Variability in the measurement of radar backscatter

A variety of systems and platforms have been used over the past three decades to acquire radar backscatter data of terrain. The variability in the reported data was evaluated for agricultural crops under "similar" phenological conditions and for approximately the same sensor parameters (fr...

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Bibliographic Details
Published in:I.R.E. transactions on antennas and propagation 1976-11, Vol.24 (6), p.896-898
Main Authors: Bush, T., Ulaby, F.
Format: Article
Language:English
Subjects:
Antenna theory
Antennas and propagation
Backscatter
Dipole antennas
Insulation
Radar antennas
Radar cross section
Radar measurements
Radar remote sensing
Spaceborne radar
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Summary:A variety of systems and platforms have been used over the past three decades to acquire radar backscatter data of terrain. The variability in the reported data was evaluated for agricultural crops under "similar" phenological conditions and for approximately the same sensor parameters (frequency, polarization, and angle of incidence). The evaluation reveals wide variations in the magnitude of the scattering coefficient among different measurement programs. While it is difficult to determine the exact causes of these variations it is quite evident that extreme care must be employed in 1) monitoring the measurement system transfer function, 2) calibrating the system on an absolute basis, and 3) acquiring and reporting detailed target parameter information.
ISSN:0018-926X
0096-1973
1558-2221
DOI:10.1109/TAP.1976.1141431