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


Measurement Definition*: Deviation of sea level from the geoid caused by ocean currents (that is after corrections for tides and atmospheric pressure effects) - Physical unit: [ cm ] - Accuracy unit: [ cm ].

Thematic Links
InstrumentStatus/
Accuracy
Instrument DescriptionMeasurement TechnologyTimeline
ALT
Radar Altimeter
Operational
Global ocean topography, sea level and gravity field measurements.Radar altimeter
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
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
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.n/a
SAR (RCM)
Synthetic Aperture Radar (SAR) C band
Operational
All-weather, C-band data to support ecosystem monitoring, maritime surveillance and disaster management.n/a
SAR (RISAT)
Synthetic Aperature Radiometer (RISAT)
Operational
Radar backscatter measurements of land, water and ocean surfaces for applications in soil moisture, crop applications (under cloud cover), terrain mapping, etc.n/a
SRAL
SAR Radar Altimeter
Operational
Marine and land services.Radar altimeter
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.Radar altimeter
S-Band SAR
S-Band Synthetic Aperture Radar
No longer operational
Radar measurements for natural and disaster monitoring.n/a
* Description adapted from WMO.
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