THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
Measurements > Snow and Ice >
Snow cover, edge and depth >
Snow water equivalent


Measurement Definition*: Total-column water if snow is reduced to liquid. Linked to snow depth through assumptions or observation on density - Physical unit: [ mm ] - Accuracy unit: [ mm ].

Thematic Links
InstrumentStatus/
Accuracy
Instrument DescriptionMeasurement TechnologyTimeline
AMSR2
Advanced Microwave Scanning Radiometer -2
Operational
+/-16 cm
Measurements of water vapour, cloud liquid water, precipitation, winds, sea surface temperature, sea ice concentration, snow cover, soil moisture.Multi-purpose imaging MW radiometer
AMSU-A
Advanced Microwave Sounding Unit-A
Operational
All-weather night-day temperature sounding to an altitude of 45 km.n/a
AMSU-A
Advanced Microwave Sounding Unit-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
CSG SAR
COSMO-SkyMed di Seconda Generazione SAR
Operational
All-weather images of ocean, land and ice for monitoring of land surface processes, ice, environmental monitoring, risk management, environmental resources, maritime management, Earth topographic mapping.Imaging radar (SAR)
SAR (RADARSAT-2)
Synthetic Aperture Radar (SAR) C band
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)
Synthetic Aperture Radar (SAR) C band
Operational
All-weather, C-band data to support ecosystem monitoring, maritime surveillance and disaster management.Imaging radar (SAR)
SSM/I
Special Sensor Microwave Imager
Operational
Measures atmospheric, ocean and terrain microwave brightness temperatures to provide: sea surface winds, rain rates, cloud water, precipitation, soil moisture, ice edge, ice age.Multi-purpose imaging MW radiometer
SSM/IS
Special Sensor Microwave Imager Sounder
Operational
Measures thermal microwave radiation. Global measurements of air temp profile, humidity profile, ocean surface winds, rain overland/ocean, ice concentration/age, ice/snow edge, water vapour/clouds over ocean, snow water content, land surface temperature.Multi-purpose imaging MW radiometer
WindSat
WindSat
Operational
Demonstration of sea surface wind vector observation by polarimetric passive radiometryMulti-purpose imaging MW radiometer
AMSR3
Advanced Microwave Scanning Radiometer -3
Being developed
Measurements of water vapour, cloud liquid water, precipitation including snowfall, winds, sea surface temperature, sea ice concentration, snow cover, soil moisture.Multi-purpose imaging MW radiometer
AMSR-E
Advanced Microwave Scanning Radiometer-EOS
No longer operational
+/-20 %
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.Multi-purpose imaging MW radiometer
* Description adapted from WMO.
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