Controlled generation and absolute calibration of radiant incidance in low-background test facilities for infrared space sensors.
Meaningful prelaunch calibrations of ir sensors designed to be operated from space platforms require lowbackground test facilities that permit both the controlled generation and the absolute calibration of radiant incidance over wide dynamic ranges. Such a test facility is presently under development. It comprises a source assembly, a collimator, and a spectroradiometer. The source can emit either broadband or monochromatic radiation. In conjunction with a reference blackbody, the spectroradiometer monitors both the radiant incidance and the spectral distribution of the flux that enters the sensor under test.
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