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The ADvanced Earth Observing Satellite (ADEOS) was developed by the National Space Development Agency (NASDA) of Japan to establish platform technology for Earth Observing System (EOS) spacecraft and ... inter-orbit communication technology for the transmission of Earth observation data. In addition, ADEOS contributed global observations of environmental change to the international community during the pre-EOS era. ADEOS was placed in a sun-synchronous, morning equator-crossing, polar orbiting spacecraft on August 17, 1996. ADEOS had a modular type shape with a deployable one wing solar paddle. The body measured 4 by 4 by 5 meters and the solar paddle was 3 by 13 meters in size. ADEOS was three-axis stabilized by a zero momentum strap-down attitude-control system. Attitude was maintained by four reaction wheels, two magnetometers, an inertial reference unit, and two hydrazine thrusters. Power was provided by a single gallium arsenide flexible solar paddle and five 35 Ahr NiCd batteries. Data was transmitted via direct transmission and inter-orbit communication through ETS-6. A Mission Data Recorder system onboard ADEOS stored high data rate and low data rate data on separate tape recorders.
Eight experiments on ADEOS included:
(1) Ocean Color and Temperature Scanner (OCTS), a NASDA core instrument
(2) Advanced Visible and Near-Infrared Radiometer (AVNIR), a NASDA
(3) NASA Scatterometer (NSCAT), a NASA/MTPE-provided instrument
(4) Total Ozone Mapping Spectrometer (TOMS), a NASA/MTPE provided
(5) Polarization and Directionality of the Earth's Reflectances
(POLDER), provided by CNES of France
(6) Interferometric Monitor for Greenhouse Gases (IMG), provided by
MITI of Japan
(7) Improved Limb Atmospheric Spectrometer (ILAS), provided by
Environmental Agency of Japan
(8) Retroreflector in Space (RIS), provided by the Environmental
Agency of Japan.
The design lifetime for this mission was expected to be three years. Subsequent flights of ADEOS are planned during the EOS-era. Signals from ADEOS were lost on June 30, 1997 and no futher contact with ADEOS has been made.
More information about ADEOS can be obtained at:
Japan Aerospace Exploration Agency