Determination orbit of synchronous satellite with short segmental arc
Abstract
Aerospace technology is developed with orbit tracking and measuring technology and orbit dynamics research. Researching and developing different orbit determination methods to suit the needs of different types of satellite orbit determination and meet the increasing demand for precision orbit has still been the main task in satellite application department. Mathematical models of satellite precision orbit determination have been used to determine the orbit of the satellite and achieved remarkable results. The synchronous satellite influenced by perturbation makes the actual track have some drift. The satellite also need regulate the orbit and posture in order to guarantee normal operation for mission. In order to study the track changes of the satellite in several hours and even in shorter time, a short segmental arc orbit determination method is applied. Pseudo-code expansion frequency high precision determination orbit data is applied and the short segmental arc orbits are determined with the dynamic method. First, the research results on synchronous satellite short segmental arc orbits determined with the dynamic method in duration of 1 hour's segmental arc and 15 minutes' segmental arc are presented and compared. The data are: the inner accordant accuracy of satellite location of X and Y is about 0.5m and Z is about 1.2 m solved with 1 hour's segmental arc, while the inner accordant accuracy of satellite location of X and Y is about 0.8 m and Z is about 1.8 m solved with 15 minutes' segmental arc. Second, the orbit determination with 15-minute segmental arc in changing tracks is focused. The goal is to provide the precise prediction track as soon as possible after the synchronous satellite maneuvers. Furthermore, the orbits determined with short segmental arc provide the bases for researching mechanic forces in the track and the changes of the satellite transponder delay and so on.
- Publication:
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Acta Astronomica Sinica
- Pub Date:
- April 2007
- Bibcode:
- 2007AcASn..48..248Y
- Keywords:
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- Celestial Mechanics: Determination of Orbit;
- Celestial Mechanics: Kinetics of Satellites