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Mobile spectrometer measures radar backscatterThe present article is concerned with a helicopter-borne spectrometer (Heloscat), which has been developed to permit high-quality scattering measurements from a mobile platform at remote sites. The term 'spectrometer' referes to a class of scatterometers. The term 'scatterometer' is employed to denote a specialized radar for measuring scattering coefficients as a function of angle. A spectrometer, on the other hand, is a scatterometer which can measure backscatter at several frequencies. The Heloscat system is discussed, taking into account two antennas, RF hardware, and an externally mounted pendulum for angle encoding. A dual-antenna configuration is used for cross-polarized measurements, while a single-antenna system is used for like-polarized measurements. Attention is also given to oscillator characteristics, efficient data handling, and aspects of calibration.
Document ID
19840066408
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gogineni, S.
(Kansas Univ. Center for Research, Inc. Lawrence, KS, United States)
Moore, R. K.
(Kansas Univ. Center for Research, Inc. Lawrence, KS, United States)
Onstott, R. G.
(University of Kansas Center for Research, Inc., Lawrence KS, United States)
Kim, Y. S.
(Florida Atlantic University Boca Raton, FL; University of Kansas Center for Research, Inc., Lawrence, KS, United States)
Bushnell, D.
(Kohlman Systems Corp.; University of Kansas Center for Research, Inc., Lawrence, KS, United States)
Date Acquired
August 12, 2013
Publication Date
September 1, 1984
Publication Information
Publication: Microwaves & RF
Volume: 23
ISSN: 0745-2993
Subject Category
Instrumentation And Photography
Accession Number
84A49195
Funding Number(s)
CONTRACT_GRANT: N0014-76-C-1105
CONTRACT_GRANT: NAGW-334
Distribution Limits
Public
Copyright
Other

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