Soil moisture estimation using Sentinel-1 SAR and field observation in the Eastern Ghats region of India - Uday Mandal; M. Madhu; Ramajayam Devarajan; Randhir Kumar; Gopal Kumar; HC Hombegowda; SK Samal; Saswat Kumar Kar; P. Raja; Pyla Sravani; Sitanshu Sekhar Patra (Environmental Monitoring and Assessment, 2026)