Simplification of geopotential perturbing force acting on a satellite

• Autorzy: Eshagh M. , Abdollahzadeh M. , Najafi-Alamdari M.

Identyfikatory

DOI

10.2478/v10018-009-0006-7

• Języki publikacji: EN

Abstrakty

EN

One of the aspects of geopotential models is orbit integration of satellites. The geopotential acceleration has the largest influence on a satellite with respect to the other perturbing forces. The equation of motion of satellites is a secondorder vector differential equation. These equations are further simplified and developed in this study based on the geopotential force. This new expression is much simpler than the traditional one as it does not derivatives of the associated Legendre functions and the transformations are included in the equations. The maximum degree and order of the geopotential harmonic expansion must be selected prior to the orbit integration purposes. The values of the maximum degree and order of these coefficients depend directly on the satellite’s altitude. In this article, behaviour of orbital elements of recent geopotential satellites, such as CHAMP, GRACE and GOCE is considered with respect to the different degree and order of geopotential coefficients. In this case, the maximum degree 116, 109 and 175 were derived for the Earth gravitational field in short arc orbit integration of the CHAMP, GRACE and GOCE, respectively considering millimeter level in perturbations.

Słowa kluczowe

EN

geopotential; orbit integration; average power acceleration; orbital elements

• Wydawca: Centrum Badań Kosmicznych PAN ; De Gruyter
• Czasopismo: Artificial Satellites : Journal of Planetary Geodesy
• Rocznik: 2008
• Tom: Vol. 43, No. 2
• Strony: 45--64
• Opis fizyczny: Bibliogr. 33 poz., tab., wykr.

Twórcy

autor

Eshagh M.

• Royal Institute of Technology, Division of Geodesy, Stockholm, Sweden

autor

Abdollahzadeh M.

• K.N.Toosi University of Technology, Dept. of Geodesy and Geomatics, Tehran, Iran

autor

Najafi-Alamdari M.

• K.N.Toosi University of Technology, Dept. of Geodesy and Geomatics, Tehran, Iran

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).