Beyond L-band: 0.4-2 GHz wideband radiometry for observing surface salinity in cold seawater - Jacqueline Boutin; Jean-Luc Vergely; Stéphane Ferron; Laurent Bertino; Giovanni Macelloni; Marco Brogioni; Emmanuel Dinnat; Lars Kaleschke; Rasmus Tonboe; Yiwen Zhou; Marie-Laure Frery; Valerie Dutto; et al. (Remote Sensing of Environment, 2026)