
 Transmitter  or  preceding
 obstacle
 Receiver  or
 succeeding  obstacle
 D  E
 d
 knife-  edge  obstacle  approximates  real
 terrain  obstacle
 Figure  1.  Geometry  for  computing  Q
19
 Version  1.29  D-  20  April  21,  2000
 Summary  of  Calculation  of  Field  Strength  at  the  Receiver  Under  NLOS  Conditions
 72.  The  field  strength  at  the  receiver  in  the  NLOS  mode  can  then  be  written  as:
 )  74.77  dBPV/m  diff  T  r  r  A  P  20log(d  E        (20)
 where  Er  is  the  field  strength  at  the  receiver  in  dBV/  m,  dr  is  the  distance  from  transmitter  to
 receiver  in  kilometers,  and  P  T  is  the  equivalent  isotropic  radiated  power  (EIRP)  in  dBW  in  the
 direction  of  the  receiver.  The  term  Adiff  is  defined  as:
       obs
 n
 n
 n  diff  A  A
 1
 ,  U  Q  dB  (21)
 where      A  Q  U  ,  is  defined  in  Equation  (10)  and  nobs  is  the  number  of  obstructions  in  the  path.
 73.  The  corresponding  path  loss  between  antennas  with  0  dBi  gain  in  the  path  direction  can  be
 written  as:
 L  fdA  NLOS  r  diff      32.45  20.0log  20log  dB  (22)
 where  LNLOS  is  the  non-  line-  of-  sight  path  loss  in  dB,  f  is  frequency  in  MHz,  and  dr  is  the  distance
 from  transmitter  to  receiver  in  kilometers.
 File  Format
 74.  To  facilitate  the  exchange  of  data  on  two-  way  MDS  and  ITFS  systems  permissible  under  Parts
 21  and  74,  a  file  format  is  herein  described  for  the  submission  of  requisite  technical  data  to  be
 provided  to  the  Commission  and  to  all  parties  that  must  be  served  with  notice  of  the  applications
 and/  or  engineering  studies.  The  media  shall  be  either  3-  inch  floppy  disks  or  CD-  ROMs.  The
 media  and  basic  formatting  of  that  media  are  defined  either  by  ISO/  IEC  Standards  9293,  6  9529-
 1,  7  and  9529-  2  8  for  3-  inch  floppy  disks  9  or  ISO  Standard  9660  10  for  CD-  ROMs.
 6  ISO/  IEC  9293:  1994,  Information  Technology    Volume  and  File  Structure  of  Flexible  Disk  Cartridges  for
 Information  Interchange
 7  ISO/  IEC  9529-  1:  1987,  Information  Processing  Systems  Data  Interchange  on  90  mm  (3.5  in)  Flexible  Disk
 Cartridges  Using  Modified  Frequency  Modulation  Recording  at  15916  ftprad  on  80  Tracks  on  Each  Side    Part  1:
 Dimensional,  Physical  and  Magnetic  Characteristics.
 8  ISO/  IEC  9529-  2:  1987,  Information  Processing  Systems    Data  Interchange  on  90  mm  (3.5  in)  Flexible  Disk
 Cartridges  Using  Modified  Frequency  Modulation  Recording  at  15916  ftprad  on  80  Tracks  on  Each  Side    Part  2:
 Track  Format
20
 Version  1.29  D-  21  April  21,  2000
 75.  A  file  structured  according  to  the  file  format  shall  be  submitted  individually  for  each  Response
 Station  Hub  (RSH)  and  associated  Response  Service  Area  (RSA),  i.  e.,  there  shall  be  only  one
 RSH/  RSA  combination  defined  per  file.  It  is  permissible  to  store  multiple  such  files  on  a  single
 disk  so  long  as  each  file  is  completely  contained  on  a  single  disk,  i.  e.,  files  may  not  span  disks.  In
 addition  to  the  files  structured  according  to  the  following  format,  each  disk  that  contains  a  file
 describing  an  RSH/  RSA  combination  that  is  part  of  a  system  shall  include  a  copy  of  an  Index  File
 that  lists  all  of  the  files  related  to  the  system.  The  Index  File  shall  be  in  ASCII  coding  and  shall
 list  the  file  names,  dates  and  times  of  storage,  and  sizes  in  bytes  of  the  files  associated  with  all  the
 Response  Station  Hubs  in  the  system.  Furthermore,  all  the  disks  related  to  the  system  shall  be
 labeled  with  their  specific  contents,  including  the  data  required  in  the  Index  File  for  the  particular
 files  contained  on  each  disk.  Each  label  shall  also  indicate  the  total  number  of  disks  in  the  series
 and  the  sequence  number  of  the  disk  on  which  it  appears.  The  Index  File  name  shall  consist  of  the
 name  of  the  licensee  or  applicant  (which  may  be  abbreviated,  but  which  must  be  consistently
 abbreviated  in  the  same  way  by  a  single  licensee  or  applicant)  followed  by  a  hyphen,  followed  by
 the  name  of  the  city  where  the  system  is  located.  This  shall  be  followed  by  a  decimal  point  and
 the  extension  idx.
 76.  The  remainder  of  this  document  outlines  the  format  of  technical  information  regarding  each
 Response  Service  Area  (RSA)  to  be  submitted  with  each  MDS/  ITFS  two-  way  application.  The
 data  shall  appear  in  a  number  of  sections  for  the  purpose  of  grouping  similar  items  within  the  file.
 Data  shall  be  coded  in  an  ASCII-  formatted,  11  comma-  delimited  file.  Carriage  return  (0Dh)  and
 line  feed  (0Ah)  characters  shall  be  placed  at  the  end  of  each  line  in  the  file,  as  is  normal  when
 using  standard  text  editors.  To  help  in  identifying  data,  where  file  sections  are  formatted  as
 tables,  the  first  entry  in  each  row  within  a  table  shall  be  a  sequence  number  indicating  the  position
 of  the  row  within  the  table.  To  the  extent  possible,  the  sequence  number  shall  be  representative
 of  the  type  of  data  contained  on  the  row,  such  as  the  number  of  degrees  of  azimuth  or  elevation.
 77.  A  generic  example  of  the  required  file  construction  appears  at  the  end  of  this  section  and  may
 be  used  as  a  template  for  the  submission  of  data.  As  shown  there,  section  titles  shall  appear  on  a
 separate  line  in  square  brackets  [  ]  and  shall  be  separated  from  the  preceding  sections  and  from
 the  data  within  their  own  sections  by  a  blank  line.  Headers  shall  appear  on  the  top  line  of  the  data
 contained  within  a  section.  Headers  may  contain  data  and  may  also  help  with  both  human  and
 machine  readability.
 9  The  cited  ISO/  IEC  standards  describe  disks  having  a  formatted  capacity  of  1.  44  Mbytes.  It  is  intended  to  allow
 the  use  of  disks  of  other  capacities  (such  as  720  kBytes)  based  upon  the  same  techniques  as  and  compatible  with
 the  disks  described  in  the  specified  standards.
