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Adeos 1

Advanced Earth Observing Satellite, also called Midori (means "green")


Designation 24277 / 96046A
Launch date 17 Aug 1996
Country of origin Japan
Operator NASDA
Mission Remote sensing
Perigee/Apogee 800/830 km
Inclination 98.6°
Period 101 min
Cycle 41 days
Launch vehicle H2 #4

To acquire global observation data corresponding to enviromental changes, such as global warming, depletion of the ozone layer, decrease of tropical rain forests, occurrence of unusual weather, etc. it will also help develop the platform bus interorbit data relay technologies necessary for next-generation Earth Observation Systems.

The satellite encountered several problems after launch: first a thruster problem which required to use the 20 N adjusters to reach final orbit; then on 24th September 1996 the satellite shutdown all nonessential systems. At the same time a scanning mirror used by the Interferomic Monitor for Greenhouse Gases became stuck on 20 September. Also, it was found that cosmic radiations affected the on-board computer. In late 1996 it was also found that the OCTS instrument has a mirror blocked.

Satelite cost: $474 million

External resources


sat-index articles

End of life

Out of service 30 Jun 1997
Cause electrical failure caused by the solar array paddle break itself caused by improper maneuver

Technical data


Prime contractor Mitsubishi
Mass at launch 3500 kg
Mass in orbit  
Dimension 4 x 4 x 5 m
Solar array 3 x 26 m
Stabilization 3-axis
DC power 4500 W
Design lifetime 3 years

Telemetry/data at: 2220, 8150, 8250, 8350 MHz perhaps also 467.7 MHz?
Ka-band inter orbit links to Comets


Ocean Color and Temperature Scanner (OCTS)
Advanced Visible and NearInfrared Radiometer (AVNIR)
NASA Scatterometer (NSCAT)
Total Ozone Mapping Spectrometer (TOMS)
Polarization and Directionality of the Earth's reflectances (POLDER)
Interferometric Monitor for Greenhouse Gases (IMG)
Improved Limb Atmospheric Spectrometer (ILAS)
Retroreflector in Space (RIS)

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