On precise orbit determination of HY-2 with space geodetic techniques

• Autorzy: Guo J. , Kong Q. , Qin J. , Sun Y.
• Języki publikacji: EN

Abstrakty

EN

As the first radar altimetric satellite of China, HY-2 requires the precise orbit determination with a higher accuracy than that of other satellites. In order to achieve the designed radial orbit with the accuracy better than 10 cm for HY-2, the methods of precise orbit determination for HY-2 with the centimeter-level accuracy based on space geodetic techniques (DORIS, SLR, and satellite-borne GPS) are studied in this paper. Perturbations on HY-2 orbit are analyzed, in particular those due to the non-spherical gravitation of the earth, ocean tide, solid earth tide, solar and earth radiation, and atmospheric drag. Space geodetic data of HY-2 are simulated with the designed HY-2 orbit parameters based on the orbit dynamics theory to optimize the approaches and strategies of precise orbit determination of HY-2 with the dynamic and reduced-dynamic methods, respectively. Different methods based on different techniques are analyzed and compared. The experiment results show that the nonspherical perturbation modeled by GGM02C causes a maximum perturbation, and errors caused by the imperfect modeling of atmospheric drag have an increasing trend on T direction, but errors are relatively stable on the other two directions; besides, the methods with three space geodetic techniques achieve the radial orbit with the precision better than 10 cm.

Słowa kluczowe

EN

HY-2; precise orbit determination; DORIS; SLR; satellite-borne GPS; dynamic method; reduced-dynamic method

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2013
• Tom: Vol. 61, no. 3
• Strony: 752--772
• Opis fizyczny: Bibliogr. 33 poz.

Twórcy

autor

Guo J.

• College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao, China

autor

Kong Q.

• College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao, China

autor

Qin J.

• College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao, China

autor

Sun Y.

• College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao, China

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