On the anticipated utility of RCM CP data for freshwater ICE mapping and monitoring

The option to acquire compact polarimetry (CP) data will be available on all RADARSAT Constellation Mission (RCM) imaging modes. Relative to RADARSAT-2´s (R2) polarimetric data, RCM´s CP data can be acquired over wider swaths (up to 500 km) but offer reduced polarization diversity. In addition, the nominal signal-to-noise ratios (SNR) for RCM modes fall short of those for R2 polarimetric modes. This paper presents results of an ongoing study into the utility of RCM CP data in support of the mapping and monitoring of freshwater ice cover. Specifically, the effects of the loss in polarization diversity and radiometric resolution on the information content regarding freshwater ice cover properties and processes are assessed. The results indicate that RCM CP data will offer good potential in support of spring breakup monitoring and ice type mapping. On the other hand, RCM CP data are expected to be of limited utility for freeze-up monitoring.