1966-087A
ESSA III was the first of a new series of Tiros Operational Satellites, called TOS A before launch. It was the first Tiros satellite to be launched directly to polar orbit from Vandenberg Air Force Base in California. Launch by Delta E from Space Launch Complex 2-East was at 1039 on 1966 Oct 2, with orbit insertion at 1057 into a 1383 x 1493 km x 101.1 deg, 2:30pm sun-synchronous orbit. ESSA III replaced ESSA I as the prime global satellite until 1967 Jun 1 when it was placed on standby. ESSA III transmitted until 1968 Oct 9.
| ESSA 3 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1966 Oct 2 | 1039:03 | Launch by Delta E | SLC2E |
| T+0:43 SRM out | |||
| T+1:10s SRM sep | |||
| 1041:34 | T+2:31 Thor S/N 20206 MECO | ||
| 1041:38 | T+2:35 Thor sep | ||
| 1041:38 | T+2:36 Delta S/N 20205 burn 6:03 | ||
| 1041:42 | T+2:39 Fairing | ||
| 1047:41 | T+8:49 Delta SECO 363 km, 5.790 km/s | -4700? x 1382? | |
| 1057 | T+18:20? Delta sep | ||
| 1057:26 | T+18:23 X-258 RH-89 burn 23s at 1388 km 5.089 km/s | -3735 x 1413 x 101.1 | |
| 1057:49 | T+18:46 X-258 burnout at 1388 km 7.1623 km/s | ||
| 1059:11 | T+20:08 X-258 sep | 1383 x 1493 x 101.1 | |
| 1059:19? | Stage 3 yo weight | ||
| 1107? | ESSA Yo weights | ||
| 1967 Jun 1 | On standby | ||
| 1968 Oct 9 | End of ops | ||
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