| CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
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Measurements > Snow and Ice >
Sea ice cover, edge and thickness >
Sea-ice Concentration
  | Measurement Definition*: The ocean area fraction of a cell covered by sea ice. |
| Instrument | Status/
Accuracy | Instrument Description | Measurement Technology | Timeline |
SGR-ReSI-CDHS
Space GNSS Receiver - Remote Sensing Instrument, CoreDHS avionics | Operational
| Ocean winds, waves, soil moisture, flooding, ice, snow. Similar to SGR-ReSI-Z, but with a smaller Zynq, and only supports 2 RF channels, only allowing collection of single frequency and single polarisation. | n/a |  |
Imaging Microwave Radiometer
Imaging Microwave Radiometer | Being developed
| A conical scanning total power radiometer operating in 5 bands (L/C/X/K/Ka) to provide high-spatial resolution microwave imaging radiometry measurements and derived products with continuous global coverage and sub-daily revisit in the polar regions and adjacent seas. | n/a | |
MWI
Microwave Imager | 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 | |
SGR-ReSI-Z
Space GNSS Receiver - Remote Sensing Instrument (Zynq based) | Being developed
| Ocean winds, waves, soil moisture, flooding, ice, snow | n/a | |
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* Description adapted from WMO.
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