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 PUBLIC  NOTICE  Federal  Communications  Commission  445  12  th  St.,  S.  W.  Washington,  D.  C.  20554  News  Media  Information  202  /  418-  0500  Fax-  On-  Demand  202  /  418-  2830  TTY  202  /  418-  2555  Internet:  http://  www.  fcc.  gov  ftp.  fcc.  gov
 DA  02-  885
 April  17,  2002
 THE  FCC'S  ADVISORY  COMMITTEE  FOR  THE  2003  WORLD  RADIOCOMMUNICATION  CONFERENCE  APPROVES
 DRAFT  PROPOSAL
 On  April  4,  2002,  the  World  Radiocommunication  Conference  Advisory  Committee  (WRC-  03  Advisory  Committee)  adopted  a  recommendation  to  the  Commission  on  an  issue  that  the  2003  World  Radio-communication
 Conference  (WRC-  03)  will  address.  The  WRC-  03  Advisory  Committee  was  established  by  the  Commission  in  January  2001  to  assist  it  in  the  development  of  proposals  for  WRC-  03.  To  that  end,  the  WRC-03
 Advisory  Committee  has  forwarded  the  recommendations  it  has  developed  since  the  beginning  of  2001  to  the  Commission  for  consideration.  We  have  attached  to  this  Public  Notice  the  WRC-  03  Advisory  Committees
 recommendation,  which  is  in  the  form  of  recommended  draft  proposal  to  the  WRC-  03.  We  appreciate  the  substantial  amount  of  work  that  the  WRC-  03  Advisory  Committee  has  put  into  developing  its  recommendation.
 This  Public  Notice  requests  comments  on  this  recommendation.
 Based  upon  our  initial  review  of  the  recommendation  forwarded  to  the  Commission,  the  International  Bureau,  in  coordination  with  other  Commission  Bureaus  and  Offices,  tentatively  concludes  that  we  can  generally  support
 the  proposal  recommended  by  the  WRC-  03  Advisory  Committee.  We  seek  comment  on  this  recommendation  that  appears  in  the  WRC-  03  Advisory  Committee  document  and  on  our  tentative  conclusion.
 In  addition,  the  National  Telecommunications  and  Information  Administration  (NTIA)  has  submitted  letters  to  the  Commission  containing  draft  proposals  that  have  been  developed  by  the  Executive  Branch  Agencies.  We
 also  request  comment  on  these  draft  proposals,  which  are  attached  hereto  as  well.
 The  FCC  will  consider  the  draft  proposals  and  comments  provided  in  its  upcoming  consultations  with  the  U.  S.  Department  of  State  and  NTIA  in  the  development  of  U.  S.  proposals  to  WRC-  03.  Once  agreed  by  these
 agencies  of  the  U.  S.  Government,  proposals  will  be  used  by  U.  S.  delegations  at  bilateral,  regional  and  international  meetings.  The  draft  proposals  attached  to  this  Public  Notice  may  evolve  as  we  approach  WRC-  03
 and  during  the  course  of  interagency  discussions.  Therefore,  they  do  not  constitute  the  final  national  position  on  these  issues.
 The  complete  texts  of  these  draft  proposals  are  also  available  in  the  FCC's  Information  Reference  Center,  Room  CY-  A257,  445  12th  Street,  SW,  Washington,  DC  20554  and  by  accessing  the  FCC's  WRC-  03  world  wide  web
 site  at  http://  www.  fcc.  gov/  wrc-  03.  To  comment  on  the  proposals,  please  submit  an  original  and  one  copy  of  your  comments  to  the  Office  of  the  Secretary,  Federal  Communications  Commission,  445  12th  Street,  SW,
 Washington,  DC  20554  and  provide  a  courtesy  copy  to  Alex  Roytblat,  FCC  WRC-  03  Director,  Room  6-  B505.  When  possible,  these  comments  should  also  be  forwarded  to  the  Commission  via  the  Internet  at:
 wrc03@  fcc.  gov.  Comments  should  refer  to  specific  proposals  by  document  number.  The  deadline  for  comments  on  the  draft  proposals  and  NTIA  letters  is  May  10,  2002.
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 I.  Informal  Working  Group  6:  Public  Protection  and  Other  Issues
 DRAFT  PROPOSAL  FOR  THE  WORK  OF  THE  CONFERENCE
 Doc.  WAC/  100(  04.04.02)
 (Originated  by  NTIA  and  approved  by  Informal  Working  Group  6)
 WRC-  2003  Agenda  Item  1.2:  to  review  and  take  action,  as  required,  on  No.  S5.134  and  related  Resolutions  517  (Rev.  WRC-  97)  and  537  (WRC-  97)  and  Recommendations  515  (Rev.  WRC-  97),
 517  (HFBC-  87),  519  (WARC-  92)  and  Appendix  S11,  in  light  of  the  studies  and  actions  set  out  therein,  having  particular  regard  to  the  advancement  of  new  modulation  techniques,  including
 digital  techniques,  capable  of  providing  an  optimum  balance  between  sound  quality,  bandwidth  and  circuit  reliability  in  the  use  of  the  HF  bands  allocated  to  the  broadcasting  service;
 ISSUE:  Introduction  of  digital  sound  broadcasting  below  30  MHz
 Background  Information:  This  agenda  item  is  directed  towards  the  operational  use  of  digital  modulation  techniques  for  broadcasting  in  the  HF  bands.  There  has  been  sufficient  progress  in  ITU-R
 SG  6,  so  that  the  digital  modulation  techniques  to  be  considered  under  this  agenda  item  are  limited  to  just  the  digital  modulation  techniques  recommended  in  Recommendation  ITU-  R
 BS.  1514.  WRC-  2003  will  therefore  be  fully  competent  to  set  any  necessary  conditions  for  introducing  these  digitally  modulated  emissions  to  the  HF  bands  allocated  to  broadcasting.
 The  collection  of  all  the  articles,  resolutions  and  recommendations  listed  in  the  agenda  item  text  are  the  ones  that  will  need  to  be  reviewed  for  suppression  or  modification  in  the  light  of  the  progress
 that  has  been  made  in  the  intervening  years  for  digital  modulation  use  in  the  HF  broadcasting  bands.  To  complete  the  overall  need,  some  additions  will  have  to  be  made.  The  suppressions,
 modifications  and  additions  that  are  incorporated  in  the  U.  S.  proposal  form  an  integrated  package  that  deals  in  an  efficient  manner  with  all  the  aspects  of  the  consequent  needs  connected  with  this
 non-  allocation  agenda  item.  By  and  large,  the  specific  wording  of  these  suggested  changes  are  those  that  were  developed  within  the  ITU-  Rs  Study  Group  6  at  its  WP6E  meetings  during  2001.
