1984-108A
After the 41-C mission, NASA started to prepare Challenger for mission 41-H, but that mission was cancelled shortly afterwards. OV-099's next assignment was 41-G. The STS 41-G mission was devoted to science and earth observation. It was launched on 1984 Oct 5, and its crew was the first to include two women, and a Canadian payload specialist.
ERBS deploy was originally scheduled for orbit 6, and was delayed to orbit 9 after thermal problems with its antenna. After ERBS deploy, the orbit was lowered with 4 burns. Operations with the OAST-3 and LFC payloads were carried out. The crew had problems stowing the SIR-B antenna for the OMS-3 burn, which was delayed until a nudge from the RMS fixed the problem.
The ORS carried 85 kg of hydrazine. The first of 6 ORS hydrazine transfers was carried out on Oct 6. An IMAX camera was also carried. The EVA began at 1542. Sullivan and Leestma entered the payload bay and carried out tests with the ORS refuelling experiment. A ball valve mod kit was installed on the ORS and after the EVA was confirmed to be working. The astronauts practiced stowing the Ku-band antenna manually.
| STS 41-G mission events | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1984 Sep 8 | VAB/1 | ||
| 1984 Sep 13 | LC39A | ||
| 1984 Oct 5 | 1103:00 | Launch | LC39A |
| 1105:04 | SRB sep at 48.0 km | ||
| 1111:50 | MECO at 113.7 km | ||
| 1112:08 | ET sep, 115.5 km | ||
| 86.65 41 x 174 x 57.0 (dV) | |||
| 86.65 30 x 186 x 57.0 (dv) | |||
| 1113:50 | OMS 1 (2:11) 68.5m/s | 99 x 353 km | |
| 1116:04 | OMS 1 CO | 88.97 96 x 350 x 57.0 (dV) | |
| 1134? | ET apogee 174 km | ||
| 1149:30 | OMS 2 (2:23) 75.3m/s | ||
| 1151:54 | OMS 2 CO | ||
| 1204 | ET breakup 57.1S 150.0E | ||
| 1221 | PLBD open | 91.59 346 x 358 x 57.0 | |
| 1430 | RMS checkout | ||
| 1453 | Go for grapple | ||
| 1505? | RMS grapple ERBE | ||
| 1830? | RMS unberth ERBE | ||
| Deployment delay by 2 revs | |||
| 1908 | ERBS array deploy | ||
| 2125 | SIR-B antenna deploy | ||
| 2218:22 | RMS deploy ERBE | ||
| 1984 Oct 6 | 1426 | 91.59 345 x 359 x 57.0 | |
| 1606 | SIR-B stow | ||
| 1807 | Ride uses RMS to tap SIR-B antenna closed | ||
| 1825 | RMS tap, latch engaged | ||
| 1912 | OMS 3 (51s), 27.6m/s lower orbit | ||
| 1953 | OMS 4 (51s) 28.0m/s | ||
| 1984 Oct 7 | 0829 | 89.63 250 x 262 x 57.0 | |
| 1122 | OMS 5 (19s) 10.7m/s | ||
| 1208 | OMS 6 (16s) 8.8m/s | ||
| 1345 | SIR-B deploy | ||
| 1412 | 88.96 216 x 230 x 57.0 | ||
| 1984 Oct 8 | 1238 | Trim burn | |
| 1811 | 88.98 217 x 230 x 57.0 | ||
| 1984 Oct 10 | 1242 | RCS trim | |
| 1440 | 88.92 216 x 225 x 57.0 | ||
| 1984 Oct 11 | 1359 | SIR-B stow | |
| 1530 | Leak check | ||
| 1538:09 | EVA-1 begin (Rockwell, STSMR) | ||
| 1542 | EVA-1 begin (egress) | ||
| 1545 | Sullivan egress | ||
| 1622 | Working on ORS lines | ||
| 1700 | Working on ORS | ||
| 1748 | Completion of ORS work | ||
| 1800 | Ku antenna stowed | ||
| Antenna repair | |||
| 1820 | Redeploy antenna | ||
| 1854 | At airlock hatch | ||
| 1905:00 | EVA-1 end (STSMR) back on SCU in AL | ||
| 1911 | EVA-1 end | ||
| 1833? | SIR-B open | ||
| 1984 Oct 12 | 0833 | 88.92 215 x 226 x 57.0 | |
| 1984 Oct 13 | 1219 | PLBD close | 88.90 213 x 226 x 57.0 |
| 1530:00 | OMS DO (142s) 82.1m/s | ||
| 1532:22 | OMS DO CO | ||
| 1555:04 | Entry | ||
| 1626:33 | Landed | RW33 KSC | |
| 1626:47 | NGTD | ||
| 1627:32 | Wheels stop | ||
| 1950? | OPF | ||
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