Title :
On-orbit microwave blackbody calibration using regions of dense vegetation
Author :
Brown, Shannon ; Ruf, Chris
Author_Institution :
Michigan Univ., Ann Arbor, MI, USA
Abstract :
Brightness temperatures (TBs) from satellite microwave radiometers need to be calibrated on-orbit at the hottest and coldest ends of the dynamic TB spectrum. A method is developed to determine hot reference calibration TBs from SSM/I TB data for other radiometers operating between 18-40 GHz and 0-55 degrees incidence. Regions of optically thick vegetation in the Amazon rainforest are chosen as calibration targets. Hot reference temperatures for the on-orbit calibration of microwave radiometers are determined for these regions.
Keywords :
blackbody radiation; brightness; calibration; forestry; radiometers; radiometry; vegetation mapping; 18 to 40 GHz; Amazon rainforest; SSM/I TB data; brightness temperatures; dense vegetation regions; dynamic brightness temperatures; hot reference calibration; on-orbit microwave blackbody calibration; satellite microwave radiometers; Atmospheric measurements; Brightness temperature; Calibration; Frequency; Ocean temperature; Optical scattering; Optical surface waves; Radiometers; Sea surface; Vegetation;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2003. IGARSS '03. Proceedings. 2003 IEEE International
Print_ISBN :
0-7803-7929-2
DOI :
10.1109/IGARSS.2003.1295559