 10  ISO  9660:  1988,  Information  Processing    Volume  and  File  Structure  of  CD-  ROM  for  Information  Interchange
 11  ANSI  X3.4-  1986  (R1992),  Coded  Character  Set    7-  Bit  American  National  Standard  Code  for  Information
 Interchange
21
 Version  1.29  D-  22  April  21,  2000
 78.  Units  of  measure  that  are  to  be  utilized  for  all  information  supplied  in  the  file  are:
 Latitude    Degrees,  Minutes,  Seconds  (DD,  MM,  SS.  S)  (to  1  decimal  place  in  seconds)  12
 Longitude    Degrees,  Minutes,  Seconds  (DDD,  MM,  SS.  S)  (to  1  decimal  place  in  seconds)  12
 Azimuth  or  Bearing    Degrees  (to  1  decimal  place)
 Radius    Kilometers  (to  2  decimal  places)
 Ground  Elevation    Meters  AMSL  (to  0  decimal  places)
 Antenna  Height    Meters  AGL  (to  0  decimal  places)
 Electrical  Beam  Tilt    Degrees  (to  1  decimal  place)
 Mechanical  Beam  Tilt    Degrees  (to  1  decimal  place)
 Azimuth  of  Mechanical  Beam  Tilt    Degrees  (to  1  decimal  place)
 Power  (EIRP)    dBW  (to  2  decimal  places)
 Antenna  Gain    dBi  (to  2  decimal  places)
 Frequency    MHz  (to  3  decimal  places)
 1.  General  Information
 Section  Title:  General  Info
 Entries:  File  Name
 Licensee/  Applicant  name
 City/  State  of  hub  location
 Coordinates  of  hub  location
 Ground  Elevation  of  hub  location  (meters)
 Call  sign  of  station  being  modified/  file  number  of  application  being  amended
 City/  State  of  station  being  modified
 79.  The  File  Name  included  in  this  section  of  the  data  file  shall  be  the  name  originally  given  to  the
 data  file  when  it  was  created.  This  will  assure  that,  even  should  the  name  of  the  data  file  be
 changed,  it  can  be  identified  by  its  original  name.  It  is  this  name  that  shall  be  included  in  the  Index
 File  required  to  appear  on  each  disk  of  the  set  of  files  describing  a  complete  system.  The  File
 Name  shall  be  constructed  from  the  call  sign  originally  assigned  for  downstream  service  and
 modified  for  two-  way  upstream  service  followed  by  a  hyphen,  followed  by  a  six-  digit  number
 giving  the  latitude  of  the  RSH,  followed  by  another  hyphen,  followed  by  a  seven-  digit  number
 giving  the  longitude  of  the  RSH.  The  name  of  the  data  file  shall  be  completed  by  appending  a
 decimal  point  followed  by  the  extension  dat  to  the  name  as  defined  above.  When  a  file  is
 updated  as  a  result  of  modifications  to  a  license  or  amendments  to  an  application,  the  file  name
 shall  be  modified  by  appending  a  hyphen  and  a  letter  before  the  decimal  point  and  the  extension.
 12  All  coordinates  shall  be  based  on  use  of  the  U.  S.  Geological  Survey  (USGS)  3-  second  database  and  shall  be
 referenced  to  the  1983  North  American  Datum  (NAD-  83).
22
 Version  1.29  D-  23  April  21,  2000
 The  letter  shall  be  incremented  with  each  successive  revision  to  the  file,  beginning  with  a  and
 progressing  through  z.  Should  higher  values  be  required,  double  letters  aa  through  zz  shall
 be  used,  incrementing  the  second  letter  and  then  the  first.  When  a  call  sign  for  an  existing
 downstream  service  does  not  exist,  the  identifier  of  the  authorization  document  from  the
 Commission  assigning  the  subject  channel  to  the  applicant  shall  be  used  in  its  place.
 80.  The  name  either  of  the  licensee  or  of  the  applicant,  if  not  the  licensee,  filing  the  application
 with  which  the  file  is  connected  shall  be  included  in  the  General  Info  section.  The  designation  on
 the  line  that  contains  this  information  shall  be  either  Licensee  or  Applicant,  as  appropriate.
 2.  Geographic  Boundary  Definitions    Circular  Areas
 Section  Title:  Circular  Geographic  Areas
 Header:  RSA  Circular  (0  or  1),  Regions  Circular  (00  or  RR,  where  RR  =  total  #  of
 circular  regions)
 Entries:  00,  RSA  Reference  Latitude,  RSA  Reference  Longitude,  RSA  Radius  (omit
 RSA  Radius  if  RSA  is  non-  circular)
 01,  Region  01  Center  Latitude,  Region  01  Center  Longitude,  Region  01
 Radius
 02,  Region  02  Center  Latitude,  Region  02  Center  Longitude,  Region  02
 Radius
 :
 :
 RR,  Region  RR  Center  Latitude,  Region  RR  Center  Longitude,  Region  RR
 Radius
 81.  The  geographic  area  of  an  RSA  or  region  may  be  described  by  a  circle  having  a  defined  center
 point  location  and  a  radius.  If  the  RSA  is  circular,  then  RSA  Circular  =  1,  otherwise
 RSA  Circular  =  0.
 82.  If  there  are  circular  regions,  then  Regions  Circular  =  the  number  of  such  regions,  RR.
 Otherwise,  Regions  Circular  =  00.
 83.  The  RSA  reference  latitude  and  longitude  are  required  in  all  cases  and  appear  in  this  section
 for  both  circular  and  non-  circular  RSAs.  If  the  RSA  is  non-  circular,  the  radius  is  not  given.
 Where  the  hub  is  outside  the  RSA,  the  reference  point  is  that  point,  measured  in  degrees,  minutes,
 and  seconds  (to  the  nearest  one-  tenth  second),  that  is  midway  between  the  eastern-  and  western-most
 extremes  of  the  RSA  and  also  midway  between  the  northern-  and  southern-  most  extremes  of
 the  RSA.  It  should  be  noted  that  the  RSA  reference  point  could  fall  outside  the  RSA  itself.
 84.  Circular  regions  may  share  the  same  center  point  and  have  different  radii,  their  circumferences
 thus  forming  concentric  circles.  In  this  situation,  the  circular  region  with  the  smallest  radius
 extends  from  the  center  point  to  its  circumference.  All  the  other  regions  constitute  annular  rings,
 the  inner  radii  of  which  are  the  outer  radii  of  the  center  region  or  of  the  next  inner  rings  and  the
23
 Version  1.29  D-  24  April  21,  2000
 outer  radii  of  which  are  those  listed  for  the  region.  When  such  concentric  regions  exist,  they  shall
 be  listed  in  the  order  of  increasing  radius.
 85.  Circular  regions  may  be  defined  having  boundaries  that  extend  beyond  the  boundary  of  the
 RSA.  In  such  cases,  the  boundaries  of  the  regions  shall  be  deemed  to  be  truncated  (cut  off)  by  the
 boundary  of  the  RSA.  Thus  no  grid  points  beyond  the  RSA  boundary  shall  be  considered  in
 interference  analyses,  and  no  response  stations  beyond  the  RSA  boundary  shall  be  installed  as  a
 result  of  such  a  region  definition.