 Recommendation  ITU-  R  BS.  1514,  mentioned  above,  is  a  system  recommendation,  wherein  the  acceptable  digital  modulation  techniques  are  recorded.  The  development  and  testing  of  this
 modulation,  including  its  various  modes  associated  with  different  levels  of  robustness  and  audio  quality,  has  brought  the  techniques  close  to  consumer  product  status.  It  is  expected  that  by  the  end
 of  2003,  or  not  long  thereafter,  there  will  be  on  the  market  receivers  that  include  a  HF  digital  capability.  In  addition,  modern  HF  transmitters  can  accept  these  digital  signal  inputs.
 It  is  because  of  this  progress  that  this  agenda  item  and  this  proposal  exist  --  and,  without  diminishing  broadcaster  and  listener  access  to  traditional  amplitude  modulation,  simply  permits
 digital  modulation  in  the  mix  of  acceptable  and  available  listening.
 Furthermore,  since  the  introduction  of  digital  modulation  for  operational  use  is  two  years  or  so  from  2002,  the  proposed  modifications  to  existing  articles,  resolutions  and  recommendations  treat  all  HF
 broadcasting  bands  on  an  equal  footing.  There  is  no  longer  any  compelling  reason  to  separate  the  conditions  of  use  of  the  WARC-  92  bands  from  the  other  HF  broadcasting  bands.  The  solution
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 proposed  is  to  modify  Article  footnote  S5.134  so  that  any  ITU-  R  approved  amplitude  modulation  or  digital  modulation  can  be  broadcast  in  the  WARC-  92  bands  after  1  April  2007.  Before  that  time,
 the  proposal  is  not  to  permit  broadcasting  in  these  bands,  other  than  on  a  non-  harmful  interference  basis  (as  is  the  current  situation  using  S4.4).
 Three  resolutions  and  recommendations  are  proposed  to  be  suppressed  since  they  are  no  longer  relevant.  They  are  noted  at  the  end  of  the  proposal,  with  appropriate  reasons.
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 Proposals:
 USA/  /1  MOD
 RESOLUTION  517  (Rev.  WRC-  03)  (Rev.  WRC-  97)
 Introduction  of  digitally  modulated  and  single-  sideband  emissionsTransition  from  double-  sideband  to  single-  sideband  or  other  spectrum-  efficient  modulation
 techniques  in  the  high-  frequency  bands  between  5  900  KHz  and  26  100  KHz  allocated  to  the  broadcasting  service
 The  World  Radiocommunication  Conference  (Caracas,  19972003),
 considering
 a)  that  digital  techniques  are  being  introduced  into  many  existing  servicesthe  high-  frequency  (HF)  bands  allocated  to  the  broadcasting  service  between  5  900  kHz  and  26  100  kHz  are  severely
 congested;
 b)  that  digital  and  single-  sideband  (SSB)  techniques  allow  more  efficient  effective  utilization  of  the  frequency  spectrum  than  double-  sideband  (DSB)  techniques;
 c)  that  digital  and  SSB  techniques  enable  reception  quality  to  be  improved;
 d)  that  Recommendation  515  (Rev.  WRC-  97)  encourages  the  accelerated  design  and  manufacture  of  SSB  transmitters  and  receivers;
 ed)  Appendix  S11  concerning  the  Digital  and  SSB  system  specifications  in  the  HF  broadcasting  services;
 f)  that  rapid  developments  are  taking  place  in  digital  sound  broadcasting  technologies;
 e)  that  ITU-  R  in  its  Recommendation  ITU-  R  BS.  1514  has  recommended  system  characteristics  for  digital  sound  broadcasts  in  the  broadcast  bands  below  30  MHz;
 gf)  that  digital  modulation  or  other  spectrum-  efficient  modulation  techniques  are  expected  to  provide  the  means  to  achieve  the  optimum  balance  between  sound  quality,  circuit  reliability  and
 bandwidth;
 hg)  that  digitally  modulated  emissions  can,  in  general,  provide  more  efficient  coverage  than  amplitude-  modulated  transmissions  by  using  fewer  simultaneous  frequencies  and  less  power;
 i)  that  the  lifetime  of  a  transmitter  is  at  least  twenty  years;
 jh)  that  it  is  economically  unattractive,  using  current  technology,  to  convert  modern  existing  conventional  DSB  broadcasting  systems  to  SSB  digital  operation  in  accordance  with  considering
 d)  above;
 kj)  that  some  DSB  transmitters  have  been  used  with  digital  modulation  techniques  without  transmitter  modifications;
 l)  that  the  lifetime  of  a  receiver  is  of  the  order  of  ten  years;
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 mk)  that  ITU-  R  is  carrying  out  urgent  further  studies  on  the  development  of  broadcasting  using  digitally  modulatedion  emissions  in  the  bands  allocated  to  the  broadcasting  service  below  30  MHz;,
 n)  that  other  spectrum-  efficient  modulation  techniques  may  be  developed  in  the  future,
 resolves
 1  that  the  early  introduction  of  digitally  modulated  emissions  as  procedure  in  the  Annex  to  this  Resolution  shall  be  used  for  the  purpose  of  ensuring  an  orderly  transition  from  DSB  to  SSB  or
 other  spectrum-  efficient  modulation  techniques  recommended  by  ITU-  R  in  the  HF  bands  between  5  900  kHz  and  26  100  kHz  allocated  to  the  broadcasting  service  is  to  be  encouraged;
 2  that  digitally  modulated  and  SSB  emissions  shall  comply  with  the  characteristics  specified  in  Appendix  S11;
 3  that  whenever  an  administration  replaces  a  DSB  emission  by  an  emission  using  digital  or  SSB  modulation  techniques,  it  shall  ensure  that  the  level  of  interference  is  not  greater  than  that
 caused  by  the  original  DSB  emission,  and  shall  use  RF  Protection  values  specified  in  Recommendations  DAB  (WRC-  03)  and  517  (Rev.  WRC-  03);
 24  that  the  final  date  for  the  cessation  continued  use  of  DSB  emissions  specified  in  the  Annex  to  this  Resolution  shall  be  periodically  reviewed  by  a  competent  future  world  radiocommunication
 conferences  in  the  light  of  the  latest  available  complete  statistics  on  the  capability  of  administrations  to  introduce  digital  systems  worldwide  distribution  of  SSB  and  other  spectrum-efficient
 modulation  technique  transmitters  and  receivers,  as  called  for  in  Resolution  537  (WRC-97),
 instructs  the  Director  of  the  Radiocommunication  Bureau
 to  compile  and  maintain  the  statistics  referred  to  in  resolves  24,  to  make  these  statistics  available  to  administrations  and  to  submit  summaries  thereof  to  a  competent  future  world  radiocommunication
 conferences,
 invites  ITU-  R
 to  continue  its  studies  on  digital  techniques  in  HF  broadcasting  as  a  matter  of  urgency  with  a  view  to  assist  in  the  development  of  this  technology  for  future  use,
 invites  administrations
 1  to  assist  the  Director  of  the  Radiocommunication  Bureau  by  providing  the  relevant  statistical  data  and  to  participate  in  ITU-  R  studies  on  matters  relating  to  the  development  and
 introduction  of  digitally  modulated  emissions  transmissions  in  the  HF  bands  between  5  900  kHz  and  26  100  kHz  allocated  to  the  broadcasting  service.;
 2  to  bring  to  the  notice  of  transmitter  and  receiver  manufacturers  the  most  recent  results  of  relevant  ITU-  R  studies  on  spectrum-  efficient  modulation  techniques  suitable  for  use  at  HF  as  well
 as  the  information  referred  to  in  considerings  d)  and  e).
