NAVIGATION ANALYSIS FOR THE PRIMARY SCIENCE ORBITS OF PARKER SOLAR PROBE

Navigation analysis is presented regarding how to best achieve the three primary science orbits for the Parker Solar Probe mission upon completion of the final Venus flyby. It is shown that expected delivery to Venus ensures the primary science requirement is met without additional correction maneuvers and with margin. A linear covariance study and a nonlinear Monte Carlo study are used to verify this result as well as to determine how poor the final Venus delivery would need to be to threaten the prime science requirement. Potential fuel costs of enacting the pre-launch plan of targeting back to a reference perihelion radius at each solar encounter are quantified. Finally, the actual delivery to Venus and the resulting post-flyby trajectory is presented.

本文开展导航分析，围绕帕克太阳探测器（Parker Solar Probe）任务在完成最终金星飞掠后，如何最优达成三项核心科学轨道的实现路径展开研究。研究表明，预期的金星递送状态可在无需额外轨道修正机动且留有裕度的前提下，满足核心科学任务要求。本研究采用线性协方差分析与非线性蒙特卡洛分析两种方法，对上述结论进行验证，并明确了最终金星递送状态需恶化至何种程度才会危及核心科学任务要求。此外，本文量化了执行发射前规划方案的潜在燃料开销——该方案要求在每次太阳交会时将轨道目标重置至参考近日点半径。最后，本文给出了实际的金星递送状态以及飞掠后所产生的后续轨道轨迹。