 3.  Geographic  Boundary  Definitions    Non-  Circular  Areas
 Section  Title:  Non-  Circular  Areas
 Header:  RSA  Non-  Circular  (0  or  1),  Regions  Non-  Circular  (00  or  NN,  where  NN  =
 total  #  of  non-  circular  regions),
 Entries:  RSA  Entry  Title,  #  of  boundary  points  defining  RSA  (XXX)
 RSA  Latitude  (001),  RSA  Longitude  (001)
 RSA  Latitude  (002),  RSA  Longitude  (002)
 RSA  Latitude  (003),  RSA  Longitude  (003)
 :
 RSA  Latitude  (XXX),  RSA  Longitude  (XXX)
 Region  RR+  1  Entry  Title,  #  of  boundary  points  defining  region  RR+  1  (AAA)
 Region  RR+  1  Latitude  (001),  Region  RR+  1  Longitude  (001)
 Region  RR+  1  Latitude  (002),  Region  RR+  1  Longitude  (002)
 Region  RR+  1  Latitude  (003),  Region  RR+  1  Longitude  (003)
 :
 Region  RR+  1  Latitude  (AAA),  Region  RR+  1  Longitude  (AAA)
 Region  RR+  2  Entry  Title,  #  of  boundary  points  defining  region  RR+  2  (BBB)
 Region  RR+  2  Latitude  (001),  Region  RR+  2  Longitude  (001)
 Region  RR+  2  Latitude  (002),  Region  RR+  2  Longitude  (002)
 Region  RR+  2  Latitude  (003),  Region  RR+  2  Longitude  (003)
 :
 Region  RR+  2  Latitude  (BBB),  Region  RR+  2  Longitude  (BBB)
 :
 :
 Region  RR+  NN  Entry  Title,  #  of  boundary  points  defining  region  RR+  NN
 (ZZZ)
 Region  RR+  NN  Latitude  (001),  Region  RR+  NN  Longitude  (001)
 Region  RR+  NN  Latitude  (002),  Region  RR+  NN  Longitude  (002)
 Region  RR+  NN  Latitude  (003),  Region  RR+  NN  Longitude  (003)
 ,  :
 Region  RR+  NN  Latitude  (ZZZ),  Region  RR+  NN  Longitude  (ZZZ)
 86.  The  geographic  descriptions  of  an  RSA  in  the  sections  for  Circular  Areas  (Section  2)  and  for
 Non-  Circular  Areas  are  mutually  exclusive.  One  of  them  shall  have  the  RSA  indicator  set  to  1;
24
 Version  1.29  D-  25  April  21,  2000
 the  other  shall  be  set  to  0.  When  the  Non-  Circular  Area  RSA  indicator  is  set  to  0,  the  RSA  list
 header  and  the  list  of  RSA  coordinates  shall  be  omitted.
 87.  The  reference  point  coordinates  for  both  types  of  RSA  are  contained  in  the  section  on  Circular
 Areas.  Where  the  hub  is  outside  the  RSA,  the  reference  point  is  that  point,  measured  in  degrees,
 minutes,  and  seconds  (to  the  nearest  one-  tenth  second),  that  is  midway  between  the  eastern-  and
 western-  most  extremes  of  the  RSA  and  also  midway  between  the  northern-  and  southern-  most
 extremes  of  the  RSA.  It  should  be  noted  that  the  RSA  reference  point  could  fall  outside  the  RSA
 itself.
 88.  Regions  of  both  types,  i.  e.,  circular  and  non-  circular,  are  permitted  within  a  single  RSA.
 Regions  in  this  non-  circular  section  shall  be  numbered  sequentially  continuing  from  the  last  region
 number  in  the  circular  section,  i.  e.,  from  RR+  1  to  RR+  NN,  so  that  all  regions  have  unique  region
 numbers.
 89.  The  data  for  the  RSA  and  for  the  region  boundary  descriptions  list  pairs  of  latitude  and
 longitude  coordinates  in  sequence,  with  each  group  of  data  following  an  entry  header.  The  entry
 header  includes  a  title  that  numbers  the  area  to  which  its  data  applies  and  a  value  indicating  the
 number  of  entries  in  the  list  for  its  area.
 90.  Non-  circular  regions  may  be  nested  within  one  another,  the  inner  regions  subtracting  from  the
 areas  covered  by  the  outer  regions.  In  this  situation,  a  region  with  the  smallest  area  extends  to  its
 perimeter.  All  other  regions  have  voids  where  the  inner  regions  are  located.  When  such  nested
 regions  exist,  they  shall  be  listed  in  the  order  of  increasing  perimeter  size  of  interior  regions  until
 the  outermost  region  is  reached.
 91.  Non-  circular  regions  may  be  defined  having  boundaries  that  extend  beyond  the  boundary  of
 the  RSA.  In  such  cases,  the  boundaries  of  the  regions  shall  be  deemed  to  be  truncated  (cut  off)  by
 the  boundary  of  the  RSA.  Thus  no  grid  points  beyond  the  RSA  boundary  shall  be  considered  in
 interference  analyses,  and  no  response  stations  beyond  the  RSA  boundary  shall  be  installed  as  a
 result  of  such  a  region  definition.
 4.  Hub  Sectorization  Data
 Section  Title:  Sectorization
 Header:  #  of  sectors  within  RSA  (SS)
 Entries:  Sector  01,  Hub  Receive  Antenna  Pattern  #,  Gain,  Azimuth  of  Main  Lobe  or
 Azimuth  of  Symmetry,  Height  AGL,  Mechanical  Beam  Tilt,  Azimuth  of
 Mechanical  Beam  Tilt,  Polarization,  Max  Simultaneous  Transmitters
 Sector  02,  Hub  Receive  Antenna  Pattern  #,  Gain,  Azimuth  of  Main  Lobe  or
 Azimuth  of  Symmetry,  Height  AGL,  Mechanical  Beam  Tilt,  Azimuth  of
 Mechanical  Beam  Tilt,  Polarization,  Max  Simultaneous  Transmitters
 :
 :
25
 Version  1.29  D-  26  April  21,  2000
 Sector  (SS),  Hub  Receive  Antenna  Pattern  #,  Gain,  Azimuth  of  Main  Lobe
 or  Azimuth  of  Symmetry,  Height  AGL,  Mechanical  Beam  Tilt,  Azimuth  of
 Mechanical  Beam  Tilt,  Polarization,  Max  Simultaneous  Transmitters
 92.  Each  sector  is  to  be  assigned  a  number  beginning  with  the  sector  whose  main  lobe  azimuth  is
 pointing  due  north  or  the  closest  to  due  north,  proceeding  in  a  clockwise  direction  from  true
 north,  numbering  each  sector  in  succession.
 93.  The  receiving  antenna  pattern  used  in  each  sector  is  defined  in  the  Antenna  Pattern  Data
 section,  and  the  association  of  each  sector  with  a  specific  antenna  pattern  is  made  here.  This
 pattern  shall  be  used  in  the  calculation  of  potential  interference  to  a  hub  from  surrounding
 stations.
