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|Author(s):||Ronald C. Wittmann; Amanda Cox; Randy Direen;|
|Title:||Proximity effects in the calibration of microwave radiometers|
|Published:||October 01, 2005|
|Abstract:||Microwave, total-power radiometers are calibrated by observing sources of known brightness temperature. Free-space calibrations are usually performed assuming far-field interactions, although the actual calibration source may be well into the near-field region of the radiometer antenna. Here, we simulate the free-space coupling between radiometer and calibration target to explore the potential contribution of proximity effects to measurement uncertainty.|
|Conference:||Antenna Measurement Techniques Association|
|Proceedings:||Proc., Antenna Meas. Tech. Asoc. Symp.|
|Pages:||pp. 333 - 336|
|Dates:||October 30-November 4, 2005|
|Keywords:||calibration,microwave,near-field gain,radiometer,remote sensing,uncertainty analysis|