Outline of the ADEOS

Global change is a serious problem for humankind and may result in large-scale human disasters. Examples include global warming, ozone depletion, deforestation, desertification, droughts, and acid rain. Recent studies predict the temperature of the earth's surface will increase by several degrees, enough to affect most large cities of the world. Depletion of global ozone, like the polar ozone holes, could increase the incidence of cutaneous cancer. To understand and mitigate these problems, following investigations are necessary :

Recognition of the status of the global environment
Measurement and Monitoring of climatic parameters
Improvement of global climate models

The Advanced Earth Observing Satellite (ADEOS) is developed in order to make an international contribution to global supervision of environmental change on the earth, and also in order to develop platform technology for future satellites as well as inter-space communication technology for the transmission of earth observation data.
ADEOS therefore is equipped with two NASDA sensors and six AO sensors which collect global observation data on the earth's land, oceans, and atmosphere.

ADEOS Functional Parameters

Shape :Module type with deployable solar
paddle (one wing)
Size :Body Approx. 4 X 4 X 5 m
(mission, bus module)
Solar paddle Approx. 2.6 X 26 m
Weight :Approx. 3.5 ton (at lift-off)
Attitude control :Three-axis stabilized (Zero-momentum)
Design life :3 years

Orbit:: Type . . . . . Sun synchronous subrecurrent orbit; Altitude . . . . . . Approx. 800 km; Inclination . . . . . Approx. 98.6 deg; Period . . . . . . . Approx. 101 min.; Recurrent period . . . . . 41 days; Local time at descending node . . . . 10:15-10:45 a.m.

ADEOS Sensors (NASDA Sensors and AO Sensors)

Sensor	Country Organization	Measurement Objectives
AVNIR Advanced Visible and Near Infrared Radiometer	JAPAN NASDA	Land and coastal zone
OCTS Ocean Color and Temperature Scanner	JAPAN NASDA	Ocean color and sea surface temperature
NSCAT NASA Scatterometer	USA NASA/JPL	Measurement of surface wind speed and direction over the global oceans
TOMS Total Ozone Mapping Spectrometer	USA NASA/GSFC	Observation of total ozone changes, evaluation of changes in UV radiation and the observation of sulfer dioxide
POLDER Polarization and Directionality of the Earth's Reflectances	FRANCE CNES/LERTS	Observation of bidirectionality and polarization of the solar radiation reflected by the atmosphere
IMG Interferometric Monitor for Greenhouse Gases	JAPAN Ministry of International Trade and Industry	Observation of CO₂, CH₄, N₂O and other greenhouse gases
ILAS Improved Limb Atmospheric Spectrometer	JAPAN Environment Agency	Observation of the limb atmospheric micro-ingredient (Ozone, HNO₃, NO₂, CH₄, H₂O, aerosol, etc.) over high latitude area
RIS Retroreflector-In-Space	JAPAN Environment Agency	Measurement of ozone, fluorocarbon, CO, etc. by laser beam absorption technique, transmitted from ground station and reflected by the retroreflector on ADEOS.

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