1958-002B
The Vanguard test satellite carried on TV-4 was the first to reach orbit, becoming Vanguard I. The TV4 payload was used for geodetic measurements. Stage 2 of TV-4 was tank 427750, TCA C-12.
| Vanguard 1 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1958 Mar 17 | 1215:41 | Launch by Vanguard TV4 | CC |
| 1218:05 | T+2:24 Stage 1 sep | ||
| 1218:33 | T+2:52 Fairing sep | ||
| 1220:07 | T+4:26 Stage 2 cutoff | ||
| 1225:35 | T+9:54 Stage 2 sep | ||
| 1225:47 | T+10:06 Stage 3 burn | -5600 x 650 x 34.3? | |
| Stage 3 cutoff | |||
| 1226:45 | T+11:04 Stage 3 sep | 650 x 3968 x 34.25 | |
| 1964 Mar | End of transmissions | ||
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