First spaceborne phase altimetry over sea ice using TechDemoSat‐1 GNSS‐R signals
carrier phase, Global Navigation Satellite System reflectometry, sea ice, altimetry, Sea surface, Navigation, Melting, Navigation satellites, Soil moisture, Spatial discrimination, Sea ice thickness, Altimeters, Ice cover, Ice-water interface, Salinity, Thickness, Soils, Global navigation satellite system, Satellites, Ice thickness, Satellite tracking, Signa...