1994-007A
NASDA's Orbiting Reentry Experiment (OREX) was the first Japanese reentry test, carried on the initial H-II test flight. OREX, given the postlaunch name Ryusei (Meteor). The OREX project was a collaborative program with Japan's National Aerospace Lab (NAL).
The spacecraft had a mass of 865 kg at launch, 761 kg at reentry. It was 3.4m in diameter and 1.46m high, the parabolic shape covered with thermal protection tiles for HOPE spaceplane development. It landed after a 133 minute flight in the Pacific Ocean.
Reentry analyses give the following conditions: T+7396s, 92.8 km altitude, 7.545km/s; T+7461s, 63.6 km altitude, 6.223 km/s. The velocities are Earth-relative and the entry angle was not reported, so the exact trajectory is unclear.
| Ryusei | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1994 Feb 3 | 2220:00? | Launch by H-II (H-2-1F) | TNSC |
| 2221 | SRB sep (T+1:37) 40 km | ||
| 2223 | Fairing sep (T+3:45) | ||
| 2226 | LE-7 MECO, (T+6:01) 227 km | -4800? x 370? x 30 | |
| LE-7 sep T+6:09 | |||
| 2226 | LE-5A TIG (T+6:15) | ||
| 2233 | LE-5A MECO1 (T+13:16), 454 km | ||
| 2233:50 | OREX sep (T+13:50) | 93.66 448 x 458 x 30.5 | |
| 1994 Feb 4 | 0001:03 | T+1:41:03 Deorbit burn at apogee over 30N | 450 x 454 x 30.51 |
| 0005:48 | T+1:45:48 Deorbit burn complete | -216 x 460 x 30.51 | |
| 0022:05 | 120 km Reentry (Vrel 7.325, -3.17 deg) | ||
| 0022:41 | 105 km, 7.451 m/s | ||
| 0023:03 | T+2:03:03 80 km, 7.42km/s | ||
| 0025:01 | 48 km, 3.0 km/s | ||
| 0033:02 | Landed 459 km S of Christmas Island | ||
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