 94.  The  geographic  definition  of  each  sector  is  found  in  the  Sector  Geographic  Definitions
 section.
 95.  Any  mechanical  beam  tilt  and  the  azimuth  of  any  mechanical  beam  tilt  for  each  hub  receiving
 antenna  are  specified  in  this  section.  Tilting  the  antenna  downward  is  defined  using  a  positive
 number.  The  Azimuth  of  Mechanical  Beam  Tilt  shall  specify  the  direction  having  the  greatest
 downward  depression.
 96.  The  polarization  of  each  sector  is  defined  as  horizontal  (H),  vertical  (V),  or  both  (B).  The
 maximum  number  of  transmitters  that  can  operate  simultaneously  on  the  channel  or  on  each  sub-channel
 within  each  sector  is  specified  in  this  section.  The  number  specified  shall  apply  to  each
 sub-  channel  with  power  proportioned  on  a  power  spectral  density  basis.
 5.  Grid  Point  Definitions
 Section  Title:  Grid  Points
 Header:  #  of  grid  points  (MMMM)
 Entries:  Point  0001:  Latitude,  Longitude,  Elevation,  Region  #  in  which  Located,
 Bearing  to  Hub,  Polarization  (H,  V,  or  B),  Number  of  associated  Class(  es)  of
 Station(  s),  Class  Designators
 Point  0002:  Latitude,  Longitude,  Elevation,  Region  #  in  which  Located,
 Bearing  to  Hub,  Polarization  (H,  V,  or  B),  Number  of  associated  Class(  es)  of
 Station(  s),  Class  Designators
 :
 :
 Point  MMMM:  Latitude,  Longitude,  Elevation,  Region  #  in  which  Located,
 Bearing  to  Hub,  Polarization  (H,  V,  or  B),  Number  of  associated  Class(  es)  of
 Station(  s),  Class  Designators
 97.  The  header  specifies  the  total  number  of  grid  points  (MMMM)  defined  in  the  Grid  Point
 Definition  Table.
26
 Version  1.29  D-  27  April  21,  2000
 98.  The  location  of  each  grid  point  is  defined  by  latitude  and  longitude.  The  bearing  from  the  grid
 point  to  the  hub  is  specified.  The  region  in  which  the  grid  point  is  located  is  indicated  using  the
 region  number  assigned  in  the  sections  above  giving  geographic  boundary  definitions.  Grid  points
 not  located  in  specifically  defined  regions  shall  be  indicated  as  being  in  Region  00,  which
 describes  the  remainder  of  the  RSA.  Grid  points  that  are  inactive  because  of  the  impossibility  of
 installing  response  stations  at  their  locations  shall  be  shown  as  belonging  to  Region  --
 (16h,  16h).  Inactive  grid  points  shall  have  the  associated  Polarization,  Number  of  Classes,  and
 Class  Designator  value  positions  filled  with  the  space  character  (20h)  as  a  place  holder.
 99.  Polarization  for  each  grid  point  must  be  specified  as  horizontal  (H),  vertical  (V),  or  both  (B).
 In  areas  where  sectors  having  opposite  polarizations  overlap,  it  may  be  desirable  to  have  the
 flexibility  to  utilize  both  polarizations.  If  so,  grid  points  in  these  overlapping  areas  must  be
 specified  as  B,  both  polarizations.
 100.  Each  active  grid  point  must  be  assigned  at  least  one  class  of  station.  Assignment  of
 multiple  classes  to  a  single  grid  point  is  also  permitted.
 6.  Sector  Geographic  Definitions
 Section  Title:  Sector  Definitions
 Header:  #  of  sectors  (SS),  Bearings  or  Coordinates  (B)
 Entries:  Sector  01,  Start  Bearing,  Stop  Bearing
 (Bearings)  Sector  02,  Start  Bearing,  Stop  Bearing
 :
 Sector  SS,  Start  Bearing,  Stop  Bearing
 OR
 Table  Header:  #  of  sectors  (SS),  Bearings  or  Coordinates  (C)
 Entries:  Sector  01  Entry  Title,  #  of  Coordinates  in  Sector  01  (AAA)
 Sector  01Latitude  (001),  Sector  01  Longitude  (001)
 Sector  01  Latitude  (002),  Sector  01  Longitude  (002)
 Sector  01  Latitude  (003),  Sector  01  Longitude  (003)
 :
 Sector  01  Latitude  (AAA),  Sector  01  Longitude  (AAA)
 Sector  02  Entry  Title,  #  of  Coordinates  in  Sector  02  (BBB)
 Sector  02  Latitude  (001),  Sector  02  Longitude  (001)
 Sector  02  Latitude  (002),  Sector  02  Longitude  (002)
 Sector  02  Latitude  (003),  Sector  02  Longitude  (003)
 :
 Sector  02  Latitude  (BBB),  Sector  02  Longitude  (BBB)
 Sector  03  Entry  Title,  #  of  Coordinates  in  Sector  03  (CCC)
 Sector  03  Latitude  (001),  Sector  03  Longitude  (001)
 Sector  03  Latitude  (002),  Sector  03  Longitude  (002)
27
 Version  1.29  D-  28  April  21,  2000
 Sector  03  Latitude  (003),  Sector  03  Longitude  (003)
 :
 Sector  03  Latitude  (CCC),  Sector  03  Longitude  (CCC)
 :
 :
 Sector  SS  Entry  Title,  #  of  Coordinates  in  Sector  SS  (ZZZ)
 Sector  SS  Latitude  (001),  Sector  SS  Longitude  (001)
 Sector  SS  Latitude  (002),  Sector  SS  Longitude  (002)
 Sector  SS  Latitude  (003),  Sector  SS  Longitude  (003)
 :
 Sector  SS  Latitude  (ZZZ),  Sector  SS  Longitude  (ZZZ)
 101.  Sector  geographic  boundaries  can  be  described  in  either  of  two  ways:  (1)  as  straight  lines
 radiating  out  from  the  hub  location  at  the  specified  bearings  until  they  cross  the  outer  boundary  of
 the  RSA,  or  (2)  as  sets  of  coordinates  between  which  straight  boundary  lines  exist  that  describe
 closed  geographic  areas.  In  either  case,  sectors  may  overlap,  and,  when  they  do,  grid  points  in
 the  overlap  areas  must  be  analyzed  as  though  they  were  included  exclusively  within  each  sector.
 When  sets  of  coordinates  are  used,  the  last  coordinate  pair  shall  be  assumed  to  connect  to  the  first
 such  pair.
 102.  The  data  for  the  sector  boundary  descriptions  lists  pairs  of  latitude  and  longitude
 coordinates  in  sequence,  with  each  group  of  data  following  an  entry  header.  The  entry  header
 includes  a  title  that  numbers  the  area  to  which  its  data  applies  and  a  value  indicating  the  number  of
 entries  in  the  list  for  its  area.
