Satellites and Spacecraft Ionosphere Sounding Satellite "UME" (ISS)

Operation Finished

About Ionosphere Sounding Satellite "UME" (ISS)

Japan's first Ionosphere sounding satellite was named Ume. It was used to monitor radio waves in the ionosphere and forecast conditions for optimal use of shortwave communications.
Ume-2 was put into orbit two years later - a power supply system failure caused Ume to malfunction one month after launching.
Ume-2 kept gathering obserration data even after its 1.5 year mission term. And it finished its operation on February 23,1983,because of deterioration of power generation.

Major Characteristics

UME
(ISS)
International Designation Code 1976-019A
Launch Date 2/29/1976
Launch Vehicle N-I Launch Vehicle (N2F)
Launch Site Tanegashima Space Center
Weight 139kg
UME-2
(ISS-b)
International Designation Code 1978-018A
Launch Date 2/16/1978
Launch Vehicle N-I Launch Vehicle (N4F)
Launch Site Tanegashima Space Center
Weight 141kg
Orbit Circular orbit/1000km(alt)circular/70 inclination/105 min. period
Dimensions Cylindrical, D:94cm
Attitude Control Spin-stabilized

Reference

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