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


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2018, Vol. 15, No. 5, pp. 75-82

Possibilities of bistatic radiolocation of spatial variations of soil moisture and topography of soil surface based on GLONASS and GPS signals

K.V. Muzalevskiy 1 , M.I. Mikhailov 1 , V.L. Mironov 1 
1 L.V. Kirensky Institute of Physics SB RAS, Krasnoyarsk, Russia
Accepted: 01.08.2018
DOI: 10.21046/2070-7401-2018-15-5-75-82
In this paper, we propose a method for remote sensing of spatial variations in the topography and moisture of soil surface based on recording of interference of global navigation satellite systems (GNSS) signals GLONASS and GPS near the surface of soil. The proposed technique is based on the dependence of the instantaneous values of amplitude and phase of interference diagram of GNSS signals from soil moisture and local height of soil surface along the trajectory of footprint center as the GNSS satellite rises above the horizon. In the course of theoretical modeling, the possibility of retrieving spatial height and moisture profiles of soil surface from interference diagrams of GNSS signals recorded at a frequency of L1 (~1.6 GHz) is shown. The root-mean-square error between the retrieved and given values of spatial height and moisture profiles of the soil surface was not more than 0.3 cm and 0.006 cm3/cm3, respectively. The proposed technique was tested during experiment on field measurement from interference diagrams of GNSS signals recorded at an agricultural field in vicinity of Krasnoyarsk. The root-mean-square error and the correlation coefficient between the retrieved values of the relief heights relative to contact measured, appeared to be of 0.04 m and 0.87, respectively.
Keywords: global navigation satellite systems, GLONASS, GPS, reflectometry, soil moisture, topography
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