交会图形强度加权的嫦娥一号三线阵影像光束法平差

发布时间：2018-10-20 14:41

【摘要】：月球探测是深空探测的起点，也是一项“开疆拓土”的巨大工程，“利用我国首次获得的第一手月球科学探测数据，，研究出一流的科技创新成果”是温总理对嫦娥工程后续工作的明确要求，高精度、高空间分辨率的各类月球地形测绘产品，是开展月球地质学研究的基础，也是后续月球探测工程的核心工作之一。2007年10月24日在西昌卫星发射中心成功发射了我国首颗月球探测器——嫦娥一号，其首要的科学目标是获取月球表面三维影像，由搭载在卫星上三线阵CCD立体相机和激光高度计来联合实现。早在上世纪80年代，航空三线阵摄影测量方法就已经被提出，经过几十年的发展其理论方法已经很成熟，但是该方法对外方位元素的测定精度要求很高，并且要有高精度地面控制点参与平差，否则航带模型会出现严重的扭曲变形，而且三线阵区域网平差技术的实现难度要远远大于框幅式相机，但线阵推扫相机被广泛的应用于卫星摄影测量的最主要原因是其比框幅式相机更容易实现高分辨率成像，更能有效的节省造价成本和大大的减少数据量。对于嫦娥一号而言，一方面一般科研机构无权获得缺少卫星轨道和姿态测量数据、相机的内方位元素试验区投影参数等，故只能通过光束法基于有理多项式的交会图形强度加权平差技术来解决，这是本文研究的主要内容。另外一方面，无高精度的月面控制点作为控制条件，在这种条件下如何克服航空三线阵摄影测量中可能出现的航带模型扭曲变形的现象，以保证数据处理的精度，满足科学目标的要求，是本研究需要解决的关键问题之一。通过本文的研究，发展了地面摄影测量中利用有理函数模型计算推扫式相机的前方交会模型和光束法平差模型，提出了适用于月球三线阵影像的交会方法，用于平差处理中的同名像点、控制点的月面坐标的计算；提出了优化于月球三线阵影像的区域网平差方法，给出了平差处理的技术流程，本文提出的平差方法既适用于月面局部区域的平差处理，又能很好的解决虹湾地区数据处理的问题。
[Abstract]:Lunar exploration is not only the starting point of deep space exploration, but also a huge project of "opening up the frontier". "using the first-hand lunar scientific exploration data obtained for the first time in China, It is the clear requirement of Premier Wen for the follow-up work of Chang'e Project that Premier Wen Jiabao has made all kinds of lunar topographic mapping products with high precision and high spatial resolution, which is the basis for carrying out the research on lunar geology. On October 24, 2007, China's first lunar probe, Chang'e 1, was successfully launched at the Xichang Satellite launch Center. Its primary scientific goal is to obtain three-dimensional images of the lunar surface. By carrying on the satellite three-line array CCD stereo camera and laser altimeter to achieve joint. As early as the 1980s, the aerial three-line array photogrammetry method has been put forward. After decades of development, its theoretical method has been very mature, but the precision of the external azimuth elements of this method is very high. And there must be high precision ground control points to participate in the adjustment, otherwise the belt model will appear serious distortion, and the difficulty of realizing the adjustment technology of three-line array area network is much more difficult than the frame type camera. However, the main reason why linear push-sweep camera is widely used in satellite photogrammetry is that it is easier to realize high-resolution imaging than frame type camera, and can save cost and greatly reduce the amount of data. For Chang'e 1, on the one hand, the general scientific research institutions have no right to obtain the missing satellite orbit and attitude measurement data, the projection parameters of the camera's inner azimuth element test area, etc. Therefore, it can only be solved by the method of beam method based on rational polynomial rendezvous graph intensity weighted adjustment technology, which is the main content of this paper. On the other hand, in order to ensure the accuracy of data processing, how to overcome the distortion of the belt model in the aerial three-line array photogrammetry without the control point of the lunar surface with high precision as the control condition, Meeting the requirements of scientific objectives is one of the key problems to be solved in this study. Through the research in this paper, the rational function model is developed to calculate the forward intersection model and the beam method adjustment model of the push-sweep camera in ground photogrammetry, and the intersection method suitable for the lunar three-wire array image is put forward. It is used to calculate the coordinates of the same image point and the control point in the adjustment processing, and the adjustment method of the regional network optimized for the lunar three-wire array image is put forward, and the technical flow of the adjustment processing is given. The adjustment method presented in this paper is not only suitable for the adjustment of the local area of the lunar surface, but also can solve the problem of data processing in Hongwan area.
【学位授予单位】：中国地质大学（北京）
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P207;P236

【相似文献】