CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
Measurements > Ocean >
Multi-purpose imagery (ocean) >
Ocean imagery and water leaving spectral radiance


Measurement Definition*: A two-dimensional array of water leaving radiance values - Measuring units. W .m-2 . sr-1 .nm-1, Uncertainty units %

Thematic Links
InstrumentStatus/
Accuracy
Instrument DescriptionMeasurement TechnologyTimeline
ABI
Advanced Baseline Imager
Operational
Detects clouds, cloud properties, water vapour, land and sea surface temperatures, dust, aerosols, volcanic ash, fires, total ozone, snow and ice cover, vegetation index.n/a
AGRI
Advanced Geosynchronous Radiation Imager
Operational
A multiple channel radiation imager, one of the primary instruments aboard FY-4. Technically featured by a precisely designed two-mirror structure, capable of accurate and flexible sensing in two dimensions, and minute-level fast sector scanning. Frequent Earth imaging over 14 bands with off-axis three reflections of the primary optic system. On-board black body available for IR calibrations at very short time intervals.n/a
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.n/a
C-Band SAR
C-Band Synthetic Aperture Radar
Operational
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
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
HSI-2 (HJ-2A)
Hyper Spectrum Imager 2
Operational
Hyperspectral measurements for environment and disaster management operations.n/a
Imager
Imager
Operational
Measures cloud cover, atmospheric radiance, winds, atmospheric stability, rainfall estimates. Used to provide severe storm warnings/ monitoring day and night (type, amount, storm features).n/a
MBEI
Multi-Band Earth Imager
Operational
Multispectral scanner images of land surface.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
MSU-MR
Low-resolution multispectral scanning imager-radiometer
Operational
Parameters of clouds, snow, ice and land cover, vegetation, surface temperature, fire detection.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
PALSAR-2
Phased Array type L-band Synthetic Aperture Radar-2
Operational
Disaster monitoring, land monitoring, agricultural monitoring, natural resource exploration, global forest monitoring, potential use and interferometry.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
SAR-L
L-Band Synthetic Aperture Radar
Operational
Land, ocean, emergencies, soil moisture, interferometry, others.n/a
SGLI
Second-generation Global Imager
Operational
+/-30 %
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.n/a
VISSR-2
Stretched Visible and Infrared Spin Scan Radiometer-2
Operational
Meteorological.n/a
WSAR
WSAR
Operational
High resolution radar measurements of land and ocean features.n/a
X-Band SAR
X-Band Synthetic Aperture Radar
Operational
High resolution images for monitoring of land surface and coastal processes and for agricultural, geological and hydrological applications.n/a
GEOXO Imager
GEO Extended Operations Imager
Being developed
Detects clouds, cloud properties, water vapour, land and sea surface temperatures, dust, aerosols, volcanic ash, fires, total ozone, snow and ice cover, vegetation index.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 American/a
HSI
HyperSpectral Instrument
Being developed
Pushbroom-type grating Imaging Spectrometer with high Signal-to-noise Ratio and data uniformity to derive quantitative surface characteristics supporting the monitoring, implementation and improvement of a range of policies in the domain of raw materials, agriculture, soils, food security, biodiversity, environmental degradation and hazards, inland and coastal waters, snow, forestry and the urban environmentn/a
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 propertiesln/a
PALSAR-3
Phased Array type L-band Synthetic Aperture Radar-3
Being developed
Disaster monitoring, land monitoring, agricultural monitoring, natural resource exploration, global forest monitoring, potential use and interferometry.n/a
Advanced MSU-MR
Advanced Multispectral scanning imager-radiometer
Proposed
Parameters of clouds, snow, ice and land cover, vegetation, surface temperature, fire detection.n/a
HSC
High Sensitivity Camera
Proposed
Low light detection applicationsn/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
L-Band SAR
L-Band Synthetic Aperture Radar
Proposed
Global observation of dynamic processes in the bio-, cryo-, geo- and hydrosphere.n/a
HISUI
Hyperspectral Imager Suite
No longer considered
Global energy and resource related applications - Exploration of oil, gas, and metal resources - Environmental assessments of oil/gas fields and mines. Other applications such as environmental monitoring, agriculture, and forestry. Instrument was considered as a part of ALOS-3.n/a
* Description adapted from WMO.