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The Japanese Advanced Earth Observing Satellite (ADEOS) was developed 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 observation of environmental change to the international community during the pre-EOS era. NASA's Mission to Planet Earth (MTPE) program contributed two instruments for the ADEOS mission.

ADEOS was a sun-synchronous, morning equator-crossing (in descending node at about 10:30 a.m.), polar orbiting spacecraft. It had a modular type shape with a deployable one wing solar paddle. The body measured 4 x 4 x 5 m and the solar paddle was 3 x 13 m 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 A-hr NiCd batteries. Data was transmitted via direct transmission and inter-orbit communication through ETS-6. A Mission Data Recorder system on-board 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 core instrument; (3) NASA Scatterometer (NSCAT), a NASA/MTPE-provided instrument; (4) Total Ozone Mapping Spectrometer (TOMS), a NASA/MTPE provided instrument; (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; and, (8) Retroreflector in Space (RIS), provided by the Environmental Agency of Japan.

The design lifetime for this mission was three years, but the spacecraft ceased operating on 30 June 1997 for as yet unknown reasons. Subsequent flights of ADEOS are planned during the EOS era.

Alternate Names

  • Midori
  • Advanced Earth Observing Satellite
  • 24277

Facts in Brief

Launch Date: 1996-08-17
Launch Vehicle: H-2
Launch Site: Tanegashima, Japan
Mass: 3500.0 kg
Nominal Power: 5000.0 W

Funding Agency

  • National Space Development Agency (NASDA) (Japan)


  • Earth Science

Additional Information

Questions or comments about this spacecraft can be directed to: Coordinated Request and User Support Office.



NameRoleOriginal AffiliationE-mail
Mr. Donald L. MargoliesProject ManagerNASA Goddard Space Flight
Dr. Robert T. WatsonProgram ScientistNASA Headquarters 
Dr. George F. Esenwein, Jr.Program ManagerNASA Headquarters 
Dr. Firouz M. NaderiProject ManagerNASA Jet Propulsion
General ContactLaboratoire d'Etudes et de Recherches en Teledetection Spatiale 
Mr. T. TanakaProgram ManagerNational Space Development Agency of Japan 
Dr. Robert Douglas HudsonProject ScientistNASA Goddard Space Flight Center 
Dr. William C. PatzertProgram ScientistNASA
Mr. K. YoneyamaProject DirectorNational Space Development Agency of Japan 
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