Mission 15
STS-20/51-C
1985-010A
Crew: 5 CDR - Thomas K. Mattingly
Plt - Loren J. Shriver (EV 2)
MS 1 - Ellison S. Onizuka
MS 2 - James F. Buchli (EV 1)
PS 1 - Gary E. Payton
Launch 24 January 1985 @ 1450:00 EST
Orbital incl: 28.49
Max alt: 342.8 km.
Orbits: 48
Dur: 3:01:33:23
Landing: 24 January 1985 @ 1623:23 EST
Launch Info: Orbiter - Discovery 103-3 Pad 39A KSC (MLP-1) - Liftoff delayed 39
minutes from original time - 1411 EST, due to right hand elevon instrumentation failure.
First launch attempt - 23 January, scrubbed due to cold weather (prior to propellant
loading). Landing at KSC.SLF runway 15 (4th KSC landing). DOD announced 51-C
was brought home one day early due to approaching weather at KSC.

MISSION PARTICULARS
Launch Window: DOD announced period 1:15 to 4:15 pm EST
TAL Sites: Dakar, Senegal
AOA site: KSC/SLF
Primary landing site: KSC/SLF
Landing Speed: 185 knots (212 mph)
Landing rollout: 7,352' from main gear touchdown
Vehicle weight @ liftoff: N/A
Orbiter weight @ liftoff: N/A
Orbiter weight @ landing: N/A
PAYLOADS
Cargo mass approx.: N/A
Special mission kits: RMS-301, EMU's 1055 & 1056, GAlley, teleprinter
PRIMARY PAYLOADS
DOD 85-1 Magnum (Aquacade?) - 1985-010B/USA-8 Signals Intelligence Satellite/IUS. Mass - 5,985 lbs on an IUS cradle. (Reportedly deployed at 7 am on 25 January (FD-2))
SECONDARY PAYLOADS
Mid-deck (unclassified) 1) ARC (Aggregation of Red Cells), 2) SFMD (Storable Fluid Management Demonstration) - occupied 4 mid-deck lockers, 3) CLOUDS-1A QRSP Q010 (see STS-12/41-D), OCEANS (STP QRSP Q004 visual observations). New via FOIA - VISION, AFT, RME, IOCM & OASIS
SHUTTLE STACK COMPONENTS
SSME's: 2109 (1) - 5th use, 2018 (2) - 4th use, 2012 (3) - 7th use. At liftoff 100% to 104% after throttle-up
OMS Pods/Engines: LP-03/107 - 4th use, RP-03/108 - 3rd use
ET: ET-14 (LWT-07)
SRB's: SRM-15/BI-015 - Booster set successfully recovered, last use of smaller parachutes
SHUTTLE STACK COMPONENTS
Left - 15A Right - 15B
New 026 Fwd 027 New
5-B 082 Cyl 083 Q-4
5-B 085 Cyl 086 5-B
New L77 Cyl L28 Q-4
New L78 Cyl L05 6-A
New L75 Cyl L26 Q-4
New L76 Cyl L27 Q-4
Q-4 L06 Att L15 New
New L25 Stf L02 6-A
6-A L01 Stf L07 7-A
New 026 Aft 027 New
First DOD Mission.
MISSION MILESTONES:
9 November 1983 ET-14 arrives on dock KSC
30 October 1984 ET/SRB mate
16 November 1984 OV-103 arrives at OPF-2 following KSC landing of Mission 14/51-A
21 December 1984 OV-103 rollover to VAB High Bay 1 for mating with stack same day
5 January 1985 Stack rollout to Pad 39A
7 January 1985 TCDT dress rehearsal conducted with crew aboard orbiter
20 January 1985 Astronaut arrival KSC
21 January 1985 "Call to stations" 43 hr. countdown started at 4 am EST
24 January 1985 Launch
27 January 1985 Landing at SLF/KSC and delivered to OPF same day
pre-shuttle missions. shuttle era missions.
Table of Contents Shuttle Missions Main