1975-072A
The COS-B (Celestial Observation Satellite B) gamma ray astronomy satellite was the first orbital payload launched under the auspices of ESA. Built by MBB, Aerospatiale and the CESAR consortium, the 3-axis stablized satellite was 1.40m in diameter and 1.21m high with 0.5m rod antennae giving an overall length of 1.7m. Control was from ESOC via Redu and Fairbanks. COS B was the first satellite to successfully survey the gamma ray sky, producing the 2CG catalog of gamma ray sources.
| COS B | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1975 Aug 9 | 0148:00 | Launch by Delta 2913 | V |
| T+0:38 SRM 1-6 out | |||
| T+0:39s SRM 7-9 burn | |||
| T+1:17 SRM 7-9 out | |||
| 0149 | T+1:27 SRM 1-9 sep | ||
| 0151 | T+3:48 MECO | ||
| 0151 | T+3:54 VECO | ||
| 0152 | T+3:56 Thor sep | ||
| 0152 | T+4:01 St 2 burn 290s | ||
| 0152 | T+4:31 Fairing sep | ||
| 0157 | T+8:51 SECO-1 224 km | 172 x 444 x 89 | |
| 0237 | T+49:22 SES-2 11s | ||
| 0237 | T+49:33 SECO-2 | 334 x 4740 x 89 | |
| 0238 | T+50:29 Delta sep | ||
| 0239 | T+51:12 Star 37 ignition | ||
| 0239 | T+51:56 St 3 burnout | ||
| 0241 | T+53:12 Star 37 sep | 347 x 99873 x 90.3 | |
| 0241 | Despin from 47 to 9 rpm | ||
| 1975 Aug 11 | 1100? | Experiment switchon begins | |
| 1976 Jan 1 | 2536 x 96895 x 92.0 | ||
| 1977 Jan 22 | 6198 x 93232 x 95.0 | ||
| 1978 May 15 | 9985 x 89409 x 96.5 | ||
| 1981 Mar | 13000 x 86000? x 97? | ||
| 1982 May 12 | end of ops | ||
| 1983 Mar? | 10000? x 89000? | ||
| 1984 Jan | 6000? x 93000? | ||
| 1985 Jan | 4000? x 95000? | ||
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