 7.  Sector  Frequency  Plan
 Section  Title:  Frequency  Plan
 Header:  #  of  sectors  (SS)
 Entries:  Sector  1,  #  of  Response  Bands  (R1)
 Channel  Designator  1,  Lower  Frequency,  Upper  Frequency
 Channel  Designator  2,  Lower  Frequency,  Upper  Frequency
 :
 Channel  Designator  R1,  Lower  Frequency,  Upper  Frequency
 Sector  2,  #  of  Response  Bands  (R2)
 Channel  Designator  1,  Lower  Frequency,  Upper  Frequency
 Channel  Designator  2,  Lower  Frequency,  Upper  Frequency
 :
 Channel  Designator  R2,  Lower  Frequency,  Upper  Frequency
 :
 :
 Sector  SS,  #  of  Response  Bands  (RSS)
 Channel  Designator  1,  Lower  Frequency,  Upper  Frequency
 Channel  Designator  2,  Lower  Frequency,  Upper  Frequency
28
 Version  1.29  D-  29  April  21,  2000
 :
 Channel  Designator  RSS,  Lower  Frequency,  Upper  Frequency
 103.  The  header  specifies  the  number  of  sectors  for  which  frequency  plans  are  included.  The
 number  of  sectors  must  match  the  number  of  sectors  listed  previously  in  the  headers  of  the
 sections  with  the  titles  Sectorization  and  Sector  Definitions.  Sector  numbering  matches  that
 used  for  defining  the  sectorization  and  sector  geographic  boundaries  in  the  earlier  sections.
 104.  The  entry  for  each  sector  begins  with  a  line  listing  the  sector  number  and  the  number  of
 response  bands  defined  within  that  sector.  Response  bands  defined  are  the  frequency  ranges  to  be
 used  for  communication  from  response  stations  to  the  response  station  hub;  they  do  not  represent
 the  actual  subchannelization  used,  which  can  vary  from  time-  to-  time.  The  limits  of  one  response
 band  are  listed  on  a  single  line.  They  are  preceded  on  that  line  by  the  channel  designator  of  the  6
 MHz  channel  from  which  they  are  drawn  (e.  g.,  A3,  F2,  H1,  M2A).  There  can  be  multiple
 response  bands  within  a  single  6  MHz  channel,  in  which  case  the  channel  designator  will  appear  in
 the  list  more  than  once.  The  entire  6  MHz  channel  also  can  be  used,  in  which  case  its  limits  will
 be  shown.  Frequency  bands  are  listed  in  ascending  order.
 105.  Sector  data  proceeds  from  Sector  1  through  the  last  sector  (Sector  SS)  with  no  line  spaces
 between  the  data  from  adjacent  sectors.
 8.  Response  Station  Class  Data
 Section  Title:  Class  Info
 Header:  #  of  classes  (CL)
 Entries:  Class  1,  Worst  Case  Ant  Pattern  #,  Max  Height,  Max  Power,  Number  of
 Regions  in  Which  Used,  Region(  s)  in  Which  Used,  Maximum  Simultaneous
 Number  within  Each  Region
 Class  2,  Worst  Case  Ant  Pattern  #,  Max  Height,  Max  Power,  Number  of
 Regions  in  Which  Used,  Region(  s)  in  Which  Used,  Maximum  Simultaneous
 Number  within  Each  Region
 :
 :
 Class  CL,  Worst  Case  Ant  Pattern  #,  Max  Height,  Max  Power,  Number  of
 Regions  in  Which  Used,  Region(  s)  in  Which  Used,  Maximum  Simultaneous
 Number  within  Each  Region
 106.  Classes  are  defined  by  the  combination  of  the  worst  case  antenna  pattern,  the  maximum
 height  above  ground  level  (AGL)  at  which  the  antennas  may  be  mounted,  and  the  maximum
 power  (EIRP)  they  may  emit.
 107.  Associated  with  each  class  description  is  one  or  more  pairs  of  values  indicating  the  region
 numbers  in  which  the  class  is  used  and  the  maximum  number  of  transmitters  that  may  transmit
 simultaneously  on  the  channel  or  on  each  sub-  channel  within  each  region.  One  pair  is  present  for
29
 Version  1.29  D-  30  April  21,  2000
 each  region  in  which  the  particular  class  is  used.  The  regions  shall  be  listed  in  ascending
 numerical  order.  The  maximum  number  of  simultaneous  transmitters  specified  shall  apply  to  each
 sub-  channel  with  power  proportioned  on  a  power  spectral  density  basis.
 9.  Antenna  Pattern  Data  (Hub  Receive  and  Worst  Case  Response  Station  Transmit)
 Section  Title:  Antenna  Patterns
 Header:  #  hub  antenna  patterns  (HP),  #  of  worst  case  response  station  transmit  antenna
 patterns  (RP)
 Entries:  Hub  01  Entry  Title,  #  of  Value  Sets
 Degrees  of  Azimuth,  Plane  Polarized  dB,  &  Cross  Polarized  dB  Headings
 000  Degrees,  Plane  dB,  Cross  dB
 001  Degrees,  Plane  dB,  Cross  dB
 002  Degrees,  Plane  dB,  Cross  dB
 003  Degrees,  Plane  dB,  Cross  dB
 :
 :
 356  Degrees,  Plane  dB,  Cross  dB
 357  Degrees,  Plane  dB,  Cross  dB
 358  Degrees,  Plane  dB,  Cross  dB
 359  Degrees,  Plane  dB,  Cross  dB
 Degrees  of  Elevation,  Plane  Polarized  dB,  &  Cross  Polarized  dB  Headings
 -90  Degrees,  Plane  dB,  Cross  dB
 -89  Degrees,  Plane  dB,  Cross  dB
 -88  Degrees,  Plane  dB,  Cross  dB
 -87  Degrees,  Plane  dB,  Cross  dB
 :
 -01  Degrees,  Plane  dB,  Cross  dB
 000  Degrees,  Plane  dB,  Cross  dB
 +01  Degrees,  Plane  dB,  Cross  dB
 :
 +87  Degrees,  Plane  dB,  Cross  dB
 +88  Degrees,  Plane  dB,  Cross  dB
 +89  Degrees,  Plane  dB,  Cross  dB
 +90  Degrees,  Plane  dB,  Cross  dB
 Hub  02  Entry  Title,  #  of  Value  Sets
 Degrees  of  Azimuth,  Plane  Polarized  dB,  &  Cross  Polarized  dB  Headings
 000  Degrees,  Plane  dB,  Cross  dB
 001  Degrees,  Plane  dB,  Cross  dB
 002  Degrees,  Plane  dB,  Cross  dB
 003  Degrees,  Plane  dB,  Cross  dB
 :
 :
30
 Version  1.29  D-  31  April  21,  2000
 356  Degrees,  Plane  dB,  Cross  dB
 357  Degrees,  Plane  dB,  Cross  dB
 358  Degrees,  Plane  dB,  Cross  dB
 359  Degrees,  Plane  dB,  Cross  dB
