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A technique for measuring vertically and horizontally polarized microwave brightness temperatures using electronic polarization-basis rotationThis technique for electronically rotating the polarization basis of an orthogonal-linear polarization radiometer is based on the measurement of the first three feedhorn Stokes parameters, along with the subsequent transformation of this measured Stokes vector into a rotated coordinate frame. The technique requires an accurate measurement of the cross-correlation between the two orthogonal feedhorn modes, for which an innovative polarized calibration load was developed. The experimental portion of this investigation consisted of a proof of concept demonstration of the technique of electronic polarization basis rotation (EPBR) using a ground based 90-GHz dual orthogonal-linear polarization radiometer. Practical calibration algorithms for ground-, aircraft-, and space-based instruments were identified and tested. The theoretical effort consisted of radiative transfer modeling using the planar-stratified numerical model described in Gasiewski and Staelin (1990).
Document ID
19920016142
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Gasiewski, Albin J.
(Georgia Inst. of Tech. Atlanta, GA, United States)
Date Acquired
September 6, 2013
Publication Date
April 13, 1992
Subject Category
Spacecraft Instrumentation
Report/Patent Number
NASA-CR-190207
NAS 1.26:190207
Report Number: NASA-CR-190207
Report Number: NAS 1.26:190207
Accession Number
92N25385
Funding Number(s)
CONTRACT_GRANT: NAG8-829
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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