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A balloon-borne cryogenically cooled filter radiometerThe development of a cryogenically cooled filter radiometer for use with high altitude balloons is discussed. The radiometer has features which include the options for remote operation of two filter wheels each containing six filters at helium temperature and a cryogenic rotary chopper which may be run at 200 cycles per second or positioned open or closed, and a remotely operable chopped blackbody calibration source. The radiometer contains a ten inch diameter liquid nitrogen cooled Cassegrain telescope with nine individually filtered field stops in the focal plane. The telescope is mounted on a two-axis servo operated gimbal which is used to make sky scans under the control of an onboard programmer.
Document ID
19750004673
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Debell, A. G. (Rockwell International Corp. Canoga Park, CA, United States)
Date Acquired
August 8, 2013
Publication Date
November 1, 1974
Publication Information
Publication: NASA. Ames Res. Center Telescope Systems for Balloon-Borne Res.
Subject Category
Instrumentation And Photography
Accession Number
75N12745
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19750004663Collected WorksTelescope Systems for Balloon-Borne Research
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