Title :
Measurement of small antenna reflector losses for radiometer calibration budget
Author_Institution :
Dept. of Electromagn. Syst., Tech. Univ. Denmark, Lyngby, Denmark
fDate :
7/1/1997 12:00:00 AM
Abstract :
Antenna reflector losses play an important role in the calibration budget for a microwave radiometer. If the losses are small, they are difficult to measure by traditional means. However, they can be assessed directly by radiometric means using the sky brightness temperature as incident radiation. This paper describes how such measurements are carried out as well as a suitable experimental setup. The main reflector of the European Space Agency´s MIMR system is used to demonstrate the principle
Keywords :
antenna testing; atmospheric measuring apparatus; atmospheric techniques; calibration; geophysical equipment; geophysical techniques; microwave antennas; microwave measurement; millimetre wave antennas; millimetre wave measurement; oceanographic equipment; oceanographic techniques; radiometers; radiometry; reflector antennas; remote sensing; ESA; MIMR; atmosphere; equipment; geophysical measurement technique; incident radiation; instrument; land surface; meteorology; microwave radiometer; microwave radiometry; ocean; radiometer calibration; radiometer calibration budget; satellite remote sensing; sea surface; sky brightness temperature; small antenna reflector loss; terrain mapping; Antenna measurements; Brightness temperature; Calibration; Instruments; Loss measurement; Microwave radiometry; Reflection; Reflector antennas; Temperature measurement; Temperature sensors;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