 Reasons:  The  changes  to  this  resolution  reflect  the  introduction  of  digital  and  SSB  emissions  and  the  consequent  need  to  protect  DSB  emissions  from  digital  and  single  sideband  emissions,  and  vice
 versa.  The  introduction  of  digital  emissions  does  not  substitute  for  single  sideband  emission  use.  The  resolution  has  been  modified  so  that  both  are  considered  on  an  equal  regulatory  footing.
 Several  modifications  made  in  the  considerings  are  a  consequence  of  digital  modulation  development  for  HF  broadcasting  since  WRC-  97.
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 USA/  /2  SUP
 ANNEX  TO  RESOLUTION  517  (REV.  WRC-  97)
 Reasons:  Due  to  the  modifications  to  Resolution  517  related  to  the  introduction  of  digital  and  SSB  emissions  and  deletion  of  the  requirement  of  the  transition  procedures,  this  annex  is  no  longer
 needed.  This  annex  deals  with  a  previous  idea  that  all  DSB  would  cease  after  2015.  The  complete  package  with  regard  to  this  agenda  item  considers  that  this  concept  of  cessation  of  one  of  the
 approved  modulation  methods  should  be  considered  by  a  future  competent  conference;  that  it  is  unrealistic  to  consider  ceasing  a  particular  type  of  modulation  without  any  concern  for  the  listener
 and  broadcaster  market  12  years  after  WRC-  03.
 USA/  /3  MOD
 APPENDIX  S11
 System  specifications  for  Double-  Sideband  (DSB),  and  Single-  Sideband  (SSB)  and  Digitally  Modulated  Emissions  System  Specifications  in  the  HF  Broadcasting  Service
 Reasons:  Updating  the  appendix  title  to  reflect  the  proposed  use.
 USA/  /4  NOC
 Double-  sideband  system  (DSB)
 Reasons:  The  current  text  is  adequate  as  written.
 PART  B  -  Single-  sideband  system  (SSB)
 1  SYSTEM  PARAMETERS
 USA/  /5  MOD
 1.1  Channel  spacing
 In  a  mixed  DSB,  SSB  and  Digital  environment  During  the  transition  period  (see  Resolution  517  (Rev.  WRC-  03  HFBC-  87)),  the  channel  spacing  shall  be  10  kHz.  In  the  interest  of  spectrum
 conservation,  during  the  transition  period,  it  is  also  permissible  to  interleave  SSB  emissions  midway  between  two  adjacent  DSB  channels,  i.  e.,  with  5  kHz  separation  between  carrier
 frequencies,  provided  that  the  interleaved  emission  is  not  to  the  same  geographical  area  as  either  of  the  emissions  between  which  it  is  interleaved.
 In  an  all  inclusive  SSB  environment,_  After  the  end  of  the  transition  period  the  channel  spacing  and  carrier  frequency  separation  shall  be  5  kHz.
 Reasons:  Updating  this  text  to  reflect  digital  and  SSB  use  and  deleting  text  concerning  the  transition  period.  No  change  in  the  carrier  reduction  levels.
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 USA/  /6  MOD
 2.6  Carrier  reduction  (relative  to  peak  envelope  power)
 In  a  mixed  DSB,  SSB  and  Digital  environment  During  the  transition  period  the  carrier  reduction  shall  be  6  dB  to  allow  SSB  emissions  to  be  received  by  conventional  DSB  receivers  with  envelope
 detection  without  significant  deterioration  of  the  reception  quality.
 In  an  all  inclusive  SSB  environment  At  the  end  of  the  transition  period,  the  carrier  reduction  shall  be  12  dB.
 Reasons:  Updating  this  text  to  reflect  digital  and  SSB  use  and  deleting  text  concerning  the  transition  period.  No  change  in  the  carrier  reduction  levels.
 USA/  /7  ADD
 PART  C  -  Digital  system
 1  SYSTEM  PARAMETERS
 1.1  Channel  spacing
 The  initial  spacing  for  digitally  modulated  emissions  use  shall  be  10  kHz.  However,  interleaved  channels  with  a  separation  of  5  kHz  may  be  used  in  accordance  with  the  appropriate  protection
 criteria  appearing  in  Recommendation  DAB  (WRC-  03),  provided  that  the  interleaved  emission  is  not  to  the  same  geographical  area  as  either  of  the  emissions  between  which  it  is  interleaved.
 [1.2  Channel  utilisation
 Channels  using  digitally  modulated  emissions  may  be  commingled  with  analogue  emissions  in  the  same  HFBC  band  provided  the  protection  to  the  analogue  emissions  is  at  least  as  great  as  that  which
 currently  is  in  force  with  analogue-  to-  analogue  protection.  To  accomplish  this  may  require  that  the  digital  spectral  power  density  (and  total  power)  be  lower  by  several  dB  than  is  currently  used  for
 the  same  emission  circuit  using  either  DSB  or  SSB  emissions.
 2  EMISSION  CHARACTERISTICS
 2.1  Bandwidth  and  centre  frequency
 A  full  digitally  modulated  emission  will  have  a  10  kHz  bandwidth  with  its  centre  frequency  at  any  of  the  5  kHz  possibilities  within  the  HFBC  bands.
