The Reliability Analysis of Remote Sensing Observation Platform based on Unmanned Aerial Vehicle (UAV) in Mountain Areas——An Experiment Case Study in Zoige Plateau
Unmanned Aerial Vehicle (UAV) remote sensing observation faces many challenges under the complex condition in mountain areas,and the reliability analysis of remote sensing observation platform based on UAV is necessary for image mosaic,data application and improvement for UAV platform and flight plan.In this paper,we present an observation platform for multi-source remote sensing data acquisition in mountain areas based on low-altitude UAV system,which is detailed on components,performance and sensor parameters.The reliability analysis method for UAV remote sensing observation platform was developed on the basis of "Specifications for low-altitude digital aerial photography".The remote sensing data acquired from July 25,2014 in Zoige plateau were used to quantitatively evaluate the reliability of the low-altitude UAV platform.The results indicate an excellent performance under the complex condition in mountain areas.The mean course overlap,mean lateral overlap,mean obliquity angle of the UAV image,and the mean swing angle of inner-route and inter-route are estimated to be 73.58%,55.07%,2.23°,1.36°and 10.41° respectively.Based on the GPS records,we determine the mean deviation from the route,the maximum bending degree of the route and the maximum variance of flight height are 5.42m,0.19% and 5m respectively,all the indicators is far better than the reference titled "specifications for low-altitude digital aerial photography".According to study,the irregularity between imaging plane of camera and flight direction of UAV may lead to the increase of the inter-route swing angle,and it is more stable when the UAV flies against the wind.