Mechanical design of the Crosstrack Infrared Sounder (CrIS)

Details Mechanical design of the Crosstrack Infrared Sounder (CrIS) Mechanical design of the Crosstrack Infrared Sounder (CrIS)

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4486..445k&link_type=abstract

Proc. SPIE Vol. 4486, p. 445-455, Infrared Spaceborne Remote Sensing IX, Marija Strojnik; Bjorn F. Andresen; Eds.

Physics

Optics

Scientific paper

The mechanical design characteristics of the CrIS sensor module is presented. Several structural and thermal challenges are addressed. An 8-cm optical system, which includes a scanner, interferometer, 25-cm focal length telescope, aft optics, and cooler, efficiently use the available volume (0.158 m3). The sensor manages 90 Watts of electronic dissipation while maintaining a stable radiometric environment. It uses multi-stage passive cooling to provide 81 K focal plane and 220 K aft optics temperatures for low-earth orbits at up to 90-degree orbit normal-to-sun angles. Structurally, the interferometer scanning mirror maintains pointing accuracy of less than 20 microradians in the presence of self-induced and external disturbances.

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