ESTIMATING SOIL MOISTURE USING OPTICAL AND RADARSATELLITE REMOTE SENSING DATA

摘要

The purpose of this work is to investigate the possible use of MODIS andENVISAT-ASAR Data to extract soil moisture (SM) field and validate thedeveloped systems by means of in situ measurements. The main idea of this study concerns the advantages that could arise from acontinuous and almost real time SM monitoring, permitted by wide-swath passiveoptical sensors that allow evaluating the dynamic evolution of different phenomenaon a wide range of application fields: from hydrological monitoring and managementto agricultural applications and so on. Observations provided by MODIS have nodirect physical relation with soil water content. On the other hand, the relationshipbetween Land Surface temperature (LST), NDVI and in situ measurements haveshown many potentialities to indirectly retrieve SM information.The use of SAR data for validation purposes is envisaged but not yet applied.Calibration and validation phases are performed over a test site where in situmeasurements are available.