Abstract

The SAR sensor on the Sentinel-1 satellite is an active sensor operating in the C band (from 4 to 8GHz) of the electromagnetic spectrum, unaffected by weather or day-nightconditions. The information obtained on the image, also known as thebackscatter value of the radar signal, is correlated with the soil moisturevalue. This paper presents the research results of soil moisture mapping fromSentinel-1 satellite image data. To calculate empirically for the establishmentof the appropriate function (regression) shows the mathematical relationshipbetween the actual measured soil moisture value and the values ​​extracted fromthe corresponding points on the backscatter image in VV polarization wasselected. In this study, the author has investigated the possibility of usingSentinel-1 images in combination with data of soil moisture measurement in thefield (at or near the time of the photos taken) to making soil moisture map onthe area of ​​Ben Tre province.