Global Positioning System (GPS) has been used to obtain tropospheric precipitable water vapor (PWV) for applications in the atmospheric sciences.
GPS-Met observations provide all-weather, hightime-resolution precipitable water vapor (PWV) with accuracy comparable to that of radiosondes (e.
Precipitable water vapor estimates from homogeneously reprocessed GPS data: an intertechnique comparison in Antarctica.
Accuracy of absolute precipitable water vapor estimates from GPS observations.
Matrosov, "Analysis of integrated cloud liquid and precipitable water vapor retrievals from microwave radiometers during the Surface Heat Budget of the Arctic Ocean project," Journal of Geophysical Research, Vol.
Klein, "Measurement of low amounts of precipitable water vapor using ground-based millimeterwave radiometry," Journal of Atmospheric and Oceanic Technology, Vol.
And you know that each NDGPS reference location also contains precipitable water vapor
sensors that have increased the accuracy of the precipitation forecasts from the National Weather Service.
According to Seth Gutman, a systems analyst in FSL's Demonstration Division and the GPS integrated precipitable water vapor
(GPS-IPW) project leader, GPS satellite radio signals are slowed by the earth's atmosphere, which results in a delay in the arrival of a signal as compared to propagation in free space.
The 14 receivers will be deployed in Yanqing District and Miyun District of Beijing, where two major water reservoirs are located, to detect precipitable water vapor
in the atmosphere above the area and improve weather forecast service to the public.
Global Navigation Satellite System (GNSS) meteorology, which provides all-weather, high-frequency (5 min), precipitable water vapor
estimates, can help.
Precipitable water vapor
(PW) estimates derived from continuously operating ground-based GPS receivers have been available for some time from NOAA's GPS-Met program, but these observations have been of limited utility to operational forecasters in part due to poor spatial resolution.
Figure 4b shows the global distribution of precipitable water vapor
as derived from MODIS on board the Terra satellite from 2000 to 2009.