A 300 element spatial radiometer was recently flown as part of the SPIRiT II experiment. This instrument, housed in a high-off-axis-rejection telescope cooled to liquid helium temperatures, measured the spatial structure within six LWIR spectral bands of the earth's limb. The radiometer used hybrid multiplexed focal planes with BIB detectors. The use of this technology enabled several enhancements to system performance. New data collection and analysis tools contributed significantly to the development and enhancement of this radiometer. Postflight analysis shows that the radiometer performed well during its sounding rocket flight.
John C. Kemp,
Kirk D. Larsen,
E. Ray Huppi,
"SPIRIT II: rocketborne spatial radiometer", Proc. SPIE 2019, Infrared Spaceborne Remote Sensing, (1 October 1993); doi: 10.1117/12.157837; https://doi.org/10.1117/12.157837