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Measurements
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CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
Measurements
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Ocean
>
Ocean colour/biology
>
Ocean suspended sediment concentration
Measurement Definition*: Parameter extracted from ocean colour observation. Indicative of river outflow, re-suspension or pollution of other-than-biological origin. Requested in both open ocean and coastal zone - Physical unit: [ g/m3 ] - Accuracy unit: [ % ] at a specific concentration (e.g., 2 g/m3).
Instrument
Status/
Accuracy
Instrument Description
Measurement Technology
Timeline
CZI
Coastal Zone Imager
Operational
Imagery of coastal regions - estuaries, tidal regions, etc.
Multi-purpose imaging Vis/IR radiometer
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-LL
Medium Resolution Spectral Imager - Low-Light
Operational
Measurement of vegetation indexes and ocean colour.
Multi-purpose imaging Vis/IR radiometer
MERSI-S
Improved Medium Resolution Spectral Imager - Simplified
Operational
Measurement of vegetation indexes and ocean colour.
Multi-purpose imaging Vis/IR radiometer
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
OLCI
Ocean and Land Colour Imager
Operational
Marine and land services.
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
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 America
Multi-purpose imaging Vis/IR radiometer
OCI
Ocean Color Instrument
Being developed
Ocean color slit-grating imaging spectrometer/radiometer for measuring top of atmosphere reflectance which is used to estimate ocean leaving light that contains information on biological components plus aerosol and cloud propertiesl
n/a
MERSI-3
Improved Medium Resolution Spectral Imager - 3
Approved
Measurement of vegetation indexes and ocean colour.
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
* Description adapted from WMO.