THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
Measurements > Ocean >
Ocean surface winds >
Wind vector over sea surface (horizontal)


Measurement Definition*: The wind vector represents the motion of the airmass over the ground. It is described by wind speed and the inverse of wind direction. Conventionally measured at 10 m height. For expected performances and in case the measurement is made at a different height or in case it is corrected to 10m, indicate in the comments the exact height of the instrument as well as whether correction to 10 m has been applied. Accuracy is the modulus of the vector difference between measured and true vectors. [Unit of measurement - m/s]
InstrumentStatus/
Accuracy
Instrument DescriptionMeasurement TechnologyTimeline
AGRI
Advanced Geosynchronous Radiation Imager
Operational
A multiple channel radiation imager, one of the primary instruments aboard FY-4. Technically featured by a precisely designed two-mirror structure, capable of accurate and flexible sensing in two dimensions, and minute-level fast sector scanning. Frequent Earth imaging over 14 bands with off-axis three reflections of the primary optic system. On-board black body available for IR calibrations at very short time intervals.n/a
C-Band SAR
C-Band Synthetic Aperture Radar
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
PALSAR-2
Phased Array type L-band Synthetic Aperture Radar-2
Operational
Disaster monitoring, land monitoring, agricultural monitoring, natural resource exploration, global forest monitoring, potential use and interferometry.n/a
SAR-L
L-Band Synthetic Aperture Radar
Operational
Land, ocean, emergencies, soil moisture, interferometry, others.n/a
SCAT
Wind SCATerometer
Operational
Ocean surface wind vectorRadar scatterometer
Scatterometer (Scatsat-1)
Scatterometer (Scatsat-1)
Operational
Ocean surface wind measurements.Radar scatterometer
WindRAD
Wind Radar
Operational
Measures sea-surface wind.Radar scatterometer
WindSat
WindSat
Operational
Demonstration of sea surface wind vector observation by polarimetric passive radiometryMulti-purpose imaging MW radiometer
PALSAR-3
Phased Array type L-band Synthetic Aperture Radar-3
Being developed
Disaster monitoring, land monitoring, agricultural monitoring, natural resource exploration, global forest monitoring, potential use and interferometry.n/a
SCA
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 parametersRadar scatterometer
Scatterometer (Oceansat-3)
Scatterometer (Oceansat-3)
Being developed
Ocean surface wind measurements, continuity to ocean vector windRadar scatterometer
Advanced Scatterometer
Advanced Scatterometer
Proposed
Ocean surface wind measurements.Radar scatterometer
Scatterometer (Oceansat-2)
Scatterometer (Oceansat-2)
No longer operational
Ocean surface wind measurements. Instrument failed in February 2014.Radar scatterometer
* Description adapted from WMO.
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