THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
Measurements > Land >
Albedo and reflectance >
Fractionally absorbed PAR (FPAR)


Measurement Definition*: Fraction of PAR absorbed by vegetation (land or marine) for photosynthesis processes (generally around the “red”) - Physical unit: [ % ] - Accuracy unit: [ % ].
InstrumentStatus/
Accuracy
Instrument DescriptionMeasurement TechnologyTimeline
AVHRR/3
Advanced Very High Resolution Radiometer/3
Operational
Measurements of land and sea surface temperature, cloud cover, snow and ice cover, soil moisture and vegetation indices. Data also used for volcanic eruption monitoring.Multi-purpose imaging Vis/IR radiometer
AWiFS
Advanced Wide Field Sensor
Operational
Vegetation and crop monitoring, resource assessment (regional scale), forest mapping, land cover/ land use mapping, and change detection.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.High resolution optical imager
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.High resolution optical imager
HSI (HJ-1A)
Hyper Spectrum Imager
Operational
Hyperspectral measurements for environment and disaster management operations.Multi-purpose imaging Vis/IR radiometer
LISS-III (Resourcesat)
Linear Imaging Self Scanner - III (Resourcesat)
Operational
Data used for vegetation type assessment, resource assessment, crop stress detection, crop production forecasting, forestry, land use and land cover change.High resolution optical imager
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
MSI (Sentinel-2)
Multi-Spectral Instrument (Sentinel-2)
Operational
Optical high spatial resolution imagery over land and coastal areas for GMES operational services.High resolution optical imager
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.High resolution optical imager
SGLI
Second-generation Global Imager
Operational
+/-0
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
Vegetation
Vegetation
Operational
Global coverage every two days for uses including climate impact assessments, surface water resource management, agricultural monitoring, and food security estimates.n/a
VSC
Venus Superspectral Camera
Operational
High resolution superspectral images (12 spectral bands) for vegetation and landcover applications.High resolution optical imager
3MI
Multi-Viewing Multi-Channel Multi-Polarisation Imaging
Being developed
Measure aerosol parameters, air quality index, surface albedo, cloud informationn/a
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.High resolution optical imager
* Description adapted from WMO.
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