1970-027A
The final pair of Advanced Velas were launched in Apr 1970 and operated for ten years. Vela 6A (7033) carried X-ray detectors which carried out astronomical observations until 1978.
Launch mass was 350 kg per satellite. On orbit mass 261 kg. 98 kg kick motor full, 9 kg dry. Size 1.27 dia 26-sided polyhedron. Interstage plus payload carrier 131 kg. total payload mass 831 kg. Spun to 78 rpm in transfer, 1 rpm in final orbit.
| Vela 6A | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1970 Apr 8 | 1050:01 | Launch by Titan 3C | CK |
| T+2:02 SRM sep | |||
| T+4:18 Stage 1 MECO | |||
| T+4:19 Stage 1 sep | |||
| T+4:57 Fairing | |||
| T+7:35 SECO | |||
| 1057 | T+7:45 Stage 2 sep | ||
| 1057? | T+7:48 Transtage MES-1 -500? x 162 | ||
| 1104? | T+13:54 Transtage MECO-1 | 185 x 74547 | |
| 1538? | Transtage MES-2 at 50745 km | ||
| Transtage MECO-2 | 17300 x 111120 (s) | ||
| 1600? | Vela ejection | 17300 x 111620 | |
| 1615? | Vela sep from interstage | ||
| AKM burn at first apogee | |||
| 1970 Apr 9 | 1052 | AKM? | 6728.7 111147 x 112224 x 32.4 |
| 1970 Jul 29 | 6700.6 111102 x 111609 x 32.7 | ||
| 1971 Apr 18 | 6701.0 111135 x 111587 x 33.5 | ||
| 1978 Jan 31 | 6698.0 109531 x 113120 x 45.5 | ||
| 1978 Mar 12 | XR detectors off | ||
| 1979 Aug 29 | 6702.1 108959 x 113788 x 49.0 | ||
| 1980 Mar | End of tx? | ||
| 1980 Mar 30 | 6697.8 108332 x 114316 x 50.3 | ||
| 1981 Aug 14 | 6696.2 106928 x 115681 x 54.1 | ||
| 1984 Aug 29 | 6698.8 101258 x 121223 x 61.2 | ||
| 1990 Oct 10 | 6712.37 26926 x 196061 x 51.4 | ||
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