Castor (D-5B) [CNES]
The French Castor (D-5B) spacecraft had a 26-face polyhedron shape with a diameter of 80 cm. The primary mission objective was to study the upper atmosphere density variations. Secondary objectives included a study of gravity field perturbations and a study of micrometeorite impacts. A three-axis magnetometer was used to provide attitude information. Each one of the spacecraft faces contained a laser reflector. Data were measured either every 0.1 s or every 2.8 s. The data transmission rate was 1024 bits/s from the tape recorder and either 256 or 512 bits/s directly from telemetry. Operations were conducted by the operations center in Toulouse using the CNES network of telemetry and telecommand stations.
|Type / Application:||Science|
|Power:||Solar cells, batteries|
|Orbit:||272 km × 1271 km, 29.9°|
|Castor (D 5B)||1973-F02||21.05.1973||Ko ELD||F||Diamant-B||with Pollux (D 5A)|
|Castor (D 5B)||1975-039B||17.05.1975||Ko ELD||Diamant-BP4||with Pollux (D 5A)|