USREDCOM  PAMPHLET  525-7 
TAC  PAMPHLET  100-13 
TRADOC  PAMPHLET  525-40 
USLANTCOM  PUB  621-1 
USCENTCOM  PAMPHLET  525-1 
SYSTEM  MANUAL  FOR  EMPLOYING  TRI-TAC 
EQUIPMENT  IN  JOINT  COMMUNICATIONS  SYSTEMS 
3rd  EDITION 
1  JUNE  1986 
VOLUME  I 
JOINT  COMMUNICATIONS  SYSTEMS  ARCHITECTURE 
AND  MANAGEMENT  PROCEDURES 
Supersession:  Volume  I  is  the  first  in  a  series  of  six  volumes  of 
the  3rd  Edition.  This  new  Volume  I  supersedes  Volume  I  of  the  2nd 
Edition.
USREDCOM  PAMPHLET  525-7 
TAC  PAMPHLET  100-13 
TOADOC  PAMPHLET  525-40 
USLAKTCOM  PUB  621-1 
USCENTCOM  PAMPHLET  525-1 
3-5.2.  UHF  Satellite  Planning  Factors.  Special  purpose  point- 
to-point  circuits  ire   provided  to  the  joint  tactical  user  over 
existing  UHF  satellite  facilities.  These  include  both  the  AFSATCOM 
network  and  the  FLTSATCOM  network.  However,  it  should  be  noted  that 
normal  access  for  joint  exercises  contingencies  is   through  the 
AFSATCOM  wideband  channels  supported  by  UHF  transponders .  These 
transponders  are  located  on  th&  ?LTSATC0M  satellites,  tkt%\liz%  U*ta 
Systems  (SDS)  satellites,  and  Lincoln  Experimental  Satellites  8  and 
9  (LES  8  and  9).  Since  these  satellites  are  also  shared  by  many 
users,  a  control  mechanism  has  bean  established  for  accessing  and 
using  these  facilities.  Procedures  to  be  followed  for  gaining 
access  to  these  networks  are  outlined  in  a  document  entitled: 
"AFSATCOM  Communications  Control  and  Operational  Concepts  (C),"  • 
(Reference  A-13).  Communications  channels  supported  by  these  links 
to  either  AUT0V0N,  AUTQDIN,  or  AUTOSEVOCOM  facilities  can  be 
extended  at  selected  UHF  terminal  locations  as  discussed  in 
Reference  A-13.  Factors  that  must  be  considered  by  the  joint 
planner  are  discussed  below. 
3-5.2.1.  UHF  Satellite  Access  Request.  Figure  3-2  depicts  the 
message  format  used  to  request  access  to  the  UHF  satellite  network. 
Primary  Control  Centers  (PCCs)  for  this  network  are  listed  in  Table 
3-1.  Unless  otherwise  directed,  users  west  of  the  Mississippi  River 
should  send  request  messages  to  33  ISG  MARCH  AFB  CA//DODB/,  and 
users  east  of  the  Mississippi  should  send  requests  to  DET  2  2045CG 
BRANDYWINE  MD//D0ND//.  Information  copies  should  be  sent  to  SISD 
OFFUTT  AFB  NE//YK0/YK0P//.  Characteristics  of  the  AN/WSC-3  used  as 
a  UHF  ground  terminal  in  this  net  are  discussed  in  Volume  IV, 
Chapter  17.  System  performance  factors  that  oust  be  considered  are 
discussed  below. 
3-5.2.2.  UHF  Satellite  System  Performance  Parameters.  The 
AN/MSC-71  UHF  satellite  terminals  are  upgraded  terminals  that  will 
allow  operation  in  either  the  narrowband  (5  kHz)  or  wideband  (25 
kHz)  channels.  The  AN/URC-101  UHF  terminal  operates  in  the  25  kHz 
mode  and  is  compatible  with  the  AN/MSC-71  (or  AN/WSC-3)  in  the 
wideband  mode  of  operation.  Details  which  must  be  considered  in  UHF 
satellite  system  engineering  are  discussed  in  Volume  IV,  Chapter  16. 
3-13
USREDCOM  PAMPHLET  525-7 
TAC  PAMPHLET  100-13 
TRADOC  PAMPHLET  525-40 
USLANTCOM  PUB  621-1 
USCENTCOM  PAMPHLET  525-1 
Table  3-1.   Primary  Control  Center  (PCC)  Satellite  Assignment 
Present 
Satellite 
100*  Vest 
23'  West 
172"  East 
72*  East 
LES  8/9 
SDS 
PCC 
March  AFB 
Brandywine 
March  AFB 
Mildenhall 
Brandywine 
Offutt  AT* 
Alt  PCC 
Brandywine 
Offutt  AFB 
Eielson  AFB 
Navy 
MIT  Lincoln  Labs 
Brandywi&t 
Final  (Post  CY  84) 
Satellite 
100*  West 
23*  West 
172'  East 
72'  East 
5DS 
PCC 
Brandywine 
Mildenhall 
March  AFB 
Kadena  AFB 
Brandywifie 
Alt  PCC 
March  AFB 
Brandywine 
Kadena  AFB 
Mildenhall 
Offutt  AFB 
3-16