1991-027A
The highlight of STS-37 was deployment of the Compton Gamma Ray Observatory.
EVA-1 was a contigency EVA to release the GRO high gain antenna. EVA-2 was the planned EVA, the EVA Flight Development Experiment to test out CETA, the MFR, and CLIP. The EVA began at 1443. The hatch was closed at 2041, and the airlock was repressurized at 2054. Total depress time was 10h23m; official time was 9h17m (=3:30+5:47)
The DTO OMS burn on Apr 9 demonstrated the use of star trackers in rendezvous maneuvers, and other rendezvous procedures.
| STS-37 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1991 Mar 8 | Tow to VAB | ||
| 1991 Mar 15 | Rollout | LC39B | |
| 1991 Apr 5 | 1422:45 | Launch from LC39B | |
| 1424:50 | SRB sep 47.7 km | -6256 x 63? | |
| 1431:18 | MECO | 59 x 437 x 28.5 | |
| 1431:36 | ET sep | 89.68 71 x 445 x 28.5 (OMS dV) | |
| 1504:28 | OMS-2 (3:55) 112 m/s | ||
| 1508:23 | OMS-2 CO | ||
| 1530? | 93.63 446 x 458 x 28.5 | ||
| 1950 | RMS checkout | ||
| 1991 Apr 6 | 1225 | Cabin depress to 10.3 psi | |
| 1991 Apr 7 | 93.63 445 x 458 x 28.5 | ||
| 1100 | Go for grapple | ||
| 1105? | RMS grapple GRO | ||
| 1114 | confirmation of grapple | ||
| 1157? | GRO unberth | ||
| 1206 | RMS raising GRO out of bay | ||
| 1222 | RMS/GRO in release position | ||
| 1249 | Right solar array deploy complete | ||
| 1322 | Solar arrays deploy complete | ||
| 1403 | Command to deploy HGA | ||
| 1409 | HGA failed to deploy | ||
| 1557 | Go for EVA preparation | ||
| 1822 | Begin airlock depress | ||
| 1827 | 5 psi leak check | ||
| 1831 | Resume depress | ||
| 1839? | at vacuum | ||
| 1839 | EVA-1 (04:38) depress | ||
| 1842 | Hatch open | ||
| 1845 | Egress | ||
| 1855 | Apt frees boom | ||
| 1920 | Completing EVA work reconfiguring GRO | ||
| 1940? | EFDE get-aheads | ||
| 1950? | PDAP 1 from airlock | ||
| 2000 | PDAP 1 active on CETA outrigger handrail | ||
| 2003 | EVA Translation experiment (ETE) | ||
| 2010 | Evaluate ETE outrigger handrail | ||
| 2025? | Ross working at CLIP, with PDAP | ||
| 2110? | Ross on CLIP holding Apt, mass handling test | ||
| 2120 | Connect ETE rope tether across PLB, translation tests | ||
| 2125 | Rope from CLIP to CETA | ||
| 2140 | Complete rope tether work | ||
| 2150 | PLB cleanup | ||
| 2200? | Back to airlock | ||
| 2236:47 | GRO deployed | ||
| 2236:48 | RCS sep | ||
| 2244 | Go to repress airlock | ||
| 2247 | RCS sep | ||
| 2300 | Hatch closed and locked | ||
| 2302 | EVA-1 repress airlock (transcript) | ||
| 2304 | RCS sep | ||
| 2317 | EVA-1 repress (docs) | ||
| 1991 Apr 8 | 0012 | 93.66 445 x 461 x 28.5 | |
| 1259 | Depressurizing airlock? | ||
| 1417? | Prep for egress? | ||
| 1442 | Started depress | ||
| 1443 | EVA-2 EFDE | ||
| 1444 | Leak check | ||
| 1447 | Resuming depress | ||
| 1455 | At vac? | ||
| 1456? | EVA-2 depress? | ||
| 1456? | Hatch open | ||
| 1458 | Egress | ||
| 1512 | PDAP on CETA | ||
| 1520 | On the CETA cart | ||
| 1534 | Deploying CETA track | ||
| 1542 | CETA track fully deplpyed | ||
| 1545 | Manual cart tests | ||
| 1624 | Working with manual cart | ||
| 1630 | Mech cart tests | ||
| 1649 | Evaluating mechanical cart | ||
| 1706 | Stow mech cart | ||
| 1720 | Begin electrical cart | ||
| 1734 | Stow elec cart? | ||
| 1740? | Working on tether shuttle | ||
| 1740 | PDAP 2 turned off | ||
| 1759 | PDAP 2 in airlock | ||
| 1810 | Completed tether shuttle work | ||
| 1820 | Stow track | ||
| 1830 | ETE RMS tests | ||
| 1850 | Testing RMS/MFR/Ross | ||
| 1920 | EVA stiffness test, with RMS and CLIP | ||
| 2000 | Stow MFR | ||
| 2015 | End work with CLIP | ||
| 2016 | MFR stowed, RMS off? | ||
| 2025 | Tool stowage | ||
| 2040? | Ingress | ||
| 2041 | Hatch closed | ||
| 2044 | Burn | ||
| 2054 | Repress (06:11) | 93.61 442 x 459 x 28.5 | |
| 1991 Apr 9 | 1303 | 93.61 443 x 458 x 28.5 | |
| 1519:13 | OMS-3 (10s) | ||
| 1545 | RV/stationkeep 15 km from GRO | ||
| 1736 | RCS burn | ||
| 1910 | Sep burn | ||
| 1927 | 93.66 445 x 461 x 28.5 | ||
| 1991 Apr 10 | 1100 | PLBD closed | |
| 1400 | Landing waveoff | ||
| 1417 | Open PLBD | ||
| 1991 Apr 11 | 0200 | 93.67 445 x 462 x 28.5 | |
| 1110? | PLBD closed | ||
| 1245:50 | OMS deorbit 3:41 134m/s | 88.98 -13 x 461 x 28.5 | |
| 1324:23 | Entry interface | ||
| 1355:29 | Landed RW33 EAFB | ||
| 1355:35 | NGTD | ||
| 1356:25 | Wheels stop | ||
| 1991 Apr 16 | 1045 | SCA takeoff | EAFB |
| 1540 | SCA landing | Kelly AFB TX | |
| 1815 | SCA takeoff | ||
| 2030 | SCA landing | Columbus AFB MS | |
| 1991 Apr 17 | 1415 | SCA takeoff | |
| 1850 | SCA landing | MacDill AFB, FL | |
| 1991 Apr 18 | 1135 | SCA takeoff | |
| 1210 | SCA landing | KSC SLF | |
| 1425 | Tow to OPF | OPF/2 | |
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