First time! Effective Detection Data of Mountain Glaciers Obtained by Aerial Remote Sensing System
2023-05-12
As an important component of China's second comprehensive scientific investigation and research on the Qinghai Tibet Plateau and the scientific demonstration plan for civilian P-band Synthetic Aperture Radar (SAR) satellites, recently, the Qinghai Tibet Plateau Research Institute of the Chinese Academy of Sciences, the Aerospace Information Innovation Research Institute of the Chinese Academy of Sciences, the Northwest Ecological Environment Research Institute of the Chinese Academy of Sciences The Institute of Precision Measurement Science and Technology Innovation of the Chinese Academy of Sciences and Wuhan University organized and implemented a joint scientific experiment on glacier perspective aviation and ground in the Bayi Glacier Area of Haibei Tibetan Autonomous Prefecture, Qinghai Province. This is the first time in the world to carry out the joint glacier detection experiment of P/L/VHF three band radar (P band, L band, VHF band) based on the aviation platform. This experiment started on March 20th and is expected to end in mid May. So far, 11 sorties have been flown, including 7 sorties for P/L band tomography and interference imaging, 4 sorties for VHF band perspective imaging, and 4.6TB of effective data has been obtained. We have simultaneously carried out visible light and LiDAR flight observations on ice surfaces, as well as calibration of airborne instruments on ice surfaces, measurement of glacier thickness using ground penetrating radar, and ultra long line of sight 3D laser point cloud imaging. The preliminary analysis based on the acquired data shows that the three-dimensional reconstruction results of P-band and L band synthetic aperture radar (SAR) can reflect the change trend of glacier surface elevation, which is basically consistent with the results of airborne three-dimensional laser radar and ground survey; The VHF data provides clear glacier profiles, which can clearly reflect the interface lines between the ice surface and the atmosphere, glaciers and bedrock, as well as manually placed electrical anomalies located at a depth of 80 meters in the ice core borehole. The depth explained by the profile is basically consistent with the ground detection results. According to the introduction, the above preliminary research results indicate that the experiment has preliminarily verified the comprehensive observation technology of glacier characteristics and obtained effective data, while also verifying the feasibility of the P/L/VHF band joint experiment. Experts say that this experiment is of great significance in solving the problem of remote sensing monitoring of glacier thickness, breaking through the bottleneck of ice reserve estimation, and leading the next generation of remote sensing technology for the cryosphere. (Outlook New Era Network)
Edit:qihang Responsible editor:xinglan
Source:GMW.cn
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