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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2017, Vol. 14, No. 5, pp. 135-148

Sentinel 1 data correlation with ground measurements of soil temperature

N.V. Rodionova 1 
1 V.A. Kotelnikov FIRE RAS, Fryazino, Russia
Accepted: 21.06.2017
DOI: 10.21046/2070-7401-2017-14-5-135-148
The goal of this study is to analyze interactions between Sentinel 1 radar images and soil temperature resulting from in situ field data. Ground-based measurements of temperature and soil moisture for five stations in Finland, Poland and France during 2014–2016 are available on the website of the International soil moisture network. The ground stations are located at latitudes from 43° N to 67° N, and soils differ from soils of boreal forests (Finland) to the marshy peat soils in Poland, and grass and agricultural crops soils in France. Results indicated the positive correlation between backscatter coefficient and soil temperature for four stations (excluding Poland station). It was shown that Spearman correlation coefficient for VV polarization exceeds correlation coefficient for VH polarization. The regression relationships between the backscatter coefficient and soil temperature was constructed in the case of high correlation. The influence of vegetation and mechanical soil composition on the correlation coefficient was examined.
Keywords: remote sensing, C-band radar data, polarization, soil temperature, backscattering coefficient, Spearman’s correlation coefficient
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