JPL行星历表的比较及评估

Comparisons and Evaluations of JPL Ephemerides

鉴于美国宇航局(NASA)喷气推进实验室(JPL)研发的一系列行星历表在深空导航、行星际探测等各个方面的广泛应用,有必要就其内容、适用范围、实现和维护进行比较.针对我国未来有望开展的金/火星深空探测任务,以DE405、DE421以及DE423为例,分析了动力学模型及其所采用的观测数据的不同.通过评估上述不同版本历表的精度和性能,着重讨论了不同历表对环金/火星探测器的影响并给出使用上的建议:对于金星探测任务而言,建议使用DE423;对于火星探测任务而言,建议使用DE421或DE423.

Since NASA＇s JPL （Jet Propulsion Laboratory） Ephemerides are widely used in deep space navigation and planetary exploration, it is necessary to compare their details, including the coverage, realization and maintenance. Focusing on Chinese Venus and Mars missions in the future, we take DE405, DE421, and DE423 as samples to analyze their dynamical models and observation data. By evaluating their accuracies and performances, we investigate their effects on an orbiter around Venus and Mars, and recommend that it is better to use DE423 for Venus missions and DE421/DE423 for Mars missions.