|Instrument: GLI : Global Imager|
Earth Remote Sensing Instruments
Instrument Class: Passive Remote Sensing
Instrument Type: Spectrometers/Radiometers
Instrument Subtype: Imaging Spectrometers/Radiometers
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The Global Imager, or GLI, is one of the Japan Aerospace Exploration Agency
(JAXA) mission instruments on board ADEOS-II which was launched by H-IIA rocket
on December 14, 2002. ADEOS-II failed on October 24, 2003.
GLI is an optical sensor while will observe globally and frequently
the reflected solar radiation from the Earth's surface including land,
ocean and clouds. It also has an infrared radiation capability to
measure the physical parameters such as chlorophyll, dissolved organic
matter, surface temperature, vegetation distribution, vegetation
biomass, distribution of snow and ice, and albedo of snow and
ice. These data may be used for determining the global circulation of
carbon; monitoring clouds, snow, ice and sea surface temperature; and
investigating the primary marine production.
The GLI will be equiped with 36 spectral channels from visible to infrared
wavelengths. The most striking feature of this sensor is summarized below:
- The GLI has many more visible channels, especially for the ocean
color observations, than other spaceborne sounders or imagers.
- Its dynamic range is wide enough to observe land area
- It employs 0.38, 0.76, and 1.38 ?m bands that were previously not
well utilized for spaceborne remotesensing.
- The tilt function enables it to avoid sea reflected sun glitter over
middle latitude areas
- It has six 250m resolution channels justified to
LANDSAT/Thematic Mapper (TM).
- Many atmospheric window bands (1.6, 2.2, 3.7, 8.6, 10.9, and 12.0
?m) are available.
- Water absorption bands (6.7, 7.3, and 7.5 ?m) are provided to obtain
vertical profiles of water vapor.
Additional information available at