 There  are  simulcast  modes,  which  are  a  combination  of  analogue  and  digital  emissions  of  the  same  programme  in  the  same  channel,  that  may  use  a  digital  emission  of  5  kHz  or  10  kHz
 bandwidth,  next  to  either  a  5  kHz  or  10  kHz  analogue  emission.  In  all  cases  of  this  type,  the  5  kHz  interleaved  raster  used  in  HFBC  shall  be  adhered  to  in  placing  the  emission  within  the  HFBC
 bands.
 2.2  Frequency  tolerance
 To  be  entered  after  WP6E  determines  the  values  at  either  its  March  2002  or  September  2002  meeting.
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 2.3  Audio  frequency  band
 Digital  source  coding  within  a  10  kHz  bandwidth,  taking  account  of  the  need  for  various  levels  of  error  avoidance,  detection  and  correction  coding  emission  mitigation,  can  range  from  the  equivalent
 of  monophonic  FM  (approximately  15  kHz)  to  low  level  speech  codec  performance  of  the  order  of  3  kHz.  The  choice  of  audio  quality  is  connected  to  the  needs  of  the  broadcaster/  listener,  and
 includes  such  characteristics  to  consider  as  the  propagation  channel  conditions  expected.  There  is  no  single  specification,  only  the  upper  and  lower  bounds  noted  in  this  paragraph.
 2.4  Modulation
 Quadrature  amplitude  modulation  (QAM)  with  Orthogonal  frequency  division  multiplexing  (OFDM)  shall  be  used.  64  QAM  is  feasible  under  many  propagation  conditions;  factors  of  ,    and
 perhaps  1/  8  of  this  are  specified  for  use  when  needed.
 Reasons:  Part  C  is  added  to  address  the  requirements  of  digital  systems.  Specific  channelization  values,  audio  frequency  bandwidths  and  modes  of  digital  modulation  conform  to  ITU-  R  system
 Recommendation  BS.  1514.
 USA/  /8  ADD
 DRAFT  RECOMMENDATION  DAB  (WRC-  03)
 RF  protection  ratios  associated  with  digitally  modulated  emissions  in  the  HF  bands  allocated  exclusively  to  the  broadcasting  service
 The  World  Radiocommunication  Conference  (Caracas,  2003),
 considering
 a)  that  this  Conference  has  resolved  to  encourage  the  introduction  of  digitally  modulated  emissions  in  the  high  frequency  broadcast  bands  allocated  exclusively  to  the  broadcasting  service;
 b)  that  the  current  use  of  the  spectrum  is  based  on  the  use  of  double-  sideband  (DSB)  emissions;
 c)  that  RF  co-  channel  and  adjacent  channel  protection  ratios  are  among  the  fundamental  parameters  when  determining  compatibility;
 d)  that  this  Conference  has  adopted  Resolution  517  (Rev.  WRC-  03)  relating  to  the  introduction  of  digitally  modulated  emissions  in  the  HF  bands  allocated  exclusively  to  the
 broadcasting  service;
 e)  that  Part  C  of  Appendix  S11  contains  digital  system  specifications  that  refer  to  this  Recommendation  for  matters  dealing  with  appropriate  protection  ratios,
 recommends
 1  that  in  the  application  of  Article  S12,  the  protection  ratios  specified  in  the  Annex  to  this  Recommendation  be  used  for  all  those  cases  where  digitally  modulated  emissions  operate  in  the
 same  bands  as  double-  sideband  analogue  emissions.
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 2)  Values  for  a  BER  of  10  -4
 3)  Values  for  SSB  into  digital  and  digital  into  SSB  will  be  supplied  from  the  TG6/  7  meetings
 to  be  held  in  March  2002  and  September  2002
 Reasons:  This  annex  provides  the  appropriate  amounts  of  protection  given  to  both  analogue  and  digital  emissions  and  supports  the  text  of  DRAFT  RECOMMENDATION  DAB(  WRC-  03).
 USA/  /10  MOD
 RECOMMENDATION  517  (HFBC-  87REV.  WRC-  03)
 Relative  RF  protection  ratio  values  for  single-  sideband  (SSB)  emissions  in  the  HF  bands  allocated  exclusively  to  the  broadcasting  service
 The  World  Administrative  Radio  Radiocommunication  Conference  for  the  Planning  of  the  HF  Bands  Allocated  to  the  Broadcasting  Service  ([  Geneva]  2003,  1987),
 considering
 a)  that  WRC-  97  the  Conference  has  adopted  Article  S12  as  the  seasonal  a  method  for  the  planning  procedure  for  of  the  HF  bands  allocated  exclusively  to  the  broadcasting  service;
 b)  that  this  method  procedure  is  based  principally  on  the  use  of  double-  sideband  (DSB)  emissions;
 c)  that  the  RF  co-  channel  protection  ratio  is  one  of  the  fundamental  planning  parameters;
 d)  that  the  this  Conference  has  adopted  Resolution  517  (Rev.  WRC-  03)  relating  to  the  transition  introduction  of  digitally  modulated  and  from  DSB  to  SSB  emissions  in  the  HF  bands
 allocated  exclusively  to  the  broadcasting  service  and  Recommendation  515  relating  to  the  introduction  of  transmitters  and  receivers  capable  of  both  DSB  and  SSB  modes  of  operation;
 e)  that  the  SSB  system  characteristics  for  HF  broadcasting  are  contained  in  Appendix  S11;
 f)  that,  however,  due  to  their  provisional  nature,  the  values  of  the  relative  RF  protection  ratio  to  be  applied  for  all  relevant  combinations  of  wanted  and  unwanted  DSB  and  SSB  emissions  have
 not  been  included  in  the  Appendix  mentioned  in  considering  e);
 g)  that  preliminary  studies  have  shown  that  SSB  emissions  may  require  a  lower  RF  co-  channel  protection  ratio  for  the  same  reception  quality;
 h)  Resolution  514  (HFBC-  87)  *  relating  to  the  procedure  to  be  applied  by  the  Radio  Regulations  Board  and  the  Bureau  in  the  revision  of  relevant  parts  of  their  Technical  Standards
 used  for  HF  broadcasting,
 recommends
 that,  subject  to  the  procedure  to  be  applied  by  the  Radio  Regulations  Board  and  the  Bureau  in  the  revision  of  relevant  parts  of  their  Technical  Standards  used  for  HF  broadcasting  given  in
 *  This  Resolution  was  abrogated  by  WRC-  97.
