Satellites and Spacecraft Experimental Geodetic Satellite "AJISAI" (EGS)

In Operation

Project Topics

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Aug. 12, 2016 Updated

AJISAI marked 30th anniversary on Aug. 13, 2016, and its operation still continues

AJISAI marked 30th anniversary on Aug. 13, 2016, and its operation still continues

The Experimental Geodetic Satellite "AJISAI" (EGS)" was launched at 5:45 a.m. on Aug 13, 1986 (JST) from the Tanegashima Space Center and it was put into a circular orbit at an altitude of 1,500 km by the maiden H-I Launch Vehicle. AJISAI is the first Japanese geometric satellite, and its major missions are rectifying Japan's domestic geodetic triangular net -- determining the exact position of many isolated Japanese islands and establishing Japan's geodetic point of origin. AJISAI is a ball-...

About Experimental Geodetic Satellite "AJISAI" (EGS)

To establish Japan’s geodetic origin through accurate land surveying from space.

The primary short-range objective for AJISAI (EGS) was testing of NASDA's H-I'(2-stage) launch vehicle. Long-range applications included a survey aimed at rectifying Japan's domestic geodetic triangular net - determining the exact position of many isolated Japanese islands and establishing Japan's geodetic point of origin.
The survey is conducted by the Geospatial Information Authority of Japan and Hydrographic Department, Japan Coast Guard.

Lauch date: August 13, 1986

Characteristics of Experimental Geodetic Satellite "AJISAI" (EGS)

Major Characteristics

International Designation Code 1986-061A
Launch Date 05:45, August 13, 1986 (JST)
Launch Vehicle H-I Launch Vehicle No.1(H15F)
Location Tanegashima Space Center
Shape 215cm(D) sphere with solar ray and laser beam reflectors.
Weight Approx. 685kg
Orbiter circular
Altitude Approx. 1500km
Inclination Approx. 50 deg
Period Approx. 116 minutes
Attitude Control Spin-stabilization

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