THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
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Gravity, Magnetic and Geodynamic measurements >
Geoid


Measurement Definition*: Equipotential surface which would coincide exactly with the mean ocean surface of the Earth, if the oceans were in equilibrium, at rest, and extended through the continents (such as with very narrow channels) - Physical unit: [ cm ] - Accuracy unit: [ cm ].
InstrumentStatus/
Accuracy
Instrument DescriptionMeasurement TechnologyTimeline
DORIS-NG
Doppler Orbitography and Radio-positioning Integrated by Satellite-NG
Operational
Precise orbit determination; Real time onboard orbit determination (navigation).n/a
POSEIDON-3B Altimeter
Positioning Ocean Solid Earth Ice Dynamics Orbiting Navigator (Single frequency solid state radar altimeter)
Operational
Nadir viewing sounding radar for provision of real-time high precision sea surface topography, ocean circulation and wave height data.Radar altimeter
SRAL
SAR Radar Altimeter
Operational
Marine and land services.Radar altimeter
Poseidon-4 Altimeter
Poseidon-4 SAR Radar Altimeter
Being developed
Nadir viewing sounding radar for provision of real-time high-precision sea surface topography, ocean circulation and wave height data.Radar altimeter
* Description adapted from WMO.
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