G-Band Vapor Radiometer Profiler (GVRP) Handbook

Caddeau, M. P.

Pacific Northwest National Laboratory (U.S.)

关键词: Water Vapor;    Manuals;    Brightness;    Radiometers;    Ghz Range 100-1000;   

DOI  :  10.2172/982364
RP-ID  :  DOE/SC-ARM/TR-091
RP-ID  :  DE-AC02-06CH11357
RP-ID  :  982364

美国|英语

来源: UNT Digital Library

【 摘 要 】

The G-Band Vapor Radiometer Profiler (GVRP) provides time-series measurements of brightness temperatures from 15 channels between 170 and 183.310 GHz. Atmospheric emission in this spectral region is primarily due to water vapor, with some influence from liquid water. Channels between 170.0 and 176.0 GHz are particularly sensitive to the presence of liquid water. The sensitivity to water vapor of the 183.31-GHz line is approximately 30 times higher than at the frequencies of the two-channel microwave radiometer (MWR) for a precipitable water vapor (PWV) amount of less than 2.5 mm. Measurements from the GVRP instrument are therefore especially useful during low-humidity conditions (PWV < 5 mm). In addition to integrated water vapor and liquid water, the GVRP can provide low-resolution vertical profiles of water vapor in very dry conditions.