Yaw-Attitude Modelling for Eclipsing Satellites

OBJECTIVE

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• Properly relate measurements to the CoM of satellites (esp. Block II/IIA)
• Correct for the phase wind up effect
• Modelling solar pressure effects correctly

• What are ACs are using for the yaw-attitude model for GNSS orbits?
• What are the differences in ACs yaw-attitude models?

TOPICAL LINKS

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• Kouba, GPS Solutions 2009: A simplified yaw-attitude model for eclipsing GPS satellites
• Bar-Server, Journal of Geodesy 1996: A new model for GPS yaw attitude
• IGS Mail 591: New GPS attitude model
• IGS Mail 1653: Information regarding Block IIR modeling

COMPARISON DATA SET

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1. noon, and midnight (for Block IIR satellites only) turns
2. maximum yaw rate during a shadow crossing (BLOCK II/IIA only)
3. post shadow recovery to nominal yaw attitude (BLOCK II/IIA)