For Multi-sensor Airborne Remote Sensing Monitoring System For Data Processing Method

Low-altitude unmanned airship remote monitoring system,as a new type of aviation remote sensing technology, can be used in "digital city" construction, land use dynamic monitoring, mineral exploration, geological exploration of environment and many other areas. Key Lab of three-dimensional information acquisition and application of the Ministry of Education in Capital Normal University combined with several companie, successfully developed an unmanned airship remote monitoring system in April 2009.Through a series of flying test and experiments,we got a large number of images and other data. On this basis,we concluded the data acquisition and processing methods on low-altitude unmanned airship remote sensing system and provide a useful attempt to broaden the field of applications of the low-altitude unmanned airship remote sensing system.Airborne LiDAR (Light Detection And Ranging) system is a new type of earth observation system.It integrates laser ranging technology, computer technology and IMU/DGPS technology in one, provides a new technological means in obtaining high spatial and temporal resolution of geo-spatial information. Airborne LiDAR technology has the advantages of high degree of automation, little affected by the weather, short production cycle and high data precision. The Engineering Center of Spatial Information Technology of Capital Normal University imported the CP560 Airborne LiDAR system produced by RIEGL company from Austria, and on this basis, an image acquisition and exposure control system has been installed, which equipped with Hasselblad H3D-39 digital camera. Through a series of aerial flight experiments we summarized the data acquisition and processing workflow of airborne LiDAR system and accumulated valuable experience in using new means of remote sensing for aviation mapping.The main research contents of this article include the following aspects:(1) Built up the low altitude remote sensing monitoring system for unmanned airship, according to the actual flighting test,we summarized the workflow of data acquisition of low-altitude unmanned airship remote sensing system.In addition, real-time evalution methods for the quality of the image data acquired by the unmanned airship remote sensing system has been proposed.(2) Based on characteristics of unmanned airship remote sensing system,a panoramic images stitching solution has been proposed which based on SIFT algorithm and a toolbox named Panorama Tools. Comparing this solution with the method of producing orthophoto using LPS software,we summarizes the advantages and disadvantages of the two data processing method and its application fields.(3) Described the composition and working principle of airborne LiDAR system.Then analysised errors of airborne LiDAR system.In the end,this article summarized airborne LiDAR data acquisition and process workflow from actual flight test.(4) Introduced preprocessing and calibration workflow of airborne LiDAR system.Through processing the calibration field data we got the three misalignment angle of the airborne LiDAR system and laid the foundation for post-processing of the LiDAR data.(5) Combined their own characteristics of Low-altitude unmanned airship remote monitoring system and airborne LiDAR system, a concept named cross-platform multi-sensor monitoring system has been proposed, with both advantages and disadvantages of the two systems,further working direction and research ideas has been proposed.