THE CEOS DATABASE : Missions, Instruments and Measurements
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Liquid water and precipitation rate


Water forms one of the most important constituents of the Earth’s atmosphere and is essential for human existence. The global water cycle is at the heart of the Earth’s climate system, and better predictions of its behaviour are needed for monitoring climate variability and change, weather forecasting and sustainable development of the world’s water resources.
Detailed MeasurementDescription*InstrumentsTimeline
Lake area-1 instrument
Lake Surface Height-1 instrument
Precipitation index (daily cumulative)Cumulative precipitation over a 24-hour period.4 instruments
Precipitation rate (liquid) at the surfaceRate of precipitation reaching the ground - Physical unit: [ mm/h ] (if solid, mm of liquid water after melting) - Accuracy unit: [ mm/h ].42 instruments
Precipitation rate (solid) at the surfaceRate of precipitation reaching the ground - Physical unit: [ mm/h ] (if solid, mm of liquid water after melting) - Accuracy unit: [ mm/h ].5 instruments
* Description adapted from WMO.
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