(Preprint) AAS 09-137 A CUBED SPHERE GRAVITY MODEL FOR FAST ORBIT PROPAGATION
نویسندگان
چکیده
The cubed sphere model of the gravity field maps the primary body to the surface of a segmented cube, with a basis defined on the cube surface for interpolation purposes. As a result, the model decreases orbit propagation time and provides a localized gravity model. This paper provides a brief description of the cubed sphere model, which is currently derived from the spherical harmonics. Early tests of the integration constant did not meet requirements, thus the model was reconfigured to improve accuracy. A detailed characterization of the model was then performed to profile agreement with the base model. The new model closely approximates the spherical harmonics with orbits deviating by a fraction of a millimeter at or above feasible Earth-centered altitudes.
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