10
 11
 Resolution  514  (HFBC-  87)  *  ,  the  values  of  relative  RF  protection  ratio  given  in  the  Annex  to  this  Recommendation  be  used  by  the  Bureau  in  its  application  of  Article  S12  Technical  Standards
 relating  to  SSB  and  DSB  emissions  in  the  HF  bands  allocated  exclusively  to  the  broadcasting  service,
 invites  the  ITU-  R
 to  continue  to  study  the  values  of  relative  RF  protection  ratio  for  the  different  cases  and  frequency  separations  covered  in  the  Annex  to  this  Recommendation,
 and  recommends  administrations
 to  participate  actively  in  these  studies.
 Reasons:  This  recommendation  has  been  modified  to  reflect  the  introduction  of  digital  emissions.  No  substantive  changes  were  made  in  the  protection  ration  values  with  SSB  vs.  DSB  amplitude
 modulation.
 USA/  /11  MOD
 ANNEX  TO  RECOMMENDATION  517  (HFBC-  87Rev.  WRC-  03)
 Relative  RF  protection  ratio  values
 1  The  values  of  relative  RF  protection  ratio  given  in  the  table  should  be  used  whenever  SSB  emissions  in  conformity  with  the  specification  in  Appendix  S11  are  involved  in  the  use  of  the  HF
 bands  allocated  exclusively  to  the  broadcasting  service.
 2  The  values  given  refer  to  the  case  of  co-  channel  DSB  wanted  and  unwanted  signals  for  the  same  reception  quality.
 32  For  the  reception  of  DSB  and  SSB  (6  dB  carrier  reduction  relative  to  peak  envelope  power)  wanted  signals,  a  conventional  DSB  receiver  with  envelope  detection  designed  for  a  channel
 spacing  of  10  kHz  is  assumed.
 43  For  the  reception  of  an  SSB  wanted  signal  (12  dB  carrier  reduction  relative  to  peak  envelope  power),  the  reference  receiver  as  specified  in  Appendix  S11,  Part  B,  Section  3,  is  assumed.
 54  SSB  signals  with  6  dB  carrier  reduction  relative  to  peak  envelope  power  assume  equivalent  sideband  power  as  specified  in  Appendix  S11,  Part  B,    1.2.
 65  The  figures  for  case  2  in  the  following  table  relate  to  a  situation  where  the  centre  frequency  of  the  intermediate  frequency  pass-  band  of  the  DSB  receiver  is  tuned  to  the  carrier  frequency  of  the
 wanted  SSB  signal.  If  this  is  not  the  case,  the  value  for  a  difference  of  +5  kHz  may  increase  to  1  dB.]
11
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 Releative  RF  protection  ratio  values  with  reference  to  the  co-  channel  RF  protection  ratio  for  DSB  wanted  and  unwanted  signals  (dB)  1  for  use  in  the  HF  bands
 allocated  exclusively  to  the  broadcasting  service
 1  Frequency  separation  f  less  than  20  kHz,  as  well  as  f  greater  than  20  kHz,  need  not  be  considered.
 Reasons:  Minor  text  changes  were  made  to  update  the  annex  from  HFBC-  87.  No  changes  were  made  in  the  DSB  vs.  SSB  table  of  protection  ratios.
 USA/  /12  MOD
 S5.134  The  use  of  the  bands  5  900-  5  950  kHz,  7  300-  7  350  kHz,  9  400-  9  500  kHz,  11  600-  11  650  kHz,  12  050-  12  100  kHz,  13  570-  13  600  kHz,  13  800-  13  870  kHz,
 15  600-  15  800  kHz,  17  480-  17  550  kHz  and  18  900-  19  020  kHz  byare  allocated  to  the  broadcasting  service  on  a  primary  basis  as  from  1  April  2007.is  limited  to  single  sideband  emissions  with  the
 characteristics  specified  in  Appendix  S11  or  to  any  other  spectrum  efficient  modulation  techniques  recommended  by  ITU-  R.  Access  to  these  bands  shall  be  subject  to  the  decisions  of  a  competent
 conference.
 Reasons:  The  proposed  modification  provides  a  simple  unambiguous  regulatory  environment  for  the  use  of  the  WARC-  92  extension  bands  both  before  and  after  the  envisaged  implementation  date
 of  1  April  2007.  Before  the  01/  04/  07  date,  there  is  no  change:  in  other  words,  the  bands  are  not  allocated  to  HFBC.  After  that  date,  broadcasters  can  choose  any  modulation  means  that  has  ITU-  R
 approval,  such  as  the  digital  modulation  described  in  ITU-  R  Recommendation  BS.  1514  and  the  SSB  and  DSB  amplitude  modulations  noted  in  Article  S11.
 USA/  /13  SUP
 RESOLUTION  537  (WRC-  97)
 Reasons:  The  survey  mentioned  in  the  resolution  on  transmitter  and  receiver  statistics  related  to  SSB  has  been  completed,  and  submitted  by  the  BR  for  WRC-  2000,  as  requested  from  WRC-  97.
 Therefore,  there  is  no  need  to  carry  forward  this  resolution.  The  associated  Recommendation  515  (Rev.  WRC-  97)  is  also  proposed  for  suppression  as  detailed  below.
 Wanted  signal  Unwanted  signal
 Carrier  frequency  separation  f  unwanted    f  wanted,  f  (kHz)
 20  15  10  5  0  +5  +10  +15  +20
 1  DSB  SSB  (6  dB  carrier  reduction  relative  to  p.  e.  p.)  51  46  32  +1  3  2  32  46  51
 2  SSB  (6  dB  carrier  reduction  relative  to  p.  e.  p.)  DSB  54  49  35  3  0  3  35  49  54
 3  SSB  (6  dB  carrier  reduction  relative  to  p.  e.  p.)  SSB  (6  dB  carrier  reduction  relative  to  p.  e.  p.)  51  46  32  +1  0  2  32  46  51
 4  SSB  (12  dB  carrier  reduction  relative  to  p.  e.  p.)  SSB  (12  dB  carrier  reduction  relative  to  p.  e.  p.)  57  57  57  45  0  20  47  52  57
12
 13
 USA/  /14  SUP
 RECOMMENDATION  515  (Rev.  WRC-  97)
 Reasons:  With  the  adoption  of  this  Recommendation  BS.  1514  and  the  fact  that  IEC  has  been  informed  of  this  development,  Recommendation  515  (Rev.  WRC-  97)  can  be  suppressed.
