Soil Moisture Mapping Using Sentinel-1A Synthetic Aperture Radar Data

Year 2018, Volume: 5 Issue: 2, 178 - 188, 01.08.2018

Aliihsan Şekertekin Aycan Murat Marangoz Saygın Abdikan

https://doi.org/10.30897/ijegeo.425606

Cited By: 23

Abstract

The aim of this study is to estimate and map soil
moisture distribution using C-band Synthetic Aperture Radar (SAR) data.
Sentinel-1A is a new generation C-band SAR satellite, and in this study
Sentinel-1A data acquired on 24 April 2016 were used to retrieve soil moisture
map. An agricultural region in Bergama, a district of İzmir city, was chosen as
the study area. In-situ soil moisture measurements were carried out in 20 test
fields simultaneously with SAR data acquisition. The effects of soil moisture
and local incidence angle on backscattering coefficient were analyzed, and then
a multiple regression analysis was performed to generate an empirical model.
The proposed model was evaluated using statistical metrics namely coefficient
of determination (R²) and Root Mean Square Error (RMSE), and the
results were 0.84 and 2.46 %, respectively. The obtained results showed that
Sentinel-1A SAR data presented satisfying outcomes to estimate and map soil
moisture content.

Keywords

Microwave Remote Sensing, Soil Moisture Mapping, Synthetic Aperture Radar, Sentinel-1

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