Effective Band Ratio of Landsat 8 Images Based on VNIR-SWIR Reflectance Spectra of Topsoils for Soil Moisture Mapping in a Tropical Region. - Dinh Ngo Thi; Nguyen Thi Thu Ha; Quy Tran Dang; Katsuaki Koike; Mai Trong Nhuan (Remote. Sens., 2019)