 Degrees  of  Elevation,  Plane  Polarized  dB,  &  Cross  Polarized  dB  Headings
 -90  Degrees,  Plane  dB,  Cross  dB
 -89  Degrees,  Plane  dB,  Cross  dB
 -88  Degrees,  Plane  dB,  Cross  dB
 -87  Degrees,  Plane  dB,  Cross  dB
 :
 -01  Degrees,  Plane  dB,  Cross  dB
 000  Degrees,  Plane  dB,  Cross  dB
 +01  Degrees,  Plane  dB,  Cross  dB
 :
 +87  Degrees,  Plane  dB,  Cross  dB
 +88  Degrees,  Plane  dB,  Cross  dB
 +89  Degrees,  Plane  dB,  Cross  dB
 +90  Degrees,  Plane  dB,  Cross  dB
 :
 :
 :
 Hub  HP  Entry  Title,  #  of  Value  Sets
 Degrees  of  Azimuth,  Plane  Polarized  dB,  &  Cross  Polarized  dB  Headings
 000  Degrees,  Plane  dB,  Cross  dB
 001  Degrees,  Plane  dB,  Cross  dB
 002  Degrees,  Plane  dB,  Cross  dB
 003  Degrees,  Plane  dB,  Cross  dB
 :
 :
 356  Degrees,  Plane  dB,  Cross  dB
 357  Degrees,  Plane  dB,  Cross  dB
 358  Degrees,  Plane  dB,  Cross  dB
 359  Degrees,  Plane  dB,  Cross  dB
 Degrees  of  Elevation,  Plane  Polarized  dB,  &  Cross  Polarized  dB  Headings
 -90  Degrees,  Plane  dB,  Cross  dB
 -89  Degrees,  Plane  dB,  Cross  dB
 -88  Degrees,  Plane  dB,  Cross  dB
 -87  Degrees,  Plane  dB,  Cross  dB
 :
 -01  Degrees,  Plane  dB,  Cross  dB
 000  Degrees,  Plane  dB,  Cross  dB
 +01  Degrees,  Plane  dB,  Cross  dB
 :
31
 Version  1.29  D-  32  April  21,  2000
 +87  Degrees,  Plane  dB,  Cross  dB
 +88  Degrees,  Plane  dB,  Cross  dB
 +89  Degrees,  Plane  dB,  Cross  dB
 +90  Degrees,  Plane  dB,  Cross  dB
 Response  01  Entry  Title
 Degrees  of  Azimuth,  Plane  Polarized  dB,  &  Cross  Polarized  dB  Headings
 000  Degrees,  Plane  dB,  Cross  dB
 001  Degrees,  Plane  dB,  Cross  dB
 002  Degrees,  Plane  dB,  Cross  dB
 003  Degrees,  Plane  dB,  Cross  dB
 :
 :
 356  Degrees,  Plane  dB,  Cross  dB
 357  Degrees,  Plane  dB,  Cross  dB
 358  Degrees,  Plane  dB,  Cross  dB
 359  Degrees,  Plane  dB,  Cross  dB
 Response  02  Entry  Title
 Degrees  of  Azimuth,  Plane  Polarized  dB,  &  Cross  Polarized  dB  Headings
 000  Degrees,  Plane  dB,  Cross  dB
 001  Degrees,  Plane  dB,  Cross  dB
 002  Degrees,  Plane  dB,  Cross  dB
 003  Degrees,  Plane  dB,  Cross  dB
 :
 :
 356  Degrees,  Plane  dB,  Cross  dB
 357  Degrees,  Plane  dB,  Cross  dB
 358  Degrees,  Plane  dB,  Cross  dB
 359  Degrees,  Plane  dB,  Cross  dB
 :
 :
 :
 Response  RP  Entry  Title
 Degrees  of  Azimuth,  Plane  Polarized  dB,  &  Cross  Polarized  dB  Headings
 000  Degrees,  Plane  dB,  Cross  dB
 001  Degrees,  Plane  dB,  Cross  dB
 002  Degrees,  Plane  dB,  Cross  dB
 003  Degrees,  Plane  dB,  Cross  dB
 :
 :
 356  Degrees,  Plane  dB,  Cross  dB
 357  Degrees,  Plane  dB,  Cross  dB
 358  Degrees,  Plane  dB,  Cross  dB
 359  Degrees,  Plane  dB,  Cross  dB
32
 Version  1.29  D-  33  April  21,  2000
 108.  The  hub  receiving  antenna  and  response  station  transmitting  antenna  azimuth  patterns  shall
 be  defined  in  1  degree  increments  beginning  with  0  degrees  and  ending  at  359  degrees.  Hub
 receiving  antenna  elevation  patterns  shall  be  defined  in  1  degree  increments  beginning  at  90
 degrees  for  the  zenith,  continuing  through  0  degrees  at  the  reference  horizontal  plane,  and  ending
 at  +90  degrees  for  the  nadir.  All  entries  shall  be  in  dB  relative  to  the  peak  response,  which  shall
 be  normalized  to  a  value  of  0  dB.  .  The  peak  response  in  the  azimuth  pattern  shall  be  given  at  0
 degrees  if  there  is  only  one  peak,  or  the  peaks  shall  be  symmetrically  placed  around  0  degrees  if
 there  is  more  than  one  peak.  The  elevation  pattern  shall  be  given  in  the  direction  of  the  azimuth
 plane  peak  response,  and  the  peak  elevation  response  shall  be  shown  at  the  depression  angle
 below  the  reference  horizontal  plane  at  which  it  occurs,  i.  e.  electrical  beam  tilt  shall  be  built  into
 the  elevation  pattern.  Any  rotations  of  the  antenna  pattern,  either  in  azimuth  or  through
 mechanical  beam  tilt,  are  given  in  other  sections.
 109.  Full  azimuth  data  shall  be  supplied  for  both  hub  and  response  station  worst-  case  antenna
 patterns.  Elevation  data  is  required  only  for  hub  antennas.  In  cases  where  hub  antenna  elevation
 data  is  known  only  over  a  limited  range,  just  the  known  points  should  be  entered.  For  example,  if
 elevation  data  is  known  from  10  degrees  to  +40  degrees  of  elevation  only,  such  data  should  be
 entered,  even  though  incomplete.  At  a  minimum,  data  shall  be  supplied  for  elevation  angles  every
 degree  from  10  degrees  to  +  30  degrees.  Where  mechanical  beam  tilt  is  used,  sufficient  data
 shall  be  supplied  to  assure  pattern  inclusion  to  at  least  5  degrees  above  the  horizon  (i.  e.,  -5
 degrees  relative  to  the  horizontal  plane  at  the  hub  antenna  location).  Only  those  angles  for  which
 data  is  present  should  appear  in  the  list,  and  the  total  number  of  value  sets  for  each  hub  antenna
 pattern  should  be  set  to  account  for  just  those  entries  present.  Headings  shall  not  be  counted  in
 arriving  at  the  total  number.  Where  needed  to  properly  model  an  antenna  for  which  all  values  of
 the  elevation  pattern  are  not  given,  values  not  given  shall  be  interpolated  linearly  in  decibels
 between  points  for  which  data  is  given,  using  the  sum  (in  decibels)  of  the  azimuth  and  elevation
 patterns  to  arrive  at  the  values  between  which  interpolation  shall  be  carried  out.
