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[A-3.2.2 Studies on Algorithms of Satellite Orbit Prediction for Laser Ranging Observation]

[Contact Person]

Masayuki Fujita
Japan Hydrographic Department
Maritime Safety Agency
5-3-1 Tsukiji, Chuo-ku, Tokyo 104, Japan
Tel:+81-3-3541-4387 Fax:+81-3541-4387
E-mail:mfuJi@cue.jhd.go.jp

[Total Budget for FY1995-FY1997]

8,093,000 Yen (FY1997;2,352,000 Yen)

[Abstract]

We performed satellite laser ranging observations to RIS on the ADEOS during the period from Oct.1996 to Jun.1997 at the Simosato Hydrographic Observatory. Acquired data were sent to the data center at Communications Research Laboratory every day for its orbit prediction. Tracking data for the ADEOS were also obtained at global SLR stations.

We constructed a Box-wing-shaped model of ADEOS for improving orbit prediction accuracy and performed orbit prediction experiments using global SLR data of ADEOS. As a result, it was shown that along-track estimation of empirical accerelation is preferable and that applications of center of mass correction and the shape model significantly improved the predicted result. It was also shown from the long period data analyses that the accuracy of the prediction in which our models are incorporated is several hundreds of meters after about a week in the along track component and that an oscillatory error with the period of once per revolution increases with time.

[Key Words]

ADEOS, SLR, orbit prediction, Box-wing model, center of mass correction