Moisturecontent of the troposphere in the Baikal region on data of GPS measurements

 

M. G. Dembelov¹, Yu. B. Bashkuev¹, A. V. Loukhnev², O.F. Loukhneva², V. A. Sankov²

¹Institute of physical material sciences of SB of RAS

²Institute of the Earth’s crust of SB of RAS

 

 The paper is received on January 11, 2016, after correction - on March 2, 2016

 

Abstract: Delay of GPS signals that propagate through the lower neutral atmosphere causes of errors in the accuracy of GPS positioning. This delay can be reduced to the zenith direction and called as a tropospheric delay. The continuously operating GPS network of 8 permanent observation points was created in the Baikal region. The results of primary processing GPS data provide continuous atmospheric data as a total zenith tropospheric delay (ZTD). Total zenith tropospheric delay is the sum of the "dry" or hydrostatic (ZHD) and "wet» (ZWD) components. Hydrostatic delay well be modeled by surface barometric measurements in the point of signal reception. "Wet" delay mainly depends on the quantity of atmospheric water vapor content in the troposphere. ZWD data allow revealing the amount of integral water vapor (IWV) and the amount of precipitated water (PW) over a measurement point.

Key words: GPS, total zenith tropospheric delay, integrated water vapor, precipitated water, meteorological data.