1972-014A
The TD-1A satellite was ESRO's first astronomy satellite, the TD standing for Thor Delta (the launch vehicle). It was built by Matra and controlled from the ESOC facility, TD-1A made the first ultraviolet stellar sky survey. The early loss of the satellite’s tape recorders meant that extra tracking stations were pressed into service.
| TD-1A | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1972 Mar 12 | 0155:08 | Launch by Delta N | V |
| SRM sep | |||
| 0158:45 | T+3:37 MECO | ||
| T+3:39 St 1 sep | |||
| 0158:48 | T+3:40 SES-1 6:21 | ||
| T+3:56 Fairing sep | |||
| 0205:03 | T+9:55 SECO-1 | ||
| 0245:36 | T+50:28 SES-2 | ||
| 0245:40 | T+50:32 SECO-2 | ||
| 0247 | T+52:07 Delta sep | 95.4 524 x 551 x 97.6 | |
| 1972 Mar 15 | 1-m optics cover ejected | ||
| 1972 Apr 19 | No.2 tape recorder problem | ||
| 1972 May 23 | No.1 tape recorder failed | ||
| 1973 Oct | S59 and S2/68 switched off; S77 on | ||
| 1973 Dec | S2/68 back on for airglow | ||
| 1974 May 5 | end of stabilization | ||
| 1975? | end of transmissions | ||
| 1980 Jan 9 | Reentered | ||
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