| CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
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Measurements > Ocean >
Ocean topography/currents >
Bathymetry
  | Measurement Definition*: The measurement of water depth. [Unit of measurement - m] |
| Instrument | Status/
Accuracy | Instrument Description | Measurement Technology | Timeline |
C-Band SAR
C-Band Synthetic Aperture Radar | Operational
+/-3 cm | 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 |  |
OLI
Operational Land Imager | Operational
| Measures surface radiance, land cover state, and change (e.g., vegetation type). Used as multi-purpose imagery for land applications. | n/a | |
OLI-2
Operational Land Imager 2 | Operational
| Measures surface radiance, land cover state, and change (e.g., vegetation type). Used as multi-purpose imagery for land applications. | 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 | |
CAR
High Resolution Camera | Approved
| Panchromatic and multispectral (Vis/IR) measurements with high spatial resolution, with stereo capability for DEM generation. Applications in emergencies in general, agriculture, land use/land cover, change detection, urban environment, cartography, topography. | n/a | |
LandIS
Landsat Next Instrument Suite | Proposed
| Measures surface radiance, land cover state and change (e.g., vegetation type), and longwave termal infrared surface emittance. Used as multi-purpose imagery for land applications. | n/a | |
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* Description adapted from WMO.
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