 USA/  /15  SUP
 RECOMMENDATION  519  (WARC-  92)
 Reasons:  This  Recommendation,  from  WARC-  92,  considers  the  possibility  of  advancing  the  date  of  cessation  of  DSB.  In  the  light  of  broadcasting  needs  in  HF,  this  is  totally  unrealistic.  Thus,  there
 is  concern  within  many  Administrations,  expressed  on  many  occasions  at  WRC-  97,  that  the  introduction  of  SSB  into  HF  Broadcasting  (and  now  digital  modulation)  should  not  restrict  the
 ability  of  administrations  to  continue  with  their  existing  DSB  transmissions  for  the  foreseeable  future  and  that  at  this  point  in  time  it  is  inappropriate  to  specify  a  cessation  of  DSB  in  favour  of
 SSB  in  the  year  2015.  It  is  also  evident  from  information  presented  at  WRC-  2000  by  the  Director  that  the  interest  in  SSB  within  HF  Broadcasting  is  virtually  non-  existent.  This  Recommendation
 should  therefore  be  suppressed.
 USA/  /16  MOD
 ARTICLE  S23.12
 Double  side  band  and  single  side  band  t  tTransmitting  stations  operating  in  the  HF  bands  allocated  exclusively  to  the  Broadcasting  Service  shall  meet  the  system  specifications  contained  in  Appendix
 S11.
 Reasons:  A  consequential  change  that  reflects  the  change  in  S11  that  has  added  digital  modulation  to  the  acceptable  modulation  methods.
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 II.  Draft  Proposals  Approved  by  the  National  Telecommunications  and  Information  Administration  (NTIA)
 DRAFT  PROPOSAL  FOR  THE  WORK  OF  THE  CONFERENCE
 Included  in  Doc.  WAC/  099(  04.04.02)
 Agenda  Item  1.12c:  to  consider  allocations  and  regulatory  issues  related  to  the  space  science  services  in  accordance  with  Resolution  723  (Rev.  WRC-  2000)  and  to  review  all  Earth  exploration-  satellite
 service  and  space  research  service  allocations  between  35  and  38  GHz,  taking  into  account  Resolution  730  (WRC-  2000);
 Background  Information:  Resolution  723  (Rev.  WRC-  2000)  resolves  4,  recommends  that  WRC-  03  consider  a  review  of  existing  allocations  to  space  science  services  near  15  GHz  and  26GHz,  with  a
 view  to  accommodating  wideband  space-  to-  Earth  space  research  applications.  This  resolves  is  in  response  to  a  need  for  allocations  to  support  planned  high  data  rate  space  research  missions  requiring
 bandwidths  up  to  400  MHz.  Satellites  for  these  missions  will  carry  telescopes  and/  or  other  passive  instruments  to  measure  phenomenon  such  as  the  Earth's  magnetosphere  and  solar  flares.  These
 missions  will  be  limited  in  number  with  an  estimated  three  to  five  satellites  per  year  worldwide,  and  will  generally  be  in  an  equatorial  orbit  with  some  at  geostationary  altitudes  and  others  at  the  L1  or  L2
 Sun/  Earth  equilibrium  libration  points  that  are  approximately  1.9  M  km  from  Earth.
 An  ITU-  R  study  has  shown  the  feasibility  of  using  the  band  25.5-  27.0  GHz  to  satisfy  the  requirements  described  above.  1  The  band  is  currently  allocated  to  the  fixed,  mobile,  inter-  satellite  and  Earth
 exploration-  satellite  services  on  a  primary  basis.  The  use  of  the  allocations  is  further  constrained  by  RR  footnotes:  S5.536  sets  conditions  on  the  use  of  the  band  by  stations  in  the  inter-  satellite  service
 (ISS);  S5.536A  limits  the  protection  afforded  EESS  earth  stations  from  the  emissions  of  stations  in  the  fixed  and  mobile  services;  and,  S5.536B  further  limits  the  protection  and  status  of  EESS  earth  stations
 in  a  number  of  countries.
 Proposal:  25.5-  27  GHz
 Allocation  to  Services  Region  1  Region  2  Region  3
 USA/  /1  MOD  25.  5-  27  EARTH  EXPLORATION-  SATELLITE  (space-  to  Earth)  S5.536A  S5.536B
 FIXED  INTER-  SATELLITE  S5.  536
 MOBILE  SPACE  RESEARCH  (space-  to-  Earth)
 Standard  frequency  and  time  signal-  satellite  (Earth-  to-  space)  MOD  S5.  536A
 Reasons:  To  add  a  primary  space  research  service  (space-  to-  Earth)  allocation  to  the  Table  of  Allocations  and  to  show  that  the  footnote  S5.  536A  will  apply  to  the  space  research  service  as  well  as  the  Earth  exploration-  satellite
 service.
 1  This  proposal  only  addresses  the  26  GHz  element  of  Agenda  Item  1.12c.  A  separate  proposal  will  address  the
 15  GHz  element  of  the  agenda  item.
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 USA/  /2  MOD
 S5.536A  Administrations  installing  Earth  exploration-  satellite  service  or  space  research  service  earth  stations  cannot  claim  protection  from  stations  in  the  fixed  and  mobile  services  operated  by
 neighbouring  administrations.  In  addition,  earth  stations  operating  in  the  Earth  exploration-  satellite  service  should  take  into  account  Recommendation  ITU-  R  SA.  1278.
 Reasons:  This  change  amends  RR  footnote  S5.536A  to  include  SRS  earth  stations  and  to  give  them  the  same  status  as  Earth  exploration-  satellite  service  earth  stations.
 Table  S21-  4
 Limit  in  dB(  W/  m2)  for  angle  of  arrival  ()  above  the  horizontal  plane  Service*
 0-  5  5-  25  25-  90
 Reference  bandwidth
 USA/  /3  MOD  25.  5-  27.0  GHz  Space  Research  (space-  to-  Earth)  -115  -115  +  (    5)/  2  -105  1  MHz
 Reasons:  These  changes  limit  the  emissions  of  the  space  research  service  in  order  to  protect  the  fixed  and  mobile  services  from  harmful  interference.
