Journal of Astronomy and Space Sciences

The Korean Space Science Society (한국우주과학회)
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GROUND TRACK ACQUISITION AND MAINTENANCE MANEUVER MODELING FOR LOW-EARTH ORBIT SATELLITE

  • Lee, Byoung-Sun (TT&C Section, Electronics and Telecommunications Research Institute) ;
  • Eun, Jong-Woo (T&C Section, Electronics and Telecommunications Research Institute) ;
  • Webb, Charles-E. (KDK Industries)
  • Published : 1997.12.01
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Abstract

This paper presents a comprehensive analytical approach for determining key maneuver parameters associated with the acquisition and maintenance of the ground track for a low-earth orbit. A livearized model relating changes in the drift rate of the ground track directly to changes in the orbital semi-major axis is also developed. The effect of terrestrial atmospheric drag on the semi-major axis is also explored, being quantified through an analytical expression for the decay rate as a function of density. The non-singular Lagrange planetary equations, further simplified for nearly circular orbits, provide the desired relationships between the corrective in-plane impulsive velocity increments and the corresponding effects on the orbit elements. The resulting solution strategy offers excellent insight into the dynamics affecting the timing, magnitude, and frequency of these maneuvers. Simulations are executed for the ground track acquisition and maintenance maneuver as a pre-flight planning and analysis.

Keywords

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