HEAO 3 [NASA]
The HEAO 3 (High-Energy Astronomy Observatory 3) mission performed a sky survey of gamma rays and cosmic rays in a manner similar to HEAO 1. It had a higher orbital inclination than the previous missions in this series, since the payload consisted primarily of cosmic-ray instrumentation; greater cosmic-ray flux occurs near the earth's magnetic poles. The scientific objectives of the mission were
The normal operating mode was a continuous celestial scan about the Z axis (which nominally pointed to the sun).
HEAO 3 featured a Gamma ray spectrometer with 4 cryogenically cooled germanium detectors, each with an energy range of 50 keV.to 10 MeV.
Experiments on board were:
|Type / Application:||Astronomy, X-Ray, Gamma|
|Equipment:||Gamma ray spectrometer|
|Power:||Solar cells, batteries|
|Orbit:||485 km × 501 km, 43.6°|
|HEAO 3||1979-082A||20.09.1979||CC LC-36B||Atlas-SLV3D Centaur-D1AR|