 APPENDIX  S7,  TABLE  8d
 Parameters  required  for  the  determination  of  coordination  distance  for  a  receiving  earth  station
 USA/  /4  MOD
 Receiving  space  radiocommunication
 service  designation
 space  research  (4)  space  research  (5)
 Frequency  band  (GHz)  25.5-  27.0  25.5-  27.0
 Transmitting  terrestrial  service  designations  Fixed,
 mobile  Fixed,  mobile
 Method  to  be  used    2.2    2.1
 Modulation  at  earth  station  (1)  N  N
 p0  (%)  0.  1  0.1
 Earth  station  n  2  2
 interference  p  (%)  0.  05  0.05
 parameters  NL  (dB)  0  0
 and  criteria  Ms  (dB)  6  6
 W  (dB)  0  0  E  (dBW)  A  -  -
 Terrestrial  in  B  (2)  N  42  42
 station  Pt  (dBW)  A  -  -
 parameters  in  B  N  3  3
 Gx  (dBi)  45  45
 Reference  bandwidth  B  (Hz)  10  6  10  6
 Permissible  interference
 power
 Pr  (  p)  (dBW)
 in  B
 150  150
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 USA/  /5  NOC
 (Notes  to  Table  8d)  (1)
 A:  analogue  modulation;  N:  digital  modulation.  (2)  E  is  defined  as  the  equivalent  isotropically  radiated  power  of  the  interfering  terrestrial  station  in  the  reference
 bandwidth.  (3)  Non-  geostationary  mobile-  satellite  service  feeder  links.
 (4)  Non-  geostationary-  satellite  systems.
 (5)  Geostationary-  satellite  systems.
 (6)  Non-  geostationary  fixed-  satellite  systems.
 Reasons:  Provides  the  characteristics  in  Table  8d  of  Appendix  S7  of  receiving  earth  stations  in  the  space  research  service  to  be  used  in  determining  the  coordination  contour  with  respect  to  transmitting
 stations  in  the  fixed  and  mobile  services.
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 DRAFT  PROPOSAL  FOR  THE  WORK  OF  THE  CONFERENCE
 Included  in  Doc.  WAC/  099(  04.04.02)
 Agenda  Item  1.14:  to  consider  measures  to  address  harmful  interference  in  the  bands  allocated  to  the  maritime  mobile  and  aeronautical  mobile  (R)  services,  taking  into  account  Resolutions  207
 (Rev.  WRC-  2000)  and  350(  WRC-  2000),  and  to  review  the  frequency  and  channel  arrangements  in  the  maritime  MF  and  HF  bands  concerning  the  use  of  new  digital  technology,  also  taking  into  account
 Resolution  347  (WRC-  97);
 Background  Information:  In  an  ongoing  effort  to  reduce  interference  to  HF  distress  and  safety  frequencies  used  in  the  GMDSS,  WRC-  2000  determined  that  after  31  December  2003,  general  calling
 should  not  be  permitted  on  channels  used  for  distress  and  safety  traffic.  The  radio  regulations  now  permit  routine  voice  calling  on  the  two  GMDSS  duplex  distress  and  safety  traffic  channels  in  the  12
 and  16  MHz  band.  WRC-  2000  actions  removed  the  calling  function  on  these  two  channels.  It  also  changed  these  duplex  channels  to  simplex  channels,  allocating  one  of  the  simplex  channels  for  routine
 calling  via  radiotelephone  and  the  other  as  dedicated  for  distress  and  safety  communications.  These  changes  are  scheduled  to  take  effect  31  December  2003.  This  change  will  result  in  a  financial  and
 personnel  impact  to  maritime  SAR  authorities  that  maintains  listening  watch  in  these  bands,  and  receives  occasional  routine  radiotelephone  calls  in  addition  to  distress  and  safety  calls.  Removal  of  the
 ability  of  shore  stations  that  have  search  and  rescue  responsibilities  to  receive  and  make  routine  calls  on  these  frequencies  will  result  in  the  receiving  of  distress  and  safety  calls  on  a  working  channel  not
 designated  for  distress  and  safety  purposes.  This  has  caused  some  confusion  to  mariners  wishing  to  send  distress  and  safety  calls.
 A  second  related  issue  involves  a  need  for  more  effective  methods  for  ships  and  coast  stations  to  call  ships  using  DSC  for  routine  communications.  ITU  Radio  Regulations  effectively  prohibit  ships  and
 coast  stations  from  making  routine  calls  to  other  ships  using  DSC,  and  other  alternatives  do  not  exist.  Channels  are  available  for  ships  making  routine  calls  to  coast  stations,  and  these  channels  should
 continue  to  be  used.  But  ships  do  not  guard  these  routine  calling  channels,  and  so  cannot  accept  routine  calls  from  coast  stations.  Simplex  HF  DSC  channels  allowing  routine  calls  from  other  ships  do
 not  exist,  and  experience  has  shown  that  the  number  of  such  calls  would  be  small,  and  should  not  interfere  with  the  distress  and  safety  uses  of  this  channel.
 Proposal:
 USA/  /  1
 MOD
 S52.221A  Calling  on  the  carrier  frequencies  12  290  kHz  and  16  420  kHz  shall  cease  as  soon  as  possible  and  no  later  than  31  December  2003  is  permitted  only  to  and  from  rescue  coordination  centres
 (see  No.  S30.6.1).  The  alternative  carrier  frequencies  12359  kHz  and  16  537  kHz  may  be  used  by  ship  stations  and  coast  stations  for  calling  on  a  simplex  basis,  provided  that  the  peak  envelope  power  does
 not  exceed  1  kW.
17
 18
 Reasons:  The  addition  in  this  footnote  permits  calling  to  and  from  stations  that  have  search  and  rescue  responsibilities,  i.  e.,  rescue  coordination  centres.  Because  of  the  very  limited  number  of  rescue
 coordination  centres  that  are,  or  plan  to  be,  operating  in  these  bands,  the  additional  traffic  and  potential  for  interfering  with  distress  and  safety  traffic  is  very  low.  Additionally,  this  allows  a  vessel  in  a
 distress  situation  to  communicate  on  these  channels  rather  than  making  a  distress  call  on  a  working  channel;  hence,  de  facto  changing  the  working  channel  into  the  distress  and  safety  channel.
 Monitoring  of  these  two  frequencies  at  the  US  Coast  Guard  Communications  Master  Stations  Atlantic  have  shown  very  little  traffic  on  these  channels.
 APPENDIX  S15
 TABLE  S15-  1
 Legend:
 USA/  /  2
 MOD
 DSC  These  frequencies  are  used  exclusively  for  distress  and  safety  calls  using  digital  selective  calling  in  accordance  with  No.  S32.5  (see  Nos.  S32.9,  S33.11  and  S33.34).  Exceptionally,  however
 these  frequencies  may  also  be  used  for  ship-  to-  ship  and  shore-  to-  ship  routine  calling  if  no  other  means  are  available  and  if  no  traffic  is  present  on  the  channel  (see  No.  S31.4).
