Abstract :
ProSensing Inc. has developed a G-band (183 GHz) water vapor radiometer (GVR) for long-term unattended measurements of low concentrations of atmospheric water vapor and liquid water. Precipitable water vapor (PWV) and liquid water path (LWP) are estimated from zenith brightness temperatures measured using four double-sideband receiver channels, which are centered at 183.31 1, 183.31 3, 183.31 7, and 183.31 14 GHz. A prototype ground-based version of the instrument was deployed at the Department of Energy Atmospheric Radiation Measurement program´s North Slope of Alaska site near Barrow, AK, in April 2005, where it collected data continuously for one year. This paper presents design details, laboratory test results, and examples of retrieved PWV and LWP from measured brightness temperature data.
Keywords :
atmospheric humidity; atmospheric measuring apparatus; millimetre wave detectors; radiometers; AD 2005 04; ProSensing Inc; atmospheric water vapor; frequency 183 GHz; liquid water sensing; radiometer; zenith brightness temperatures; Atmospheric measurements; Brightness temperature; Energy measurement; Information retrieval; Instruments; Laboratories; Prototypes; Radiometry; Temperature measurement; Testing; Millimeter-wave radiometry; precipitable water vapor (PWV) and liquid water path (LWP) retrieval; remote sensing;
