Astronomy and Astrophysics – Astronomy
Scientific paper
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.
Cheng Zong-Yi
Liao X.-H.
Song Shu-Li
Zhu Wen-Yao
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