1990-058A
IKI's Gamma (or Gamma 1) spacecraft was built around the Progress bus and built by NPO Energiya's ZEM factory. The satellite carried a spark chamber gamma ray telescope, but it reportedly failed and the only scientific results were from secondary X-ray telescopes. The satellite was placed in a 400 km orbit in Jul 1990 and deorbited in Feb 1992. The mission was a joint project between the USSR, Poland, and France.
| Gamma 1 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1990 Jul 11 | 1000:00 | Launch by Soyuz from Baikonur | |
| 1005 | Blok-I burn | ||
| 1009 | Blok-I sep | ||
| 0936 | 88.52 185 x 216 x 51.6 | ||
| 1912 | 90.59 182 x 423 x 51.6 | ||
| 1990 Jul 12 | 1648 | 92.04 321 x 428 x 51.6 | |
| 1990 Jul 13 | 1200 | 93.11 417 x 436 x 51.6 | |
| 1990 Jul 15 | 1648 | 93.07 415 x 433 x 51.62 | |
| 1990 Jul | Gamma 1 main telescope fails | ||
| 1990 Aug 8 | 93.00 411 x 430 x 51.6 | ||
| 1990 Sep 23 | 92.83 404 x 421 x 51.6 | ||
| 1990 Sep 24 | 92.99 420 x 421 x 51.6 | ||
| 1991 Mar 4 | 92.12 377 x 379 x 51.6 | ||
| 1991 Mar 7 | 92.98 420 x 420 x 51.6 | ||
| 1991 Oct 9 | 91.41 340 x 346 x 51.6 | ||
| 1991 Oct 15 | 92.27 385 x 386 x 51.6 | ||
| 1992 Jan 5 | 91.36 339 x 342 x 51.6 | ||
| 1992 Feb 20 | 89.79 261 x 267 x 51.6 | ||
| 1992 Feb 28 | |||
| 0830? | Possible deorbit | ||
| 0950? | Possible deorbit 60 m/s? | ||
| 1030? | Entry? over Pacific | ||
Payload:
- Gamma 1 telescope 50MeV-5GeV gamma rays spark chamber + SKAT coded mask
- Pulsar-X2 X-ray telescope (Spectre 2) (IKI/CESR-CNES/)
- Disk gamma telescope (FTI Ioffe/)
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