1981-034A
OV-102 was launched on mission STS-1 at 1200:04 UT on 1981 Apr 12 from pad 39A at Kennedy Space Center. The SRBs separated at 1202:15, and by 1202:44 the Shuttle stack was at 72 km altitude. By 1206:00 the Shuttle was at 141 km and began to dive back toward Earth, picking up speed. The SSMEs throttled back at 1207:34 as the altitude dropped to 124 km. At 1208:38 came MECO (Main Engine Cutoff), with Columbia now in orbit, with international designation 1981-34A. The initial orbit was only 24 x 140 km x 40 deg. The External Tank separated at 1208:56 and at 1209:11 the RCS jets were fired to clear Columbia from its path. The crucial OMS engines were fired for the first time at 1210:38 for the 86s long OMS 1 burn, shutdown of which at 1212:08 left Columbia in a 105.6 x 244.6 km x 40.3 deg orbit. The Auxiliary Power Units were shut down and the ET umbilical doors were closed. At 1244:06 the 75s long OMS 2 burn circularized the orbit. At 1331 the process of opening the payload bay doors began; this was completed at 1352. The radiators inside the doors were deployed at 1420 UT.
On orbit tests now began, with a single left hand engine OMS burn, the 30s OMS 3, at 1820:49 raising the orbit to 244 x 273 km, and a right hand engine 33s OMS 4 burn at 1905:35 putting it in a 266 x 272 km orbit. Three test burns of the RCS were made, the third at 1213 on Apr 13. The payload bay doors were successfully closed at 1448 on Apr 13, and opened again at 1647. This was followed by further RCS tests. At 1430 on Apr 14, the doors were once again closed and latched, and at 1721 the OMS engines began the 155s deorbit burn, from a final orbit of 259 x 271 km. Entry interface at 120 km altitude came at 1750 UT on Apr 14. Reentry mass was 89930 kg. Reentry and hypersonic winged flight was flawless with main gear touchdown on runway 23 at Edwards AFB at 1820:51. The nose gear touched down at 1821:11 and Columbia rolled out to a triumphant wheels stop at 1821:57.
| STS-1 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1980 Nov 24 | STS-1 rollover to VAB/3 | ||
| 1980 Dec 22 | ET mate | ||
| 1980 Dec 29 | 1300 | Rollout | LC39A |
| 1981 Feb 20 | 1345 | FRF | LC39A |
| 1981 Apr 12 | 1200:04 | Launch | LC39A |
| 1202:15 | SRB sep | -6280 x 83 x 40 | |
| 1208:38 | MECO | ||
| 1208:56 | ET sep | 24 x 148 x 40.4 (MOR) | |
| 86.30 31 x 149 x 40.4 (dV) | |||
| 1210:38 | OMS 1 86s 50.1m/s | 105 x 241 x 40.4 (MOR) | |
| 87.97 109 x 238 x 40.4 (dV) | |||
| 1221 | ET apogee | ||
| 1244:06 | OMS 2 75s 41.7m/s | ||
| 1244:44 | ET at 91.4 km | ||
| 1247 | ET breakup | ||
| ET impact at 88.20E 28.40S | |||
| 1331 | PLBD open | 89.39 238 x 250 x 40.35 | |
| 1621 | 89.35 238 x 246 x 40.35 | ||
| 1820:49 | OMS 3 (LH, 30s) 7.8m/s | 244 x 273 | |
| 1905:35 | OMS 4 (RH 33s) 9.0m/s | 89.92 267 x 273 x 40.3 | |
| 1981 Apr 13 | 0418 | 89.89 266 x 271 x 40.3 | |
| 1213 | RCS | ||
| 1448 | PLBD closed | ||
| 1647 | PLBD open | 89.88 265 x 271 x 40.3 | |
| 1981 Apr 14 | 1430 | PLBD closed | 89.83 260 x 272 x 40.3 |
| 1721:34 | OMS DO (155s) 90.7m/s | ||
| 1724:09 | OMS DO CO | ||
| 7 x 273 x 44.2 (CR-3561) | |||
| 4 x 276 x 40.3 (MOR) | |||
| 1750 | Entry | ||
| 1820:51 | Landing | RW23 EAFB | |
| 1821:11 | NGTD | ||
| 1821:57 | Wheels stop | ||
| 1981 Apr 27 | 1716 | SCA ferry | EAFB to Tinker AFB, OK |
| 1981 Apr 28 | 1159 | SCA ferry | Tinker to KSC SLF |
| 1500 | SCA arr KSC | ||
| 1981 Apr 29 | 1535 | OPF/1 | |
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