Ȕ N 7, 2012

GPS

 

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Abstract: It is shown, that existing methods of GPS measurements of total amount of precipitable water doesnt accounted for regularities of variation of low clouds optical depth depending on latitude. The formulas for calculation of total amount of precipitable water during GPS measurements in condition of low clouds prevalence in dependence of latitude are given.

Keywords: total amount of precipitable water, wet delay, clouds, GPS measurements, atmosphere, optical depth.

 

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1.            Macpherson S., Deblonde G., Aparicio J., Casati B. Impact of ground-based observations on the Canadian regional analysis and forecast system. Environment Canada, Dorval, QC, Canada.

http://www.

2.            Haase J., Ge M., Vedel H., Calais E. Accuracy and variability of GPS tropospheric delay measurements of water vapor in the Western Mediterranean. 2002, Bull. At. Meteor. Soc.

http://www.

3.            Boccolari M., Fazlagic S., Santangelo R. GPS coordinate estimates by a priori tropospheric delays from NWP using ultra-rapid orbits //Annals of geophysics, 2006, Vol. 49, No. 4/5, pp. 881-889.

4.            Tselioudis G., DelGenio A.D., Je W.K., Yao M.-S. Temperature dependence of low optical thickness in the GISS GCM: contributing mechanisms and climate implications // Journal of Climate, 1998, Vol. 11, No. 12, pp. 3268-3281.