THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
Measurements > Ocean >
Ocean topography/currents >
Sea level


Measurement Definition*: Actual, local sea level inclusive of mean sea level and perturbations (tides, etc.) [Unit of measurement - cm]

Thematic Links
InstrumentStatus/
Accuracy
Instrument DescriptionMeasurement TechnologyTimeline
ALT
Radar Altimeter
Operational
Global ocean topography, sea level and gravity field measurements.n/a
AltiKa
Ka-band Altimeter
Operational
Sea surface height.n/a
AMR
Advanced Microwave Radiometer
Operational
Altimeter data to correct for errors caused by water vapour and cloud-cover. Also measures total water vapour and brightness temperature.n/a
AMR-C
Advanced Microwave Radiometer for Climate
Operational
Capabilities of the AMR with the addition of an on-board calibrator for high stability wet-tropospheric path delay correction.n/a
DORIS-NG
Doppler Orbitography and Radio-positioning Integrated by Satellite-NG
Operational
Precise orbit determination; Real time onboard orbit determination (navigation).n/a
GPSP
Global Positioning System Payload
Operational
Precision orbit determination.n/a
LRA
Laser Retroreflector Array
Operational
Baseline tracking data for precision orbit determination and/or geodesy. Also for calibration of radar altimeter bias. Several types used on various missions. (ASI involved in LAGEOS 2 development).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.n/a
Poseidon-4 Altimeter
Poseidon-4 SAR Radar Altimeter
Operational
Nadir viewing sounding radar for provision of real-time high-precision sea surface topography, ocean circulation and wave height data.n/a
SRAL
SAR Radar Altimeter
Operational
Marine and land services.n/a
AMR-S
AMR-S Two-Beam Microwave Radiometer
Being developed
Capabilities of the AMR with the addition of a 2nd beam to provide wet-tropospheric path delay correction within both swaths of the primary radar instrument (KaRIn)n/a
Ka-band Radar INterferometer (KaRIN)
Ka-band Radar INterferometer (KaRIN)
Being developed
Swath mapping radar altimeter that provides measurements for surface water.n/a
POSEIDON-3C Altimeter
Positioning Ocean Solid Earth Ice Dynamics Orbiting Navigator (Single frequency solid state radar altimeter)
Approved
Nadir viewing sounding radar for provision of real-time high precision sea surface topography, ocean circulation and wave height data.n/a
* Description adapted from WMO.
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