1990-028A
Pegsat was a test satellite for the first Pegasus launch and it remained attached to the Pegasus Orion 38 third stage motor. Developed by NASA-Goddard and built in-house, it carried Barium release canisters left over from the CRRES program as a bonus scientific experiment. The NB52 008 carrier aircraft took off from RW04/22 at Edwards AFB at 1803 on 1990 Apr 5 and flew out over the Point Arguello Warning Area 80 km W of Vandenberg AFB. At 1910:17 the B-52 dropped the Pegasus at an altitude of 13 km. First stage ignition was at 1910:22, burnout at 1911:38 at an altitude of 70 km. Stage 2 ignited at 1911:47 at 76 km, and burnt out at 1912:59 at 198 km. The second and third stages remained attached for a coast period, then at 1918:39 the second stage separated and stage 3 ignited for a 66 s burn at 537 km altitude. Earth orbit insertion was at 1919:45 into a 508 x 687 km x 94.2 deg orbit. The first barium canister was released on 1990 Apr 15; the second was probably released on 1990 Apr 17.
| Pegsat | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1990 Apr 5 | 1803 | B-52 takeoff EAFB | |
| 1910:15 | Drop 13.2km | ||
| 1910:20 | Stage 1 burn | ||
| 1911:35 | T+1:20 Stage 1 cutoff, 70 km | ||
| 1911:43 | T+1:28 Stage 1 sep | ||
| 1911:45 | T+1:30 Stage 2 burn | ||
| 1912:10 | T+1:50 Fairing sep | ||
| 1912:59 | T+2:39 Stage 2 cutoff, 198 km | ||
| 1918:39 | T+8:19 Stage 2 sep | ||
| 1918:39 | Stage 3 burn, 537 km, 2.5 deg 4.552 km/s | ||
| 1919:45 | T+9:25 Stage 3 cutoff 7.580 | ||
| 1919:47 | SECS/TERCEL sep | |
| 1921:32 | Stage 3 end of tx | ||
| 1990 Apr 16 | Canister R1 sep | ||
| 0545:07 | Canister R1 release Ba at 244E | ||
| 1990 Apr 25 | Canister R2 sep | ||
| 0449:01 | R2 release Ba | ||
| 1991 Jan? | end of ops | ||
| 1996 Nov 14 | Reentered | ||
No comments:
Post a Comment