Estimation of slant water vapor along GPS ray paths

Details Estimation of slant water vapor along GPS ray paths Estimation of slant water vapor along GPS ray paths

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004acasn..45..338s&link_type=abstract

Acta Astronomica Sinica, vol. 45, no.3, p. 338-346

Astronomy and Astrophysics

Astronomy

4

Gps, Slant Water Delay, Slant Water Vapor

Scientific paper

Slant water vapor (SWV) measurements along GPS ray paths have the potential to be useful in reconstructing three dimensional water vapor field, which is the key problem of GPS meteorology. A direct method of estimating SWV using GPS non-difference LC observation combinations without the effect of ionosphere. Comparing with Water Vapor Radiometer(WVR) measurements showed that it can get millimeter level accuracy of SWV estimated by this method every 30 seconds. The difference between the averages of SWV in 5 minutes after scaled to zenith and PWV estimated directly by GIPSY very 5 minutes is less than 2mm. SWV obtained by the this method can be used in tomography to sense the three dimensional structure of water vapor and improve the initial conditions of numerical weather forecast. It’s also useful in correcting the error of GPS geodesy and radar images.

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