多卫星高度计数据确定月面地形方法研究

Size and shape are the fundamental quantities to provide insights into interiors and origins of planetary bodies. The topography of the Moon is rudimentary and recently available laser altimeter measurements from China's Chang'E-1 (CE-1), Japan's SELenological and ENgineering Explorer (SELENE), and U.S.'s Lunar Reconnaissance Orbiter (LRO) have already and will significantly improve the accuracy and resolution of the lunar topography model towards addressing open lunar science questions, including quantifying and studying the causes of global scale-asymmetry, impact basin sizes/location/features towards studying of the possible lunar reorientation, lunar isostacy, and constraints on lunar tidal parameters. We propose development of techniques to conduct dual-satellite crossover orbit adjustments, geolocation correction, regional topography enhancement by combining SELENE camera data with laser altimeter data, regional gravity field inversion using SELENE and CE-1 close-approach (altitudes <50 km) tracking and orbit data using a Slepian based localized function, and conduct gravity and topography correlation analysis over the Oceanus Procellarum study region, to study lunar isostacy and seleno-physics. .The anticipated results of improved global lunar topography data (Level 1, geophysical data records, and Level 2, topography models) and topography solutions, will benefit the applied lunar science such as providing crucial data for decision making on the selection of lunar landing sites. These data will be provided to the community and the general public via the Planetary Data System (PDS) for community usage.

随着月球探测的新一轮热潮，利用月球探测器轨道和高度计数据进行月面地形建模具有重要的意义。本课题充分利用我国月球探测器测轨数据和激光测高数据，并结合日本SELENE、美国LRO轨道数据和高度计数据，研究月球探测器轨道确定模型，评估月球探测器轨道性能，建立轨道误差到高度计测量的误差传播机理定性定量的分析;研究高度计数据处理方法和单卫星和双卫星重叠高度计修正技术，进行交叉高度计平差，采用频谱分析方法，对高度计数据残差进行时域、频域分析，确定误差源。利用LRO高度计数得到高精度月面地形图的同时综合处理多颗卫星高度计数据生成多星组合地形模型，并进行验证和评估。

随着月球探测的新一轮热潮，利用月球探测器轨道和高度计数据进行月面地形建模具有重要的意义。本课题充分利用我国月球探测器测轨数据和激光测高数据，并结合日本SELENE、美国LRO轨道数据和高度计数据，研究月球探测器轨道确定模型，评估月球探测器轨道性能，建立轨道误差到高度计测量的误差传播机理定性定量的分析;研究高度计数据处理方法和单卫星和双卫星重叠高度计修正技术，进行交叉高度计平差，采用频谱分析方法，对高度计数据残差进行时域、频域分析，确定误差源。利用LRO高度计数得到高精度月面地形图的同时综合处理多颗卫星高度计数据生成多星组合地形模型，并进行验证和评估。