| Instrument | Status/
Accuracy | Instrument Description | Measurement Technology | Timeline |
| ALT | Operational | Global ocean topography, sea level and gravity field measurements. | Radar altimeter |  |
| AltiKa | Operational | Sea surface height. | Radar altimeter | |
| C-Band SAR | Operational | Marine core services, land monitoring and emergency services. Monitoring sea ice zones and arctic environment. Surveillance of marine environment, monitoring land surface motion risks, mapping of land surfaces (forest, water and soil, agriculture), mapping in support of humanitarian aid in crisis situations. | Imaging radar (SAR) | |
| Ka-band Radar Interferometer (KaRIn) | Operational | Swath mapping radar altimeter that provides measurements for surface water. | Radar altimeter | |
| POSEIDON-3B Altimeter | Operational | Nadir viewing sounding radar for provision of real-time high precision sea surface topography, ocean circulation and wave height data. | Radar altimeter | |
| POSEIDON-3C Altimeter | Operational | Nadir viewing sounding radar for provision of real-time high precision sea surface topography, ocean circulation and wave height data. | Radar altimeter | |
| Poseidon-4 Altimeter | Operational | Nadir viewing sounding radar for provision of real-time high-precision sea surface topography, ocean circulation and wave height data. | Radar altimeter | |
| SAR (RADARSAT-2) | Operational | All-weather images of ocean, ice and land surfaces. Used for monitoring of coastal zones, polar ice, sea ice, sea state, geological features, vegetation and land surface processes. | Imaging radar (SAR) | |
| SAR (RCM) | Operational | All-weather, C-band data to support ecosystem monitoring, maritime surveillance and disaster management. | Imaging radar (SAR) | |
| SGR-ReSI-Z | Operational | Ocean winds, waves, soil moisture, flooding, freeze / thaw state over permafrost, biomass, ice, snow | n/a | |
| SRAL | Operational | Marine and land services. | Radar altimeter | |
| SWIM | Operational | Ku-band Real-aperture radar (RAR) system, multi-incindence beams(0-10°) and azimuth scanning. Measurement of 2D ocean waves spectrum | n/a | |
| IRIS | Approved | Ku-band Interferometric Synthetic Aperture Radar Altimeter (with added Ka-band channel for snow depth retrieval and in combination with AMR-CR MW Radiometer for ice&snow classification and wet troposphere correction) to cover the needs for continuous monitoring of sea ice
thickness and land ice elevation measurement after Cryosat-2, with enhanced performance. | Radar altimeter | |
| L-Band SAR | Approved | L-band SAR instrument combining wide swath, high spatial resolution, high sensitivity, low ambiguity ratios, full polarimetric acquisition capability, and repeat-pass interferometry to support the retrieval of surface deformation over vegetated terrain, above-ground biomass density, soil moisture, land cover and land-cover change, flooded area information, ice sheet and glacier velocity, snow water, sea-ice conditions (type, concentration and motion), ocean winds and sea state conditions, as well as enhancing European maritime situational awareness. | Imaging radar (SAR) | |
| NG C-Band SAR | Approved | Marine core services, land monitoring and emergency services. Monitoring sea ice zones and arctic environment. Surveillance of marine environment, monitoring land surface motion risks, mapping of land surfaces (forest, water and soil, agriculture), mapping in support of humanitarian aid in crisis situations. | Imaging radar (SAR) | |
| SAOOH | Proposed | Interferometric swath altimeter building on the heritage of the SWOT mission. It will enhance sampling coverage and performance of hydrology water surface elevation measurements. | Radar altimeter | |