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  • 3-d imaging lidar for earth and cosmic observations

    Paper ID



    • Xu Chunxiao


    Beijing Institute of Space Mechanics & Electricity






    In this paper, the latest applications and development of space-born LiDAR both in China and abroad were briefly described first, from which we can see space-born LiDAR has many advantages compared to traditional remote sensing method and is playing more and more important role for earth and cosmic observations. 3-D imaging LiDAR system used in space is quite a good try, which can not only get the accurate height of the objects on earth in a global scale, but also can obtain the coordinate (x,y) for each target and get a 3-D imaging finally. So, in the following content of this paper, how to realize high resolution 3-D images for earth and cosmic observations are illustrated. Considering the well developed passive remote sensing technology, as well as the fast developing laser technology, we decided to use a high resolution camera, a multi-spectrometer, a high repetition frequency LD-pumped Nd:YAG laser altimeter, an integrated inertial navigation system (INS) and a global positioning system (GPS), which together composed a LiDAR imaging system. Using this system , we can easily get high resolution 3-D image of target in global scale by combining the three-dimensional coordinate information and two-dimensional optical information. Then, some key technologies were analyzed separately in the paper, including how to gain and deal with data quickly, how to combine altitude data and image data together and how to get high power laser output in space environment. After all these descriptions above, we made a high expectation for realizing the space-born 3-D imaging LiDAR system based on high resolution imaging technology, LIDAR technology, and high power laser technology in the future. And we believe that such a LiDAR imaging system will have great meaning not only for globe surface observing and surveying, but also for star mapping and plant cover analysis.