【摘要】 利用嫦娥一号绕月卫星激光高度计数据获取得到的新的360阶次的地形模型CLTMs03,开展了初步应用研究,包括对嫦娥一号CCD立体相机数据进行了校对,发现并了解立体相机分析中的约900 m的垂向系统误差;利用撞击坑计数法,基于标校后的照相数据对嫦娥一号地形中新发现的玉兔火山区域的年龄特征进行了分析;结合新的CLTM-s03地形模型和CEGM-02重力场模型,新证实了西拉德撞击坑是一个布格质量瘤异常区域。更多还原

【Abstract】 Primary studies were carried out using the new 360 orders and degrees of lunar topography model CLTM-s03 obtained by laser altimetry data of Chang’E-1 lunar orbiter.3D CCD image data was validated; a constant vertical bias of ~900 m in the CCD DTM was found and corrected track by track.The differences between CCD DTM and CLTM-s03 are close to2.0 km.The errors are mainly from orbits,angle bias for the CCD camera installing,as well as the image error.To obtain a higher accuracy lunar DTM of 20-30 m at radical direction,advantages of both LAM DEM and CCD DTM are required.The long wavelength parts of DTM are suggested to use the LAM DEM model which may cover 0-360 orders and degrees.The middle and short wavelength parts will use the 3D CCD images,where the long wavelength parts of CCD have been cancelled.Igneous and impacting activity dominates the evolution history of the Moon.By using Chang’E-1 image data,we found several shield volcanoes,including YUTU shield volcano with Marius Hills and the Aristarchus Plateau shield volcano.The classical lunar surface crater density counting method was used to study the age of them based on the validated CCD image data.It is found that the surface impacting age of YUTU shield volcano is about 3.52±0.02 Ga.By combining the topography data with the gravity data,it is found that this shield volcanic area has higher crustal density,lower elasticity thickness and remarkable inner magma load.Additionally,we removed the terrestrial gravity constrained by topography from free air gravity,and then obtained the Buguar gravity of the Moon.The high resolution of gravity and topography data help us to find three new mass concentrating areas under the surface of the Moon.The Szilard Crater,one of the new mascons,is located to the northeast of Richardson Crater on the farside of the Moon.The newly identified mascons will benefit the investigation of the lunar igneous evolution.更多还原