Operational 500 m surface soil moisture product using EOS-04 C-band SAR over Indian agricultural croplands

作者：Dharmendra Kumar Pandey, Prashant K. Srivastava, Rucha Dave, Raj Setia, Ompal, Rajiv Sinha, M. Sekhar, Manish Parmar, Shubham Gupta, Deepak Putrevu, Raghav Mehra, V. M. Ramanujam, Bimal K. Bhattacharya, Raj Kumar · 发表于：Current Science · 年份：2024 · DOI：10.18520/cs/v126/i9/1061-1068 · 被引用次数：5 · 研究领域：Soil Moisture and Remote Sensing、Synthetic Aperture Radar (SAR) Applications and Techniques

Surface soil moisture (SSM) at high spatial resolution is an essential land parameter for agricultural applications like irrigation mapping, scheduling, crop water stress assessment, etc.However, available satellite derived soil moisture products are inadequate for meeting the requirements of agricultural applications due to coarse scale soil moisture (~10-40 km).In this article, we developed an operational framework for first of its kind sub-km (~500 m) operational soil moisture product over India by utilizing ISRO's EOS-04 C-band synthetic aperture radar (SAR) data based on active-passive approach.The potential of EOS-04 SAR for sub-km scale is demonstrated and tested over major cropland sites covering highly heterogeneous and dynamic crop conditions in different agro-climatic regions over India which shows a good agreement with in situ datasets with mean ubRMSE, ranging from 0.051 to 0.078 m 3 /m 3 .