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Yaw attitude modeling for BeiDou I06 and BeiDou-3 satellites

Author:
Wang, Chen   Guo, Jing   Zhao, Qile   Liu, Jingnan   


Journal:
GPS Solutions


Issue Date:
2018


Abstract(summary):

The estimated yaw angles of the BeiDou I06 satellite demonstrated that the satellite experienced midnight- or noon-turn maneuvers when the sun elevation angle above the orbital plane ( angle) was in the range of [-3 degrees, +3 degrees] and the orbital angle was in the range of approximately [-6 degrees, 6 degrees] or [174 degrees, 186 degrees]. The behavior of yaw attitude maneuvers in the vicinity of the midnight and noon points was identical. An alternative yaw attitude model similar to that used for the Galileo Full-Operation-Capacity (FOC) satellites was developed on the basis of the estimated BeiDou I06 yaw angles with an accuracy of approximately 3.4 degrees to reproduce the yaw attitude behaviors. However, a discrepancy in the form of a reversal in yaw direction during the midnight-turn maneuver was observed for BeiDou I06 when the angle was extremely small (<0.1 degrees). The derived yaw attitude model was proved to model the yaw attitude of the BeiDou-3 experimental satellites, and reduces the observation residuals in the vicinity of the midnight and noon points to normal levels, and facilitates continuous satellite clock estimation during eclipse periods. Compared to the yaw attitude model developed by the European Space Operations Centre (ESOC), a similar performance has been achieved with maximum yaw differences up to 9.2 degrees when the angle is close to 0 degrees. The average agreement between the models is about 1 degrees. However, the ESOC model was developed based on a patented eclipsing model, the developed model in this study is open access.


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