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Explorer: SE C (Solrad 10)

Explorer 44 (Solrad 10) [NASA]

Solrad 10 or SE C or Explorer 44, a spin-stabilized satellite, was one of the Solrad series designed to provide continuous coverage of wavelength and intensity changes in solar radiation in the UV, soft, and hard X-ray regions. Solrad 10 also mapped the celestial sphere using a high-sensitivity X-ray detector.

The spacecraft was a 12-sided cylinder that measured 76 cm in diameter and 58 cm in height. Four symmetrically placed 17.8-by 53.3-cm solar cell panels, hinged at the central section of the structure, served as the elements of a turnstile antenna system. Eighteen solar sensors were mounted pointing parallel to the spin axis of the satellite, which pointed directly at the solar disk. The plane of rotation shifted about 1 deg/day so that a stellar detector mounted to point radially outward from the axis scanned the celestial sphere. Data from all detectors were stored in a 54-kbs core memory and telemetered on command to the NRL tracking station at Blossom Point, MD. Data were also transmitted in real time at 137.710 MHz.

Nation: USA
Type / Application: Research
Operator: NASA, NRL
Contractors: Naval Research Laboratory (NRL)
Propulsion: ?
Power: 4 deployable fixed solar arrays, body mounted solar cells, batteries
Mass: 260 kg
Orbit: 436 km × 630 km, 51
Satellite COSPAR Date LS Launch Vehicle Remarks
Explorer 44 (SE C, Solrad 10, NRL-PL 165) 1971-058A 08.07.1971 WI LA-3 Scout-B