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


Measurement Definition*: Parameter extracted from ocean colour observation. Indicative of leaving phytoplankton biomass. Requested in both open ocean and coastal zone - Physical unit: [ mg/m3 ] - Accuracy unit: [ % ] at a specific concentration (e.g., 1 mg/m3).
InstrumentStatus/
Accuracy
Instrument DescriptionMeasurement TechnologyTimeline
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 (eg vegetation type). Used as multi-purpose imagery for land applications.n/a
GOCI
Geostationary Ocean Colour Imager
Operational
Ocean colour information, coastal zone monitoring, land resources monitoring.Multi-purpose imaging Vis/IR radiometer
GSA (1)
Hyperspectral imaging equipment
Operational
Land surface monitoringn/a
HSI (HJ-1A)
Hyper Spectrum Imager
Operational
Hyperspectral measurements for environment and disaster management operations.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
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 (eg 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
Advanced GOCI
Advanced Geostationary Ocean Colour Imager
Being developed
Ocean colour information, coastal zone monitoring, land resources monitoring.Multi-purpose imaging Vis/IR radiometer
OLI-2
Operational Land Imager-2
Being developed
Measures surface radiance, land cover state and change (e.g., vegetation type). Used as multi-purpose imagery for land applications.n/a
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
GSA (2)
Hyperspectral imaging equipment
Approved
Land surface monitoringn/a
VIS-NIR
Multi-spectral Optical Camera - Visible & Near Infrared
Approved
Ocean Colour - Open ocean, coastal & in-land waters.n/a
Event Imaging Spectrometer from GEO (GeoCape)
Event Imaging Spectrometer from GEO (GeoCape)
Proposed
Predictions of impacts from oil spills, fires, water pollution from sewage and other sources, fertilizer runoff, and other environmental threats. Detection and tracking of waterborne hazardous materials. Monitoring and improvement of coastal health.n/a
MERSI-S
Improved Medium Resolution Spectral Imager - Simplified
Proposed
Measurement of vegetation indexes and ocean colour.Multi-purpose imaging Vis/IR radiometer
Multi-band UV/VIS Spectrometer (ACE)
Multi-band UV/VIS Spectrometer (ACE)
Proposed
Ocean colour spectrometer for measuring ocean leaving light which contains information on biological components.n/a
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
Visible imaging spectrometer (HyspIRI)
Visible imaging spectrometer (HyspIRI)
Proposed
 n/a
MERSI
Medium Resolution Spectral Imager
No longer operational
Measurement of vegetation indexes and ocean colour. No longer operating due to lack of power.Multi-purpose imaging Vis/IR radiometer
* Description adapted from WMO.
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