Semi-analytical long-term attitude propagation

Cavallari, Irene and Feng, Jinglang and Bi, Sifeng and Vasile, Massimiliano (2023) Semi-analytical long-term attitude propagation. In: 2023 AAS/AIAA Astrodynamics Specialist Conference, 2023-08-13 - 2023-08-17, Big Sky Resort.

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Abstract

A semi-analytical model is developed to study the long-term attitude motion of space objects, with different geometries and in different orbital regimes, under the effect of gravity, magnetic, light pressure, and aerodynamic torque. The problem is formulated in Sadov variables and a semi-analytical model is derived by averaging the equations of attitude motion over the fast Sadov angles and the orbital mean anomaly. A technique based on Lie transformations is used to compute an error estimate and improve the accuracy of the solution. We also propose a coordinate transformation that removes one of the singularities in the formulation in Sadov variables

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