ADEOS

## ADEOS (Advanced Earth Observing Satellite), Japan

ADEOS (also known as "Midori" in Japanese) is a remote sensing satellite operated by the National Space Development Agency of Japan (NASDA) for global observation of land, ocean and atmospheric processes. ADEOS was launched in August 1996, to be followed by ADEOS-II with a scheduled launch date in August 1999. ADEOS is expected to acquire data on worldwide environmental changes such as the greenhouse effect, ozone layer depletion, deforestation and abnormal climactic conditions.

## ADEOS Orbit

:

Type | Sun-Synchronous
Altitude | 797 km
Period | 101 min
Repeat Cycle | 41 days

Sensors

- OCTS (Ocean Colour and Temperature Sensor): OCTS is an optical radiometer developed by NASDA for global measurement of ocean colour and sea surface temperature. It has 8 bands in the visible and near-infrared region and 4 bands in the thermal region. OCTS data can be used for determination of the ocean primary production and carbon cycle and for getting information on ocean conditions for fishery and environmental monitoring.
- AVNIR (Advanced Visible and Near Infrared Radiometer): AVNIR developed by NASDA is a high spatial resolution optical sensor for observing land and coastal zones in the visible and near-infrared regions. It has 4 spectral bands with a 16 m spatial resolution and 1 panchromatic band with an 8 m spatial resolution.
- NSCAT (NASA Scatterometer): NSCAT is an active radar instrument developed by NASA's Jet Propulsion Laboratory (JPL), USA, for measurement of global wind speeds and directions over the ice-free oceans. It uses an array of antennas that radiate microwave pulses at Ku band (14 GHz frequency). Study using NSCAT data are expected to lead to improve methods of global weather forecasting and modeling.
- TOMS (Total Ozone Mapping Spectrometer): TOMS is developed by NASA's Goddard Space Flight Center (GSFC) for measurement of total ozone spatial distribution.
- POLDER (Polarization and Directionality of the Earth's Reflectances): POLDER is developed by the French Space Agency (CNES) for observation of the polarisation, directional and spectral characteristics of the solar light reflected by aerosols, clouds, oceans and land surfaces.
- IMG (Interferometric Monitor for Greenhouse Gases)
- ILAS (Improved Limb Atmospheric Spectrometer)
- RIS (Retroreflector in Space)

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