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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) | --- | ---|