1999-021A
Uosat is a 325 kg Minisat-400 from SSTL. The imaging payload includes a wide angle camera, a high res camera, and multispectral cameras. The satellite has a gravity gradient boom but it was not deployed since momentum wheels were used instead.
Launch 1999 Apr 21 by Dnepr RS-20K (RS-20 based). The R-36MUTTKh (RS-20) can have an S5M or Fregat third stage but on this flight was a minimally modified two-stage vehicle with a post-boost third stage. Uosat 12 was placed in circular orbit together with a fairing part, following which the post-boost stage made a depletion burn to enter eccentric orbit.
Dnepr is marketed by ISC Kosmotras/Kiev. It can launch 3000 kg to 500 km. NK9903 says it's based on 15A14 R-36M not 15A18M R-36M2 but NK9906 says it's 15A18 (R-36M1).
N2O4/UDMH stages, stage 2 is RD-0256 by KBKhA.
| UoSAT | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1999 Apr 21 | 0459:12 | Launch by Dnepr | KB PL108 |
| 0500:58 | T+1:46 Stage 2 VES | ||
| 0500:59 | T+1:47 Stage 1 MECO | ||
| 0501:02 | T+1:50 Stage 1 sep | ||
| 0501:05 | T+1:53 Stage 2 MES | ||
| 0503:38 | T+4:26 Stage 2 MECO | ||
| 0503:48 | T+4:36 GO sep | ||
| 0503:53 | T+4:41 Stage 2 VECO | ||
| 0503:56 | T+4:44 RS burn | ||
| 0510 | T+11:40 control to Gol-2 | ||
| 0513:47 | T+14:35 Plume shield sep | ||
| 0513:48 | T+14:36 Uosat sep | 638 x 652 x 64.6 | |
| 0514:48 | T+15:36 Stage 3 RS cutoff | 599 x 1403 x 64.6 | |
| 1999 Jul 2 | Begin cold gas test | ||
| 1999 Jul 7? | 120s burn, 0.2km height adjust | ||
| 2001 Jan | HTTP server test from space | ||
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