Core Insights - The testing conducted by the Southwest Air Traffic Management Bureau and the Air Traffic Control Center aims to enhance air traffic management capabilities along the Chengdu-Lhasa route [1][2] - The testing site in Tibet's Jiangda County, at an altitude of 4542 meters, faced challenges such as low temperatures, oxygen deficiency, and complex terrain [1] - The successful completion of the VHF communication testing provides a solid data foundation for future construction of communication facilities [2] Group 1 - The testing was conducted from September 15 to 17, following preliminary reconnaissance and ADS-B testing in June [1] - The workgroup utilized ADS-B equipment for real-time monitoring of flights and portable VHF devices to verify low-altitude communication signal quality [1] - The signal coverage results matched theoretical models, allowing for effective collaboration with existing VHF stations in Daocheng and Kangding [1] Group 2 - This testing provides critical data support for the construction of air traffic communication facilities, which will enhance the efficiency and safety redundancy of regional aviation operations [2] - The improvements are significant for ensuring the safety and smooth operation of high-altitude flight routes [2]