ODERACS (Orbital Debris Radar Calibration Sphere)
ODERACS (Orbital Debris Radar Calibration Sphere) is a series of microsatellites launched from the Space Shuttle to help calibrate ground-based radar used for keeping track of spacecraft debris in orbit.
| spacecraft | deployment date | mission | orbit | mass (kg) |
| ODERACS A-F | Feb 3, 1994 | STS-60 | 327-338 × 352-356 km × 57.0° | 1-5 |
| ODERACS 2 A-F | Feb 4, 1995 | STS-63 | 177-268 × 179-280 km × 51.6° | 1-5 |