 110.  When  response  stations  operate  with  EIRP  no  greater  than  6  dBW  per  6  MHz  channel  (  or
 the  bandwidth-  adjusted  equivalent  on  a  power  spectral  density  basis),  they  are  permitted  to  use
 non-  directional  antennas.  Such  stations  shall  be  treated  as  using  isotropic  radiators,  which  shall
 be  indicated  by  use  of  the  value  1  for  the  worst-  case  antenna  pattern  number  in  the  section  on
 Class  Info.  No  specification  of  the  azimuth  pattern  of  such  an  antenna  is  required  in  the  section
 on  Antenna  Patterns.
 Example  File  &  Template
 111.  In  the  example  file  and  template  below,  formatting  elements  and  descriptive  terms  to  be
 included  in  the  submitted  file  exactly  as  shown  are  in  plain  text.  Those  items  to  be  replaced
 by  real  data  and  shown  here  as  placeholders  for  purposes  of  example  are  shown  in  italicized
 text  and  CAPITAL  LETTERS.
 [General  Info]
 File  FILE  NUMBER
 Licensee  OR  Applicant  LICENSEE/  APPLICANT  NAME
 Hub  Lat  DDMMSSS,  Hub  Lon  DDDMMSSS
33
 Version  1.29  D-  34  April  21,  2000
 Hub  City  CITY,  ST
 Elevation  AMSL  METERS
 Call  CALL  SIGN
 Stn  City  CITY,  ST
 [Circular  Geographic  Areas]
 RSA  0/  1,  Regions  00/  RR
 00,  DDMMSSS,  DDDMMSSS,  KM.  KM
 01,  DDMMSSS,  DDDMMSSS,  KM.  KM
 02,  DDMMSSS,  DDDMMSSS,  KM.  KM
 ::  ::::::  :::::::  ::::::
 ::  ::::::  :::::::  ::::::
 RR,  DDMMSSS,  DDDMMSSS,  KM.  KM
 [Non-  Circular  Areas]
 RSA  0/  1,  Regions  00/  NN
 RSA,  XXX
 DDMMSSS,  DDDMMSSS
 DDMMSSS,  DDDMMSSS
 DDMMSSS,  DDDMMSSS
 :::::::  ::::::::
 DDMMSSS,  DDDMMSSS  [Pair  #  XXX]
 Region  RR+  1,  AAA
 DDMMSSS,  DDDMMSSS
 DDMMSSS,  DDDMMSSS
 DDMMSSS,  DDDMMSSS
 :::::::  ::::::::
 DDMMSSS,  DDDMMSSS  [Pair  #  AAA]
 Region  RR+  2,  BBB
 DDMMSSS,  DDDMMSSS
 DDMMSSS,  DDDMMSSS
 DDMMSSS,  DDDMMSSS
 :::::::  ::::::::
 DDMMSSS,  DDDMMSSS  [Pair  #  BBB]
 :::::::  ::::::::
 :::::::  ::::::::
 Region  RR+  NN,  ZZZ
 DDMMSSS,  DDDMMSSS
 DDMMSSS,  DDDMMSSS
 DDMMSSS,  DDDMMSSS
 :::::::  ::::::::
 DDMMSSS,  DDDMMSSS  [Pair  #  ZZZ]
 [Sectorization]
 Sectors  SS
 Sector,  HubPat,  Gain,  Az,  AGL,  MTilt,  MTiltAz,  Pol,  Max#  Trans
 01,  HP,  dB.  dB,  DDD.  D,  MMMM,  DD.  D,  DDD.  D,  H/  V/  B,  TTTT
 02,  HP,  dB.  dB,  DDD.  D,  MMMM,  DD.  D,  DDD.  D,  H/  V/  B,  TTTT
 03,  HP,  dB.  dB,  DDD.  D,  MMMM,  DD.  D,  DDD.  D,  H/  V/  B,  TTTT
 ::  ::  ::  ::  :::  :  ::::  ::  :  :::  :  :  :  :  ::::
 ::  ::  ::  ::  :::  :  ::::  ::  :  :::  :  :  :  :  ::::
 SS,  HP,  dB.  dB,  DDD.  D,  MMMM,  DD.  D,  DDD.  D,  H/  V/  B,  TTTT
 [Grid  Points]
34
 Version  1.29  D-  35  April  21,  2000
 Points  MMMM
 Pnt,  Lat,  Lon,  Elev,  Regn,  Bearing,  Pol,#  Classes,  ClassDesignators...
 0001,  DDMMSSS,  DDDMMSSS,  MMMM,  R#,  DDD.  DD,  H/  V/  B,###,  CC1,  CC2,  CC3,...  CC###
 0002,  DDMMSSS,  DDDMMSSS,  MMMM,  R#,  DDD.  DD,  H/  V/  B,###,  CC1,  CC2,  CC3,...  CC###
 0003,  DDMMSSS,  DDDMMSSS,  MMMM,  R#,  DDD.  DD,  H/  V/  B,###,  CC1,  CC2,  CC3,...  CC###
 ::::  ::::::  :::::::  ::  ::  ::::  :  :  :  :::  :::  :::  :::  :::
 ::::  ::::::  :::::::  ::  ::  ::::  :  :  :  :::  :::  :::  :::  :::
 MMMM,  DDMMSSS,  DDDMMSSS,  MMMM,  R#,  DDD.  DD,  H/  V/  B,###,  CC1,  CC2,  CC3,...  CC###
 [Sector  Definitions]
 Sectors  SS,  Type  B
 01,  DD.  DD,  DD.  DD
 02,  DD.  DD,  DD.  DD
 03,  DD.  DD,  DD.  DD
 ::  ::  ::  ::  ::
 ::  ::  ::  ::  ::
 SS,  DD.  DD,  DD.  DD
 OR
 Sectors  SS,  Type  C
 Sector  01,  Points  AAA
 DDMMSSS,  DDDMMSSS
 DDMMSSS,  DDDMMSSS
 DDMMSSS,  DDDMMSSS
 :::::::  ::::::::
 DDMMSSS,  DDDMMSSS  [Pair  #  AAA]
 Sector  02,  Points  BBB
 DDMMSSS,  DDDMMSSS
 DDMMSSS,  DDDMMSSS
 DDMMSSS,  DDDMMSSS
 :::::::  ::::::::
 DDMMSSS,  DDDMMSSS  [Pair  #  BBB]
 Sector  03,  Points  CCC
 DDMMSSS,  DDDMMSSS
 DDMMSSS,  DDDMMSSS
 DDMMSSS,  DDDMMSSS
 :::::::  ::::::::
 DDMMSSS,  DDDMMSSS  [Pair  #  CCC]
 :::::::  ::::::::
 :::::::  ::::::::
