| JPL行星历表的发展及比较 |
| |
| 引用本文： | 刘婉逸,邹贤才,衷路萍.JPL行星历表的发展及比较[J].大地测量与地球动力学,2022,42(9):925-930. |
| |
| 作者姓名： | 刘婉逸 邹贤才 衷路萍 |
| |
| 摘 要： | 基于DE405、DE421、DE430、DE440星历，计算各大行星在地球质心及太阳系质心惯性系中的位置，比较其他星历相对于DE440星历的行星位置精度。分析讨论各历表下月球的地心位置和速度精度，以及历表对于月球探测器的位置和速度从月心惯性系转为月固系的影响，并给出使用建议。结果表明，各大行星由于受观测数据等因素影响，位置精度差异较大，跨度从m级到106 m量级。对于行星的位置精度，DE421和DE430相对于DE405有1~2个量级的提高，DE430相对于DE421提高50%。DE405历表的月球地心位置、速度精度分别为7 m和0.02 mm/s，DE421历表分别为1.5 m和0.004 mm/s，DE430历表分别为1.3 m和0.003 5 mm/s。对于星历用于月球探测器从月惯系转为月固系产生的坐标和速度误差，DE405分别为30 m和3 cm/s，DE421分别为1.3 m和1.2 mm/s，DE430分别为1 m和0.9 mm/s。历表对于月球坐标系转换的影响为m级。对于月球探测器导航及相关任务，推荐使用DE430或DE440行星历表。
|
| 关 键 词： | 行星历表 月球探测 月固系 深空探测 精度 |
Development and Comparison of JPL Planetary Ephemerides |
| |
| LIU Wanyi,ZOU Xiancai,ZHONG Luping.Development and Comparison of JPL Planetary Ephemerides[J].Journal of Geodesy and Geodynamics,2022,42(9):925-930. |
| |
| Authors: | LIU Wanyi ZOU Xiancai ZHONG Luping |
| |
| Abstract: | Based on DE405, DE421, DE430 and DE440, we calculate the position of major planets under the geocentric celestial reference system(GCRS) and the barycentric celestial reference system(BCRS). We then compare the position accuracy of other ephemerides relative to DE440. We discuss the position and velocity accuracy of the Moon under GCRS based on different ephemerides, and analyze the effects on the conversion from lunar centered inertial system to the lunar fixed system and give some advice on application. The results show that due to observation data and other factors, the position accuracy of the major planets varies greatly, ranging from the metre level to the 106 m level. As for the position accuracy, DE421 and DE430 have an improvement of 1-2 orders of magnitude when compared to DE405, and DE430 improves 50% over DE421. The accuracy of lunar position and velocity relative to the center of Earth are 7 m and 0.02 mm/s for DE405, 1.5 m and 0.004 mm/s for DE421, 1.3 m and 0.003 5 mm/s for DE430. For the coordinate and velocity errors on the conversion from lunar centered inertial system to the lunar fixed system, the DE405 is 30 m and 3 cm/s, the DE421 is 1.3 m and 1.2 mm/s, and the DE430 is 1 m and 0.9 mm/s. The influence of ephemeris on the conversion of reference system is meter level and we recommend using DE430 or DE440 for lunar probe navigation and other lunar missions. |
| |
| Keywords: | planetary ephemerides lunar exploration lunar fixed coordinate system deep space exploration accuracy |
|
| 点击此处可从《大地测量与地球动力学》浏览原始摘要信息 |
| 点击此处可从《大地测量与地球动力学》下载免费的PDF全文 |
|
