DYNAMIC MODEL DESIGN FOR AN ON BOARD MULTI-PURPOSE PRECISE ORBIT DETERMINATION SCHEME

This work provides a possible design methodology devoted to future development of a generalized on board Earth orbit navigation system. A multipurpose dynamic model architecture is exploited in order to perform trade-off and sensitivity analysis for orbit propagation force model and structural parameters identification against a target mission scenario. The dynamic model configuration is considered also within a sequential estimation process where external trajectory observations are available. The study introduces the possibility to preliminary assess the achievable performance of the navigation system by using the Cramer Rao Lower Bound in its parametric definition for dynamic estimators. The recursive approximation around the nominal mission path is considered by updating the Fisher Information Matrix. The developed design logic is finally applied on a representative orbit determination problem belonging to high orbit navigation scenarios.