ODERACS-2 (Orbital Debris Radar Calibration Sphere 2) was a series of six spheres deployed from the shuttle missionSTS-63, ODERACS-2A through -2. The purpose of theOrbital Debris Radar Calibration Sphere experiment was to calibrate theradars andtelescopes used for orbital debris measurements by putting passive objects of known size and shape into orbit. The objects were 2, 4, and 6 inch spheres and three wiredipoles.^[1]

The ODERACS satellites launched aboard theSpace ShuttleDiscovery on 4 February 1995, at 04:57 fromKennedy Space Center'sLaunch Pad 39B alongsideSpartan 204-F1. They were placed into a 51.6° orbit.

• ODERACS 2ANational Space Science Data Center (NASA GSFC) This article incorporates text from this source, which is in thepublic domain.

• Microsatellites
• 1995 in spaceflight
• Radar calibration satellites

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