Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2020. No. 6
ContentsFull text in Russian (pdf)
DOI https://doi.org/10.30898/1684-1719.2020.6.2
UDC 538.566
ABOUT THE POSSIBILITY OF SIMULATING ANGLE OF TROPOSPHERIC REFRACTION BY GPS MEASUREMENT DATA
M. G. Dembelov, Yu. B. Bashkuev
Institute of the Physical Materials Science of Siberian Branch of the Russian Academy of Sciences, Sakhyanovoy 6, Ulan-Ude, 670047, Russia
The paper was received on May 22, 2019
Abstract. Parameters of the refraction of radio waves over observation points in different latitudinal zones of Siberia (Irkutsk, Yakutsk, and Tiksi) are researched. The values of temperature and relative humidity at different altitude levels of atmospheric pressure were determined by data from meteorological radiosondes. The calculation of refraction angles is performed for a given altitude profile of the refractive index of air, which is modeled in an approximate exponential form. The refractive index profile also depends on the geographic location of the observation point, altitude and time of year. The calculated values of the total refraction angles for various visible zenith angles and the height of the source above the surface of the Earth are presented. The tropospheric delay is the delay of signal propagation in the troposphere, tropopause and lower part of the stratosphere. If the signal source is in the zenith direction, then the delay will be minimal, and this delay is called the zenith tropospheric delay (ZTD). ZTD is the sum of the “dry” or hydrostatic (ZHD) and “wet” (ZWD) components. The “dry” component of the tropospheric delay is calculated rather accurately from the surface values of atmospheric pressure. Taking into account the linear dependence of the values of the total refraction angle and the surface refractive index of air, the possibility of modeling the angles of tropospheric refraction based on GPS measurements is shown. The annual dependences of the angle of total refraction are calculated for a fixed value of the visible zenith angle and the height of the radiation source according to the GPS zenith total tropospheric delay without taking into account meteorological data.
Key words: refractive index, refraction angle, GPS measurements, tropospheric delay.
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For citation:
Dembelov M.G., Bashkuev Yu.B. About the possibility of simulating angles of tropospheric refraction by GPS measurement data. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2020. No. 6. Available at http://jre.cplire.ru/jre/jun20/2/text.pdf. DOI: https://doi.org/10.30898/1684-1719.2020.6.2