| Instrument | Status/
Accuracy | Instrument Description | Measurement Technology | Timeline |
| AltiKa | Operational | Sea surface height. | n/a |  |
| AMSR2 | Operational +/-1 m/s | Accuracy of the latest standard products (RMSE): Sea surface temperature: 0.5 degC, Sea ice concentration: 9%, Cloud liquid water: 0.04 kg/m2, Water vapour: 1.5 kg/m2 through total column, Sea surface wind speed 1.0 m/s, (Relative Error in %) Precipitation rate: 37 % for ocean & 62 % for land. (MAE) Snow depth: 18 cm, Soil Moisture Content: 4 %vol. See AMSR Data Catalog (https://www.eorc.jaxa.jp/AMSR/datacatalog/index_en.html) for more detail. | n/a | |
| AMSR3 | Operational +/-1.47 m/s | Measurements of water vapour, cloud liquid water, precipitation including snowfall, winds, sea surface temperature, sea ice concentration, snow cover, soil moisture. | n/a | |
| AMSU-A | Operational | All-weather night-day temperature sounding to an altitude of 45 km. | n/a | |
| AMSU-A | Operational | All-weather night-day temperature sounding to an altitude of 45 km. AMSU-A on Aqua is still partially operational, with 9 of the 15 channels working and collecting data. | n/a | |
| ASCAT | Operational | Measures wind speed and direction over ocean, soil moisture, sea ice cover, sea ice type, snow cover and snow parameters and vegetation parameters | n/a | |
| ATMS | Operational | Collects microwave radiance data that when combined with the CrIS data will permit calculation of atmospheric temperature and water vapour profiles. | n/a | |
| 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. | n/a | |
| COWVR | Operational | Hosted on the ISS, COWVR measures the direction and speed of winds at the ocean surface | n/a | |
| DDMI | Operational +/-2 m/s | Constellation of bistatic radar receivers using GPS satellite transmitters to detect ocean surface roughness and estimate near-surface wind speed from calm sea through hurricane force conditions and under all levels of precipitation. | n/a | |
| GMI | Operational | Measures rainfall rates over oceans and land, combined rainfall structure and surface rainfall rates with associated latent heating. Used to produce three hour, daily, and monthly total rainfall maps over oceans and land. | n/a | |
| GNSS-R | Operational | The core technology of GNSS-R is based on an indigenous space grade GPS receiver. One direct signal and eight reflected GNSS signals can be received and processed simultaneously in GNSS-R. In addition, the GNSS source is programmable. A nadir pointing antenna to measure surface reflection of GPS and GLONASS signals. | n/a | |
| Ka-band Radar Interferometer (KaRIn) | Operational | Swath mapping radar altimeter that provides measurements for surface water. | n/a | |
| MTVZA-GY | Operational | Atmospheric temperature and humidity profiles, precipitation, sea-level wind speed, snow/ice coverage. | n/a | |
| MWR (AWS) | Operational | Cross-track scanning microwave radiometer. Provides measurements of atmospheric humidity and temperature. | n/a | |
| MWRI | Operational | Ocean wind and temperature measurements. | n/a | |
| MWS | Operational | All-weather night-day temperature sounding | n/a | |
| PAZ SAR-X | Operational | High resolution X-band radar for security, land use, urban management, environmental monitoring, risk management. Spotlight, Scansar and Stripmap acquisition modes. | n/a | |
| POSEIDON-3B Altimeter | Operational | Nadir viewing sounding radar for provision of real-time high precision sea surface topography, ocean circulation and wave height data. | n/a | |
| POSEIDON-3C Altimeter | Operational | Nadir viewing sounding radar for provision of real-time high precision sea surface topography, ocean circulation and wave height data. | n/a | |
| Poseidon-4 Altimeter | Operational | Nadir viewing sounding radar for provision of real-time high-precision sea surface topography, ocean circulation and wave height data. | n/a | |
| 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. | n/a | |
| SAR (RCM) | Operational | All-weather, C-band data to support ecosystem monitoring, maritime surveillance and disaster management. | n/a | |
| SAR-L | Operational | Land, ocean, emergencies, soil moisture, interferometry, others. | n/a | |
| SCAT | Operational | Monitoring global sea surface winds. | n/a | |
| SGR-ReSI-Z | Operational +/-2 m/s | Ocean winds, waves, soil moisture, flooding, freeze / thaw state over permafrost, biomass, ice, snow | n/a | |
| SRAL | Operational | Marine and land services. | n/a | |
| MWI | Being developed | Measure cloud liquid water content, solid/liquid precipitation information, total column water vapour and temperature profiles, sea ice parameters, sea surface temperature, sea surface wind speed. | n/a | |
| MWR (EPS-Sterna) | Being developed | Cross-track scanning microwave radiometer. Provides measurements of atmospheric humidity and temperature. | n/a | |
| SCA | Being developed | Measures wind speed and direction over ocean, soil moisture, sea ice cover, sea ice type, snow cover and snow parameters and vegetation parameters | 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. | n/a | |
| 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. | n/a | |
| 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. | n/a | |
| MTVZA-GY-MP | Proposed | Atmospheric temperature and humidity profiles, precipitation, sea-level wind speed, snow/ice coverage. | n/a | |
| 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. | n/a | |
| AMSR-E | No longer operational +/-1.5 m/s | Measurements of water vapour, cloud liquid water, precipitation, winds, sea surface temperature, sea ice concentration, snow cover and soil moisture. Instrument stopped functioning 4th October 2011. | n/a | |