The present situation is characterised by existing Sentinel2, Sentinel3, Sentinel-5p (S5p), existing (SMOS) and planned (CO2M, FLEX, BIOMASS) ESA Earth Explorer missions, and further by MetOp (ASCAT)/Metop-NG as well as various third-party missions (AMSR-2, MODIS, PRISMA, EnMAP). The focus will be on L2-data from the different sources.

The interest for GNSS sensors is also motivated by next INPE’s satellite mission, Amazonia 1B/SabiaMar satellite (launch 2026 TBC), that will have a GNSS payload, with dual polarisation, dual frequency GNSS measurements, using a 2x2 antenna adapted from ESA’s HydroGNSS scout mission (it will be provided by SSTL)