REX - .
Payload: REX 1. Mass: 85 kg (187 lb). Nation: USA.
Agency: USAF Rome.
Class: Earth.
Type: Ionosphere satellite. Spacecraft Bus: GemStar.
Spacecraft: REX.
USAF Sat Cat: 21527 . COSPAR: 1991-045A. Apogee: 869 km (539 mi). Perigee: 767 km (476 mi). Inclination: 89.50 deg. Period: 101.30 min. Radiation Experiment; tested communications components in high radiation environment. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B)..