1997-005A
The VSOP (VLBI Space Observatory Program) was a project to do radio astronomy using spaceborne Very Long Baseline Interferometry. The space segment of VSOP was the MUSES-B satellite, named Haruka (`far-away') after launch. Mass of Haruka was 830 kg including 62 kg of RCS prop and 246 kg dish antenna. It has a 10m (8m effective) deployable dish with a central boom carring the subrelector. The main spacecraft is a 1.5m dia, 1.0m high box with 2 solar panels. MUSES B was built by NEC.
The second Mu Space Experiment System (MUSES B) was the 16th ISAS scientific satellite, to test large space structures and provide the first orbiting VLBI radio observatory. Initial orbit is 200 x 20000 km, with perigee raising maneuvers into a 1000 x 20000 km. The spacecraft has a box shaped bus, with 2 solar panels and the antenna. Haruka has also been assigned the English homonym HALCA (Highly Advanced Laboratory for Communications and Astronomy).
This was the first launch of the M-V rocket. A KM-V1 fourth stage kick motor was added. The third stage was not cataloged until 1999, when two objects were found in orbits with apogees of 1263 and 1674 km.
| Haruka VSOP | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1997 Feb 12 | 0450:00 | Launch by M-V-1 | Kagoshima |
| Stage 1 burnout | |||
| 0451:15 | Stage 1 sep T+1:15s | ||
| 0452:37 | Stage 2 burnout T+2:37 | ||
| 0453:17 | Fairing T+3:17s | ||
| 0453:31 | -4962 x 224 x 31.1 | ||
| 0453:33 | Stage 2 sep T+3:33s | ||
| 0453:39 | Stage 3 burn T+3:39 | ||
| 0455:33 | T+5:33 St 3 burnout | ||
| 0455:33 | Spinup T+333s | ||
| 0455:39 | Stage 3 sep T+5:39s | 233 x ? x 31.2 | |
| 0455:43 | KM-V1 burn T+5:43s 71s? | ||
| KM-V1 burnout | |||
| 0457:57 | KM-V1 sep T+7:57s | 233 x 21527 x 31.2 | |
| Yo-yo deploy T+8:00 | |||
| Solar panel deploy T+90min | |||
| Orbit raise | |||
| 1997 Feb 14 | TCM1 | ||
| 1997 Feb 16 | TCM2 | ||
| 1997 Feb 21 | TCM3 | ||
| 1997 Feb 24 | Sub-reflector deployed | ||
| 1997 Feb 27 | Main antenna deploy begins | ||
| 1997 Feb 28 | Antenna deploy complete | ||
| 1997 Mar 30 | Eclipse period begins | ||
| 1997 Apr | First fringes at 1.6 GHz | ||
| 1998 Aug 30 | Computer problem, observing halted | ||
| 1998 Dec 10 | Computer rebooted | ||
| 1999 Oct | Gyro problem, | ||
| 1999 Dec | Resume observing | ||
| 1999 Dec | Orbit lower | ||
| 2000 Feb | Resume attitude control | ||
| 2000 Mar 8 | Resume observing | ||
| 2003 Oct | end of VSOP observations | ||
No comments:
Post a Comment