ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2014, Vol. 11, No. 4, pp. 230-243

Measuring soil moisture of agricultural fields using GLONASS and GPS data

V.L. Mironov1,2  , M.I. Mikhailov2 , K.V. Muzalevskiy2 , A.V. Sorokin1,2 
1 M.F. Reshetnev Siberian State Aerospace University, Krasnoyarsk 660037, Russia
2 L.V. Kirensky Institute of Physics, Siberian Branch RAS, Krasnoyarsk 660036, Russia
In this paper, we experimentally investigate the possibility to monitor soil moisture of agricultural fields based on measuring the interference diagrams formed by the signals of the GLONASS and GPS navigation satellites. The interference diagrams are recorded with a commercially available receiver MRC-32R, which is additionally equipped with an antenna of vertical polarization. The errors of soil moistures derived with this technique are estimated. Measurements of interference diagrams of the GLONASS and GPS navigation satellites were conducted in the case of a bare agricultural field located in a suburb zone of the city of Krasnoyarsk in the preplant period from April 14 to June 10, 2014. The retrieved soil moistures were found to best correlate with soil moistures measured in the surface layer with a thickness of 1,2 cm. The average error of measurement of soil moisture derived with the use of interference diagrams obtained for the signals of GLONASS and GPS are close to each other and do not exceed 0,04 cm3/cm3, with the soil moisture varying from 0,04 cm3/cm3 to 0,21 cm3/cm3. The error of the conducted measurements of soil moisture meets the minimum errors reported in the literature.
Keywords: interferometry, soil moisture, GLONASS, GPS
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