火星探测器行星际定轨两种数据处理方案比较

Comparison of Two Filter Strategies for Mars Probe Interplanetary Orbit Determination

计算了由于形状、姿态和表面性质不准确导致火星探测器行星际定轨存在较大光压模型误差时,两种不同定轨方案(方案1只估计光压系数,方案2同时估计光压系数和随机加速度)对光压模型误差的补偿效果。在方案2中建立了高斯马尔科夫模型表征光压模型导致的加速度误差,并选取了合适的随机模型参数。仿真分析表明方案2可以有效补偿光压模型误差,避免滤波发散,提高定轨精度。

Performance of two filter strategies（for filter strategy 1 SRP coefficients were taken as the only estimated parameters and for filter strategy 2 the estimated parameters included SRP coefficients and stochastic accelerations） were compared and analyzed for compensation on solar radiation pressure（SRP） model error due to inaccuracy of structure,attitude and material properties of the satellite vehicle.In filter strategy 2 the Gaussian-Markov process was modeled with proper parameters.Simulation showed that filter strategy 2 was able to provide good compensation for SRP model errors,avoid filter divergence and improve OD accuracy.