 Reasons:  This  will  facilitate  communications  to  and  from  ships  that  are  outside  coverage  of  VHF  radiotelephone  frequencies,  where  no  other  means  of  DSC  calling  exist.  This  change  includes  the
 requirement  to  ensure  no  communications  is  present  before  making  a  routine  call.  It  allows  DSC-equipped  radios  to  meet  the  recommendations  of  IMO  that  GMDSS  equipment  not  be  reserved  for
 emergency  use  only,  as  described  in  IMO  COMSAR  Circ.  17.
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 19
 DRAFT  PROPOSAL  FOR  THE  WORK  OF  THE  CONFERENCE
 Included  in  Doc.  WAC/  101(  04.04.02)
 Agenda  Item  1.31:  to  consider  the  additional  allocations  to  the  mobile-  satellite  service  in  the  1-  3  GHz  band,  in  accordance  with  Resolutions  226  (WRC-  2000)  and  227  (WRC-  2000);
 Background  Information:  WRC-  2000  considered  proposals  for  worldwide  allocation  of  the  band  1  683-  1  690  MHz  to  the  mobile-  satellite  service  (MSS)  (Earth-  to-  space)  in  response  to  Resolution  213
 (WRC-  95).  The  frequency  band  1  675-  1  710  MHz  is  allocated  to  the  MSS  (Earth-  to-  space)  in  Region  2  on  a  co-  primary  basis.  However,  the  1  683-  1  690  MHz  portion  is  used  mainly  by  the  meteorological-satellite
 (MetSat)  and  meteorological  aids  (MetAids)  services.  While  there  are  only  a  limited  number  of  MetSat  earth  stations  operating  in  this  band  in  Region  1,  there  are  a  large  number  of  MetSat  earth
 stations  operating  in  Regions  2  and  3,  and  the  locations  of  many  of  these  stations  are  not  identified.  Sharing  between  MetSat  and  MSS  in  the  band  1  675-  1  690  MHz  is  feasible  only  if  appropriate
 separation  distances  are  maintained.
 Sharing  between  MetSat  and  MSS  may  not  be  feasible  in  those  countries  where  a  large  number  of  MetSat  stations  are  deployed.  Recommendation  ITU-  R  SA.  1158-  2  indicates  that  additional  studies  are
 required  in  order  to  determine  the  criteria  for  coordination  between  MSS  and  the  MetSat  service  for  GVAR/  S-  VISSR  stations  operated  in  the  band  1  683-  1  690  MHz  in  Regions  2  and  3.
 Other  spectrum  identified  in  Resolution  213  included  1  690-  1  710  MHz.  However,  the  ITU-  R  has  concluded  that  co-  channel  sharing  between  MSS  and  MetAids  is  not  feasible  and  that  co-  frequency
 sharing  between  MetAids  and  MetSat  services  is  not  feasible.  Therefore,  the  World  Meteorological  Organization  (WMO)  has  identified  future  spectrum  requirements  for  MetAids  operations  as  limited  to
 the  1  675-  1  683  MHz  portion  of  the  1  675-  1  700  MHz  band,  but  some  administrations  will  continue  to  require  spectrum  in  the  range  1  683-  1  690  MHz  for  MetAids  operations.  Resolution  227  noted  that,
 due  to  incompatibility  between  MSS  and  MetSats/  MetAids,  no  further  study  is  required  on  sharing  in  the  1  675-  1  683  MHz  and  the  1  690-  1  710  MHz  bands.
 The  existing  Region  2  allocation  includes  the  provision  that  MSS  operation  should  not  constrain  current  and  future  development  of  the  MetSat  service,  as  specified  in  No.  5.377.  No  MSS  services
 have  been  implemented  under  the  Region  2  allocation  in  this  band.
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 20
 Proposal:
 USA/  /1  MOD
 1  675-  1  710  MHz
 Allocation  to  services
 Region  1  Region  2  Region  3
 1  675-  1  690
 METEOROLOGICAL  AIDS
 FIXED
 METEOROLOGICAL-  SATELLITE  (space-  to-  Earth)
 MOBILE  except  aeronautical  mobile
 1  675-  1  690
 METEOROLOGICAL  AIDS
 FIXED
 METEOROLOGICAL-  SATELLITE  (space-  to-  Earth)
 MOBILE  except  aeronautical  mobile
 MOBILE-  SATELLITE  (Earth-  to-  space)
 1  675-  1  690
 METEOROLOGICAL  AIDS
 FIXED
 METEOROLOGICAL-  SATELLITE  (space-  to-  Earth)
 MOBILE  except  aeronautical  mobile
 5.341  5.341  5.377  5.341
 1  690-  1  700
 METEOROLOGICAL  AIDS
 METEOROLOGICAL-  SATELLITE  (space-  to-  Earth)
 Fixed
 Mobile  except  aeronautical  mobile
 1  690-  1  700
 METEOROLOGICAL  AIDS
 METEOROLOGICAL-  SATELLITE  (space-  to-  Earth)
 MOBILE-  SATELLITE  (Earth-  to-  space)
 1  690-  1  700
 METEOROLOGICAL  AIDS
 METEOROLOGICAL-  SATELLITE  (space-  to-  Earth)
 5.289  5.341  5.382  5.289  5.341  5.377  5.381  5.289  5.341  5.381
 1  700-  1  710
 FIXED
 METEOROLOGICAL-SATELLITE  (space-  to-  Earth)
 MOBILE  except  aeronautical  mobile
 1  700-  1  710
 FIXED
 METEOROLOGICAL-  SATELLITE  (space-  to-  Earth)
 MOBILE  except  aeronautical  mobile
 MOBILE-  SATELLITE  (Earth-  to-  space)
 1  700-  1  710
 FIXED
 METEOROLOGICAL-  SATELLITE  (space-  to-  Earth)
 MOBILE  except  aeronautical  mobile
 5.289  5.341  5.289  5.341  5.377  5.289  5.341  5.384
 Reasons:  There  are  no  MSS  systems  operating  in  this  band,  and  none  are  currently  planned,  due  to  the  incompatibility  of  MSS  and  the  Metaids  and  MetSat  services.
 USA/  /2
 SUP
 5.377
 Reasons:  Consequential  to  the  deletion  of  the  allocation  for  MSS.
 -FCC-
20