Very High Spatial Resolution Soil Moisture Observation of Heterogeneous Subarctic Catchment Using Nonlocal Averaging and Multitemporal SAR Data. - Terhikki Manninen; Emmihenna Jääskeläinen; Annalea Lohila; Mika Korkiakoski; Aleksi Räsänen; Tarmo Virtanen; Filip Muhic; Hannu Marttila; Pertti Ala-Aho; Mira Markovaara-Koivisto; Pauliina Liwata-Kenttälä; Raimo Sutinen; et al. (IEEE Trans. Geosci. Remote. Sens., 2022)