Thursday 25 August 2005

G7

PTH0069
An experience for region-wide computation of water vapor pressure of the atmosphere by GPS observations
Ardalan, Alireza¹
1 University Of Tehran, Depatment of Surveying and Geomatics Eng., Iran
Author email: ardalan@ut.ac.ir
Four permanent GPS stations in Iran, Bahrain, Kazakhstan, and Armenia are used for a region-wide estimation of atmospheric Water Vapor Pressure (WVP). The accuracy of the estimated WVP is computed by computing Zenith Total Delay (ZTD) from atmospheric WVP and comparing with those observed at the aforementioned stations for a period of 2 days. Correlation coefficient between the observed and computed ZTD indicates the success of the applied method for computations of region-wide atmospheric WVP. Numerical details and the results of the test computations will be presented.

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