THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
Measurements > Ocean >
Ocean colour/biology >
Ocean chlorophyll concentration


Measurement Definition*: Indicator of living phytoplankton biomass, extracted from ocean colour observation - Uncertainty is expressed in mg/m3 for a given concentration of 1 mg/m3 - Measuring Units mg/m3, Uncertainty Units mg/m3

Thematic Links
InstrumentStatus/
Accuracy
Instrument DescriptionMeasurement TechnologyTimeline
Advanced GOCI
Advanced Geostationary Ocean Colour Imager
Operational
Ocean colour information, coastal zone monitoring, land resources monitoring.Multi-purpose imaging Vis/IR radiometer
CHRIS
Compact High Resolution Imaging Spectrometer
Operational
Supports a range of land, ocean and atmospheric applications, including agricultural science, forestry, environmental science, atmospheric science and oceanography.n/a
ETM+
Enhanced Thematic Mapper Plus
Operational
Measures surface radiance and emittance, land cover state, and change (e.g., vegetation type). Used as multi-purpose imagery for land applications.n/a
GSA (1)
Hyperspectral imaging equipment
Operational
Land surface monitoringn/a
HSI-2 (HJ-2A)
Hyper Spectrum Imager 2
Operational
Hyperspectral measurements for environment and disaster management operations.Multi-purpose imaging Vis/IR radiometer
MERSI
Medium Resolution Spectral Imager
Operational
Measurement of vegetation indexes and ocean colour.Multi-purpose imaging Vis/IR radiometer
MERSI-2
Improved Medium Resolution Spectral Imager
Operational
Measurement of vegetation indexes and ocean colour.Multi-purpose imaging Vis/IR radiometer
MERSI-3
Improved Medium Resolution Spectral Imager - 3
Operational
Measurement of vegetation indexes and ocean colour.Multi-purpose imaging Vis/IR radiometer
MERSI-LL
Medium Resolution Spectral Imager - Low-Light
Operational
Measurement of vegetation indexes and ocean colour.Multi-purpose imaging Vis/IR radiometer
MISR
Multi-angle Imaging SpectroRadiometer
Operational
Measurements of global surface albedo, aerosol and vegetation properties. Also provides multi-angle bidirectional data (1% angle-to-angle accuracy) for cloud cover and reflectances at the surface and aerosol opacities. Global and local modes.n/a
MODIS
MODerate-Resolution Imaging Spectroradiometer
Operational
Data on biological and physical processes on the surface of the Earth and in the lower atmosphere, and on global dynamics. Surface temperatures of land and ocean, chlorophyll fluorescence, land cover measurements, cloud cover (day and night).n/a
OCM (Oceansat-2)
Ocean Colour Monitor (Oceansat-2)
Operational
Ocean colour data, Estimation of phytoplankton concentration, identification of potential fishing zones, assessment of primary productivity.n/a
OLCI
Ocean and Land Colour Imager
Operational
Marine and land services.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
SGLI
Second-generation Global Imager
Operational
+/-100 %
Medium resolution multi-spectral imaging of land, ocean and atmosphere. SGLI-VNR is an optical sensor capable of multi-channel nadir observation at wavelengths from near-UV to NIR and forward or backward polarization observation at red and near infrared wavelengths (Push-broom scanning). SGLI-IRS is an optical sensor capable of multi-channel nadir observation at wavelengths from SWIR to TIR wavelengths (Cross-track scanning).n/a
VIIRS
Visible/Infrared Imager Radiometer Suite
Operational
Global observations of land, ocean, and atmosphere parameters: cloud/weather imagery, sea-surface temperature, ocean colour, land surface vegetation indices.Multi-purpose imaging Vis/IR radiometer
GLIMR Instrument
Geosynchronous Littoral Imaging and Monitoring Radiometer (GLIMR)
Being developed
GLIMR will make observations of rapidly evolving phytoplankton dynamics and hazards such as Harmful Algal Blooms (HABs) and oil spills in the Gulf of Mexico and other selected coastal regions of North and South AmericaMulti-purpose imaging Vis/IR radiometer
SSTM-1 (Oceansat-3)
Sea Surface Temperature Monitor-1
Being developed
TIR and OCM combination will support joint analysis for operational potential fishing zones.Multi-purpose imaging Vis/IR radiometer
VIS-NIR
Multi-spectral Optical Camera - Visible & Near Infrared
Approved
Ocean Colour - Open ocean, coastal & in-land waters.n/a
MERSI-S
Improved Medium Resolution Spectral Imager - Simplified
Proposed
Measurement of vegetation indexes and ocean colour.Multi-purpose imaging Vis/IR radiometer
OCM (Oceansat-3)
Ocean Colour Monitor (Oceansat-3)
Proposed
Ocean colour data, Estimation of phytoplankton concentration, identification of potential fishing zones, assessment of primary productivity.n/a
GOCI
Geostationary Ocean Colour Imager
No longer operational
Ocean colour information, coastal zone monitoring, land resources monitoring. Ceased operations from March 2021.Multi-purpose imaging Vis/IR radiometer
* Description adapted from WMO.
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