 Sector  SS,  Points  ZZZ
 DDMMSSS,  DDDMMSSS
 DDMMSSS,  DDDMMSSS
 DDMMSSS,  DDDMMSSS
 :::::::  ::::::::
 DDMMSSS,  DDDMMSSS  [Pair  #  ZZZ]
 [Frequency  Plan]
 Sectors  SS
 Sector  01,  Response  Bands  R1
 D1,  FFFF.  FFF,  FFFF.  FFF
 D2,  FFFF.  FFF,  FFFF.  FFF
 D3,  FFFF.  FFF,  FFFF.  FFF
35
 Version  1.29  D-  36  April  21,  2000
 ::  ::::  :::  ::::  :::
 R1,  FFFF.  FFF,  FFFF.  FFF
 Sector  02,  Response  Bands  R2
 D1,  FFFF.  FFF,  FFFF.  FFF
 D2,  FFFF.  FFF,  FFFF.  FFF
 D3,  FFFF.  FFF,  FFFF.  FFF
 ::  ::::  :::  ::::  :::
 R2,  FFFF.  FFF,  FFFF.  FFF
 ::  ::::  :::  ::::  :::
 ::  ::::  :::  ::::  :::
 Sector  SS,  Response  Bands  RS
 D1,  FFFF.  FFF,  FFFF.  FFF
 D2,  FFFF.  FFF,  FFFF.  FFF
 D3,  FFFF.  FFF,  FFFF.  FFF
 ::  ::::  :::  ::::  :::
 RS,  FFFF.  FFF,  FFFF.  FFF
 [Class  Info]
 Classes  CL
 Class,  Pattern,  AGL,  MaxEIRP,#  Reg,  Reg,  Max#  Tx
 01,  PAT,  MMM,  dB.  dB,##,  R1,##  R1,  R2,##  R2,...  RG,##  RG
 02,  PAT,  MMM,  dB.  dB,##,  R1,##  R1,  R2,##  R2,...  RG,##  RG
 03,  PAT,  MMM,  dB.  dB,##,  R1,##  R1,  R2,##  R2,...  RG,##  RG
 ::  :::  :::  ::  ::  ::  ::  ::::  ::  ::::  ::  ::::
 ::  :::  :::  ::  ::  ::  ::  ::::  ::  ::::  ::  ::::
 CL,  PAT,  MMM,  dB.  dB,##,  R1,##  R1,  R2,##  R2,...  RG,##  RG
 [Antenna  Patterns]
 Hub  HP,  Response  RP
 Hub  01,  ###  Values
 DegAz,  Plane  dB,  Cross  dB
 000,  dB.  dB,  dB.  dB
 001,  dB.  dB,  dB.  dB
 002,  dB.  dB,  dB.  dB
 003,  dB.  dB,  dB.  dB
 :::  ::  ::  ::  ::
 :::  ::  ::  ::  ::
 357,  dB.  dB,  dB.  dB
 358,  dB.  dB,  dB.  dB
 359,  dB.  dB,  dB.  dB
 DegEl,  Plane  dB,  Cross  dB
 -90,  dB.  dB,  dB.  dB
 -89,  dB.  dB,  dB.  dB
 -88,  dB.  dB,  dB.  dB
 :::  ::  ::  ::  ::
 -01,  dB.  dB,  dB.  dB
 000,  dB.  dB,  dB.  dB
 +01,  dB.  dB,  dB.  dB
 :::  ::  ::  ::  ::
 +88,  dB.  dB,  dB.  dB
 +89,  dB.  dB,  dB.  dB
 +90,  dB.  dB,  dB.  dB
 Hub  02,  ###  Values
 DegAz,  Plane  dB,  Cross  dB
 000,  dB.  dB,  dB.  dB
36
 Version  1.29  D-  37  April  21,  2000
 001,  dB.  dB,  dB.  dB
 002,  dB.  dB,  dB.  dB
 003,  dB.  dB,  dB.  dB
 :::  ::  ::  ::  ::
 :::  ::  ::  ::  ::
 357,  dB.  dB,  dB.  dB
 358,  dB.  dB,  dB.  dB
 359,  dB.  dB,  dB.  dB
 DegEl,  Plane  dB,  Cross  dB
 -90,  dB.  dB,  dB.  dB
 -89,  dB.  dB,  dB.  dB
 -88,  dB.  dB,  dB.  dB
 :::  ::  ::  ::  ::
 -01,  dB.  dB,  dB.  dB
 000,  dB.  dB,  dB.  dB
 +01,  dB.  dB,  dB.  dB
 :::  ::  ::  ::  ::
 +88,  dB.  dB,  dB.  dB
 +89,  dB.  dB,  dB.  dB
 +90,  dB.  dB,  dB.  dB
 :::  ::  ::  ::  ::
 :::  ::  ::  ::  ::
 Hub  HP,  ###  Values
 DegAz,  Plane  dB,  Cross  dB
 000,  dB.  dB,  dB.  dB
 001,  dB.  dB,  dB.  dB
 002,  dB.  dB,  dB.  dB
 003,  dB.  dB,  dB.  dB
 :::  ::  ::  ::  ::
 :::  ::  ::  ::  ::
 357,  dB.  dB,  dB.  dB
 358,  dB.  dB,  dB.  dB
 359,  dB.  dB,  dB.  dB
 DegEl,  Plane  dB,  Cross  dB
 -90,  dB.  dB,  dB.  dB
 -89,  dB.  dB,  dB.  dB
 -88,  dB.  dB,  dB.  dB
 :::  ::  ::  ::  ::
 -01,  dB.  dB,  dB.  dB
 000,  dB.  dB,  dB.  dB
 +01,  dB.  dB,  dB.  dB
 :::  ::  ::  ::  ::
 +88,  dB.  dB,  dB.  dB
 +89,  dB.  dB,  dB.  dB
 +90,  dB.  dB,  dB.  dB
 Response  01
 DegAz,  Plane  dB,  Cross  dB
 000,  dB.  dB,  dB.  dB
 001,  dB.  dB,  dB.  dB
 002,  dB.  dB,  dB.  dB
 003,  dB.  dB,  dB.  dB
 :::  ::  ::  ::  ::
 :::  ::  ::  ::  ::
 357,  dB.  dB,  dB.  dB
 358,  dB.  dB,  dB.  dB
 359,  dB.  dB,  dB.  dB
37
 Version  1.29  D-  38  April  21,  2000
 Response  02
 DegAz,  Plane  dB,  Cross  dB
 000,  dB.  dB,  dB.  dB
 001,  dB.  dB,  dB.  dB
 002,  dB.  dB,  dB.  dB
 003,  dB.  dB,  dB.  dB
 :::  ::  ::  ::  ::
 :::  ::  ::  ::  ::
 357,  dB.  dB,  dB.  dB
 358,  dB.  dB,  dB.  dB
 359,  dB.  dB,  dB.  dB
 :::  ::  ::  ::  ::
 :::  ::  ::  ::  ::
 Response  RP
 DegAz,  Plane  dB,  Cross  dB
 000,  dB.  dB,  dB.  dB
 001,  dB.  dB,  dB.  dB
 002,  dB.  dB,  dB.  dB
 003,  dB.  dB,  dB.  dB
 :::  ::  ::  ::  ::
 :::  ::  ::  ::  ::
 357,  dB.  dB,  dB.  dB
 358,  dB.  dB,  dB.  dB
 359,  dB.  dB,  dB.  dB
38