Title :
Channel ranking in passive microwave wet-path delay measurements
Author_Institution :
Sch. of Electr. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
Discrete optimization by channel ranking is used to study the utility of various radiometric channel combinations near the 22.235-GHz water vapor line for use in spaceborne wet path delay measurements. The study is based on brightness data from a combined statistical geophysical and radiative transfer model. Retrieval simulations show that most of the available information on wet path delay can be obtained from a pair of closely spaced channels located on one of the two wings of the 22.235 water vapor line. The results of the optimization study provide a quantitative basis for assessing performance and cost tradeoffs in spaceborne hardware design
Keywords :
atmospheric techniques; oceanographic techniques; radiometry; radiowave propagation; remote sensing by radar; tropospheric electromagnetic wave propagation; 22.235 GHz; atmosphere; calibration; channel ranking; discrete optimization; dynamics; measurement technique; microwave SHF; ocean surface altitude; passive microwave wet path delay; radar altimetry method; radar remote sensing; radiative transfer model; radiometric channel; radiowave propagation; retrieval simulation; sea surface height; troposhere; water vapor line; Atmospheric modeling; Clouds; Delay; Frequency; Microwave measurements; Microwave radiometry; Ocean temperature; Sea measurements; Sea surface; Spaceborne radar;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1993. IGARSS '93. Better Understanding of Earth Environment., International
Conference_Location :
Tokyo
Print_ISBN :
0-7803-1240-6
DOI :
10.1109/IGARSS.1993.322417
