FILTER STRATEGIES FOR MARS SCIENCE LABORATORY ORBIT DETERMINATION

摘要

The Mars Science Laboratory (MSL) spacecraft had ambitious navigation deliveryand knowledge accuracy requirements for landing inside Gale Crater.Confidence in the orbit determination (OD) solutions was increased by investigatingnumerous filter strategies for solving the orbit determination problem.We will discuss the strategy for the different types of variations: for example,data types, data weights, solar pressure model covariance, and estimating versusconsidering model parameters. This process generated a set of plausibleOD solutions that were compared to the baseline OD strategy. Even implausibleor unrealistic results were helpful in isolating sensitivities in the OD solutionsto certain model parameterizations or data types.