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Errors due to the reflectivity of calibration targets



James P. Randa, Dave K. Walker, Amanda Cox, Robert L. Billinger


For a microwave total-power radiometer, we consider the error introduced by neglecting the difference in the antenna reflection coefficient between when it views a distant scene and when it views a nearby calibration target. An approximate expression is presented for the error and measurement results are presented that enable one to estimate the resulting uncertainty in the measured brightness temperature. This uncertainty ranges from about 0.1 K to several kelvins for the representative cases considered.
Proceedings Title
International Geoscience and Remote Sensing Symposium, IGARSS-2004
Conference Dates
September 20-24, 2004
Conference Location
Anchorage, AK, USA


calibration, calibration target, microwave radiometer, radiometer, remote sensing, uncertainty analysis


Randa, J. , Walker, D. , Cox, A. and Billinger, R. (2004), Errors due to the reflectivity of calibration targets, International Geoscience and Remote Sensing Symposium, IGARSS-2004, Anchorage, AK, USA, [online], (Accessed April 24, 2024)
Created September 19, 2004, Updated October 12, 2021