March 26, 2017

Timeline: Cygnus cargo ship’s trip from launch pad to space station

Based upon an on-time launch Thursday, this is the timeline for Cygnus from liftoff through capture by the space station’s robotic arm:

THURSDAY

EST...........HH...MM...SS...EVENT
05:55:45 PM...00...00...00...Launch
05:56:03 PM...00...00...18...Begain pitch and yaw maneuver
05:57:07 PM...00...01...22...Mach 1
05:57:19 PM...00...01...33...Max Q
06:00:00 PM...00...04...15...Booster engine cutoff
06:00:06 PM...00...04...21...Atlas separation
06:00:16 PM...00...04...31...Centaur main engine start
06:00:24 PM...00...04...39...Payload fairing jettison
06:14:01 PM...00...18...16...Centaur main engine cutoff
06:16:50 PM...00...21...05...Cygnus separation
06:37:45 PM...00...42...00...Verify commanding for solar array deploy
06:50:45 PM...00...55...00...Initiate solar array deploy
07:08:45 PM...01...13...00...Solar array deploy begins
07:25:45 PM...01...30...00 ..Solar array deploy complete
11:31:59 PM..................DV1 (775 s, 47.27 m/s)

FRIDAY

03:19:58 AM...DV2 (757 s, 46.89 m/s)
07:10:51 AM...DV3 (4 s, 0.26 m/s)
12:09:46 PM...PlaneManeuver (48 s, 3.02 m/s)
05:15:27 PM...DV5 (3 s, 0.2 m/s)
10:51:53 PM...DV6 (3 s, 0.2 m/s)

SATURDAY

12:17:48 PM...DV7 (3 s, 0.2 m/s)
09:07:09 PM...DV8 (3 s, 0.2 m/s)
12:44:56 AM...Go/No-Go for Joint Ops

SUNDAY

01:19:36 AM...Cygnus Transition to Relative Init (LVLH 0,0,0)
01:56:40 AM...Sunrise
02:15:56 AM...Joint Targeting Reference Point (JTRP) Arrival
02:19:56 AM...Go/No-Go 1 (ADV1 and ADV2)
02:31:56 AM...ADV1 Burn
02:54:07 AM...Sunset
03:05:56 AM...ADV2 Burn
03:09:56 AM...Range = 6km
03:25:00 AM...ISS Maneuver to Capture Attitude
03:29:20 AM...Sunrise
03:30:00 AM...ISS Maneuver to Capture Attitude Complete
03:34:56 AM...Go/No-Go 2 (ADV3 and ADV4)
03:49:56 AM...ADV3 (Approach Initiation) Burn
03:53:56 AM...Range = 1000m
04:03:56 AM...ADV4 Burn
04:13:56 AM...Range = 300m
04:20:56 AM...250m Hold Point Arrival
04:26:46 AM...Sunset
04:33:56 AM...Go/No-Go Depart 250m; Enter KOS
04:35:56 AM...250m Hold Point Departure
04:46:56 AM...Range = 100m
05:01:59 AM...Sunrise
05:02:59 AM...30m Hold Point Arrival
05:02:59 AM...Capture Attempt 1: Earliest GO for Capture (Sunrise + 1 min)
05:07:59 AM...Go/No-Go Depart 30m; Final Approach
05:12:59 AM...30m Hold Point Departure
05:16:59 AM...Capture Attempt 1: Earliest CP Arrival (Sunrise + 15 min)
05:21:59 AM...Capture Point Arrival
05:26:59 AM...Go/No-Go for Capture
05:27:00 AM...ISS Attitude Hold with Desats Inhibited

05:30:00 AM...Capture

05:36:00 AM...ISS USTO After Cygnus Capture
05:42:00 AM...ISS Maneuver to Berthed TEA
05:47:00 AM...ISS Maneuver to Berthed TEA Complete
05:49:24 AM...Capture Attempt 1: Latest GO for Capture (Sunset - 10 min)
05:59:24 AM...Sunset
06:29:39 AM...Capture Attempt 1: Latest CP Arrival (Sunrise - 5 min)
06:34:39 AM...Sunrise
06:35:39 AM...Capture Attempt 2: Earliest GO for Capture (Sunrise + 1 min)
06:49:39 AM...Capture Attempt 2: Earliest CP Arrival (Sunrise + 15 min)
07:22:03 AM...Capture Attempt 2: Latest GO for Capture (Sunset - 10 min)
07:32:03 AM...Sunset
08:02:19 AM...Capture Attempt 2: Latest CP Arrival (Sunrise - 5 min)

See earlier Cygnus OA-4 coverage.

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