1985-109A
The second flight of Atlantis was one of the most ambitious of the 1985 missions. Three PAM-D satellite deployments were followed by a pair of spacewalks to study on-orbit assembly. A single GAS can carried experiments by Canadian high school students. The Continuous Flow Electrophoresis System and a 3M experiment for Diffuse Mixing in Organic Solids (DMOS) flew on the middeck.
After launch on 1985 Nov 27, the Mexican Morelos communications satellite was deployed only 5 hours after payload bay door opening. Morelos was a standard American-built Hughes HS-376 model spinning comsat, but because of its presence the Mexican government had been invited to send along a payload specialist, Dr. Rodolfo Neri Vela. Dr. Neri carried out a series of mid-deck experiments under the MPSE (Morelos Payload Specialist Experiments) program, mostly life sciences related.
The following day, the Aussat satellite and the Satcom K-2 satellite were deployed.
Nov 29 saw the first spacewalk of the mission. Sherwood `Woody' Spring and Jerry Ross entered the payload bay and practiced assembling and disassembling two large structures mounted on a payload bay MPESS carried. ACCESS consisted of a truss structure made of many small components, while the rival EASE was a tetrahedron consisting of a few large tubes joined by special nodes. During the EVA, Spring carried out a small device called OET from the airlock, and jettisoned it into space by hand. The OET (OEX Target, Orbiter Experiments Target) was a radar target to allow Atlantis to perform rendezvous experiments.
After a day of rest, Spring and Ross returned to the bay for EVA-2. This EVA continued the work of the first, with the EASE and ACCESS structures being reassembled and disassembled.
Atlantis returned to Earth on Dec 3, landing at Edwards AFB.
| STS 61-B | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1985 Nov 8 | Tow to VAB | VAB/3 | |
| 1985 Nov 8 | ET mate | ||
| 1985 Nov 12 | Rollout | LC39A | |
| 1985 Nov 27 | 0029:00 | Launch from LC39A | |
| 0031:03 | SRB sep at 44.7 km | ||
| 0037:31 | MECO at 109.9 km | 88.63 63 x 350 x 28.5 | |
| 0037:49 | ET sep at 112.1 km | 88.72 69 x 353 x 28.5 | |
| 0109:24 | OMS-2 (3:00) 85m/s | ||
| 0112:25 | OMS-2 CO | 91.66 353 x 359 x 28.5 | |
| 0202 | PLBD open | ||
| 0746:50 | Morelos deploy | ||
| 0802 | OMS-3 (RH 13s) 3m/s | 91.78 356 x 366 x 28.5 | |
| 1985 Nov 28 | 0120:33 | Aussat deploy | |
| 0135 | OMS-4 (RH 13s) 3m/s | 91.90 364 x 370 x 28.5 | |
| 2157:31 | Satcom deploy | ||
| 2213? | OMS-5 (LH 16s) 4m/s | 92.04 368 x 381 x 28.5 | |
| 1985 Nov 29 | |||
| 2143 | EVA-1 depress? | ||
| 1985 Nov 29 | 2145 | EVA-1 (05:32) | |
| 2147 | Hatch open | ||
| Spring, Ross egress | |||
| 2200? | Begin ACCESS experiment | ||
| 2245? | ACCESS assembled bays 1-10 | ||
| Disassemble ACCESS | |||
| 2311 | Stow ACCESS | ||
| 2316 | at PSA | ||
| 1985 Nov 29 | 2330? | EASE experiment | |
| Assemble/disassemble 6 times | |||
| 2335? | Cycle 1 | ||
| 2350? | Cycle 2 | ||
| 1985 Nov 30 | 0010? | Cycle 3 | |
| 0030? | Cycle 4 | ||
| 0050? | Cycle 5 | ||
| 0115? | Cycle 6 | ||
| 0130? | Cycle 7 | ||
| 0155? | Cycle 8 | ||
| 0215? | Stow EASE | ||
| 0224 | In airlock | ||
| 0225 | Obtain AAPS target (OET) | ||
| 1985 Nov 30 | 0230 | OET deployed by Spring | 92.06 368 x 382 x 28.5 |
| 0240 | Moving RMS for OEX deploy obs | ||
| 0255 | Target stable | ||
| 0310 | Ingress procedures | ||
| 0317 | End EVA-1 | ||
| 0323 | Repress | ||
| 0816? | Stationkeep with OET (DAP test) at 10m | ||
| 1130 | End OET test | 92.08 368 x 383 x 28.5 | |
| 1985 Dec 1 | 0140? | OMS-6 (RH 49s) 15m/s | 91.60 322 x 383 x 28.5 |
| 2022 | Depress? | ||
| 2023 | Hatch open? | ||
| 1985 Dec 1 | 2030 | EVA-2 (06:38) | |
| 2030? | Spring, Ross egress | ||
| 2037 | Working with MFR | ||
| 2050? | MFR grapple | ||
| 2100? | ACCESS configured, built 1-9 | ||
| 2129? | Getting in MFR | ||
| 2130? | EV-1 in MFR, built bay 10 | ||
| 2230? | EV-1 manipulate ACCESS from MFR | ||
| 2240? | EV-1 off MFR | ||
| 2245? | EV-2 on MFR | ||
| 2250? | Disassemble bay 10 | ||
| Task work on bay 8 | |||
| 2330? | Rebuild bay 10 | ||
| 2340? | EV-2 on MFR manipulate ACCESS | ||
| 2350? | Disassemble ACCESS | ||
| 1985 Dec 2 | 0000? | EV-2 off MFR | |
| 0010? | Stow ACCESS, unstow EASE | ||
| 0015? | EV2 on MFR | ||
| 0030? | Work with heat pipe assembly | ||
| 0045? | Build EASE | ||
| 0100? | EV2 manipulate EASE | ||
| 0110? | EV2 off MFR, EV1 on | ||
| 0115? | EV1 manipulate EASE | ||
| 0145? | EV1 in MFR disassemble EASE | ||
| 0155? | EV1 build heat pipe | ||
| 0215? | EV1 egress MFR | ||
| 0225? | Stow EASE | ||
| 0230? | Stow MFR | ||
| 0230 | Cleanup | ||
| 332 x 382 x 28.5 | |||
| 0256? | Ingress | ||
| 0258 | HC | ||
| 1985 Dec 2 | 0308 | End EVA-2 | |
1985 Dec 3 | 1716 | PLBD close | 91.62 322 x 384 x 28.5 |
| 1985 Dec 3 | 2026:45 | OMS DO (169s) 96 m/s | |
| 2029:34 | OMS DO CO | ||
| 2103:17 | Entry | ||
| 2133:49 | Landed at RW22 EAFB | ||
| 2134:00 | NGTD | ||
| 2135:07 | Wheels stop | ||
| 1985 Dec 7 | 1430 | SCA takeoff | EAFB |
| 1750 | SCA landing | Kelly AFB TX | |
| 1932 | SCA takeoff | ||
| 2215 | SCA landing | KSC SLF | |
| 1985 Dec 8 | 0330 | Tow to OPF | |
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