1967-051A
The next regular IMP mission was IMP F (Interplanetary Monitoring Platform F), the first IMP launch into polar orbit. After launch, it became Interplanetary Monitoring Platform 4 or Explorer 34. Launch was 1967 May 24 by Delta E from SLC2 at Vandenberg into a 242 x 214383 km x 67.2 deg orbit. It operated until 1969 Apr 28 and reentered on 1969 May 4.
| IMP 4 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1967 May 24 | 1405:54 | Launch by Delta E | V SLC2 |
| 1408:24 | T+2:30 Thor MECO | ||
| 1408:28 | T+2:34 Delta burn 6:23 | ||
| 1408:51 | T+2:57 Fairing | ||
| 1414:48 | T+8:54 Delta SECO | -1580? x 251 x 67.2 | |
| T+12:59 Spinup | |||
| 1419:08 | T+13:14 FW-4D burn 30s | ||
| 1419:39 | T+13:45 FW-4D burnout | ||
| 1420:08 | T+14:14 Despin | ||
| T+14:29 Solar paddle deploy | |||
| T+14:39 Magnetometer boom deploy | |||
| 1421:03 | T+15:09 FW-4D sep | ||
| 1967 May 24 | 6358.34 242 x 214381 x 67.2 | ||
| 1967 May 26 | TRW experiment cover released | ||
| 1967 Jun 12 | TRW experiment failed | ||
| 1968 Jan 13 | 6233.63 3460 x 208179 x 67.6 | ||
| 1968 Feb 25 | 6208.80 3896 x 207147 x 71.5 | ||
| 1969 Jan 19 | 6218.35 2031 x 209241 x 68.5 | ||
| 1969 Feb 1 | 6223.03 1920 x 209465 x 69.5 | ||
| 1969 Feb 18 | 6215.50 1592 x 209612 x 71.6 | ||
| 1969 Apr 28 | end of ops | ||
| 1969 Apr 29 | Skip reentry over N Australia, remained in orbit | ||
| 1969 May 4 | Reentered | ||
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