Xinjiang Altun Mountain National Nature Reserve, April 4 (Reporter Sun Zifa) The third Xinjiang comprehensive scientific expedition (Xinjiang scientific expedition) Altun Mountain field surgery team carried out research work in the Altun Mountain National Nature Reserve in early April, the construction of air-space-ground integrated comprehensive scientific research monitoring system (referred to as "air-space-ground network integration") is one of the two major projects of this scientific expedition, what are the main construction contents? How to use advanced scientific and technological means to support and serve Xinjiang's scientific research cause? What progress has been made so far? ...... These issues have attracted much attention.
Researcher Liu Tie braved strong sandstorm weather to investigate and investigate in the Sand Spring of Kumukuli Desert in Altun Mountain National Nature Reserve. Photo by Sun Zifa, reporter of China News Agency
Liu Tie, a researcher at the Xinjiang Institute of Ecology and Geography of the Xinjiang Institute of Ecology and Geography of the Chinese Academy of Sciences, was interviewed by a reporter from China News Agency during the Altun Mountain Field Surgical Expedition to explain in detail the construction and development of the space-space-ground network integration project.
Basic support for comprehensively carrying out scientific expeditions in Xinjiang
Liu Tie said that the third Xinjiang scientific expedition space-space-ground network integration project from the policy point of view, that is, the construction of "UAV-satellite remote sensing-ground station-Internet of Things" integrated resource investigation and environmental monitoring system, is an important guarantee for the integrated protection and system governance of "landscapes, rivers, forests, fields, lakes, grass, sand, and ice", and is also the basic support for comprehensively carrying out comprehensive scientific investigation in Xinjiang.
From the system point of view, the existing measuring station is divided into multiple departments, the observation elements and standards are not uniform, there are monitoring blank areas, the project implements the integrated monitoring concept, which is conducive to integrating forces and improving accuracy. In terms of means, large-scale scientific research projects need space-space-ground network coordination, unified management, and make up for the gap in data scale. In terms of data, remote sensing information products in arid areas without ground verification are difficult to obtain high accuracy, and it is necessary to combine ground observation data and UAV information verification.
He pointed out that the specific work content of the space-space-ground network integration project is to combine the data needs of various projects of Xinjiang scientific expeditions to supplement the construction of key blank areas, improve field observation stations and data automatic collection and transmission systems in less data areas; Research and development of a unified geographical framework, multi-scale, multi-source remote sensing monitoring system based on UAVs and satellites covering Xinjiang and surrounding areas; Research and development of an integrated monitoring system for space-space-ground network covering the whole Xinjiang based on the Internet of Things.
Improve the inversion accuracy of various satellite remote sensing data
Liu Tie said that since the implementation of the third Xinjiang scientific expedition air-space-ground network integration project, the project team of 111 people has worked in the field for 149 days, involving 6 rivers, 7 lakes and 22 counties, 26 installation and maintenance monitoring points, 60 survey sample areas, and a UAV operation area of more than 4,<> square kilometers.
The main progress of the project includes: the completion of the mobile terminal APP and the back-end management platform launch; Complete sensor R&D testing and prototype development and revision, improve stability, reduce power consumption, and complete relevant tests in the Pamirs; Improve the inversion accuracy of various satellite remote sensing data; Complete the construction of the "Xinjiang Scientific Research UAV Network Management and Control System"; Smooth implementation of UAV surface verification work.
Among them, in terms of improving the inversion accuracy of various satellite remote sensing data, first, the accuracy of automatic division of farmland plots is improved; The second is to use deep learning networks to realize deep learning methods for modeling and mapping of farmland plots, water bodies and glaciers in Xinjiang. The third is to improve the soil moisture inversion method, combine ground observation and UAV information verification, and realize the dynamic inversion of remote sensing soil moisture.
In terms of the construction of the "Xinjiang Scientific Research UAV Network Control System", all the projects and topics set up in the five major areas of the third Xinjiang scientific expedition Tarim River Basin, Ili River Basin, Irtysh River Basin, Tianshan North Slope Economic Belt and Tuha Basin are included in the organizational structure of the control system, which can support all UAV research teams of Xinjiang Scientific Expedition.
In short, the space-space-ground network integration project has initially formed a cross-departmental joint observation effect in hardware, and a scientific research APP, UAV platform and integrated platform have been formed on the software.
There is an urgent need to encrypt ground monitoring sites in Xinjiang
Liu Tie pointed out that the space-space-ground network integration project provided real-time surface observation and verified, coupled and high-precision remote sensing products for the third Xinjiang scientific expedition, thereby improving the level of integrated monitoring of Xinjiang's ecological environment and providing accurate data support for macro decision-making.
The construction of the space-space-ground network integration project is in the active stage in the medium term, and the most important challenge is that the industry sector has serious barriers and cannot smoothly carry out data sharing.
He also said frankly that the current technical level of the project is the same as that of domestic counterparts, but there is still a big gap with foreign countries, and there are three paths to choose for future development: first, how to serve local green development and serve the sustainable development of the ecological environment; The second is to unite all the observation forces that can be united to form a virtuous cycle of data sharing environment; The third is to form a mutually beneficial mechanism for data production and application to promote the healthy development of big data.
Liu Tie said that China's Xinjiang has a land area of more than 166.<> million square kilometers, the land is vast and sparsely populated, the current spatial density of national reference stations and even automatic monitoring points (national testing sites) in the water, soil and gas (water resources, soil, atmosphere, ecology) and other industries, relatively lower than the international average and even other provinces in China, in order to match the national policy of green mountains and green water ecological civilization, strengthen the power of "ground" in the integration of air-space-ground network, and effectively improve the density of ground monitoring station network is one of the necessary means. Therefore, Xinjiang urgently needs to build ground monitoring stations in encryption, integrate the observation force of the whole industry, and hope that through the joint efforts of the whole society, the goal of building a national testing station on average <>,<> square kilometers will be achieved as soon as possible. (End)