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[[right margin]]BILL GREYER
JACK JURACO[[/right margin]]
15 DEC   PALAPA BRIEFING (HUGHES, PERUMTEC, at JSC)
2 PALAPA A's in orbit now (launched in 1976, 77)-used
for TV, data, telephone for IND. & ASEAN members
PALAPA B's req'd to replace A's (7yr lifetime)
•#2 on STS-11
•more coverage of IND, Thailand, Malaysia [centered at 108°E]
•C-band/8-year lifetime
•twice as many comm channels
S/C Events: nutation Cntl req'd [[left bracket over follwing 2 lines]]
DPY + 2 min - OMNI deploy (cmd, data, acq.)
DPY +45 min - PKM[[/left bracket]]
Stable - No nutation cntl req'd [[left bracket over follwing 3 lines]]
PKM + 2 min - S/C separates from PAM 
(reorient S/C for AKM)
PKM + ~40 hrs - AKM (usually 4th apogee)[[/left bracket]]
Post-AKM: Extend solar panel
deploy comm antenna
despin comm shelf
INTELSAT network & Djakarta station used for acq. & cntl-
Djakarta is prime after AKM
[[2 Columned Table]]
| Spinning Structure: | Despun:|
| RCS SYS | COMM equipment |
| Nutation CNTL | Antenna + Feeds|
| Electronics | --- |
Inhibits:
[[4 Columned Table]]
| to AKM- | S&A | to RCS: | LVLV |
| --- | AKM ENA | --- | INH SW |
| --- | INH SW | --- | fire cmd (require 2 failures) |
| --- | transistor (unmonitored) | --- | ---|