Validation of GNSS data about the integrated water vapor in Europe using sun photometers

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Abstract

In the article the comparison of time series of integrated water vapor (IWV) for 2015-2017 at 8 pair stations of GNSS and solar photometers of AERONET network in Europe is carried out. The distance between pairs of stations didn’t exceed 20 km. It is shown that bias and standard deviations of divergences have the seasonal course. In the winter GNSS-photometer bias was from –0.61 to 0.34 mm. In the summer the GNSS overestimates IWV relative to photometers by values from 0.52 to 2.26 mm. The standard deviation is maximal in summer and is from 1.31 to 1.64 mm, in winter it decreases to 0.49-0.86 mm that is 5-6% of IWV.

About the authors

V. V. Kalinnikov

Kazan (Volga Region) Federal University

Author for correspondence.
Email: Vlad-kalinnikov@mail.ru
Russian Federation, Kremlevskaya St., 18, Kazan, 420008

O. G. Khutorova

Kazan (Volga Region) Federal University

Email: Vlad-kalinnikov@mail.ru
Russian Federation, Kremlevskaya St., 18, Kazan, 420008

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