Title :
Optimisation of tipping curve calibration of microwave radiometer
Author :
D´Orazio, A. ; De Sario, M. ; Gramegna, T. ; Petruzzelli, V. ; Prudenzano, F.
Author_Institution :
Dipartimento di Elettronica ed Elettrotecnica, Politecnico di Bari, Italy
fDate :
6/12/2003 12:00:00 AM
Abstract :
Absolute calibration is a fundamental task to guarantee the accuracy of microwave radiometer measurements. The influence of a few factors (radiometer antenna pattern, radiometer pointing error, system random noise and the effect of Earth curvature), on the tipping curve calibration process is shown. It is found that an accurate tipping curve is obtained when a high number of observation angles, not under the horizontal line, is considered.
Keywords :
antenna radiation patterns; calibration; microwave measurement; radiometers; random noise; Earth curvature; absolute calibration; antenna pattern; microwave radiometer; observation angles; pointing error; system random noise; tipping curve calibration;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20030622
