GB/T 38924.2-2020 is applicable to civil light and small unmanned aircraft systems (including aircraft and ground stations) with a take-off weight ranging from 0.25 kg to 150 kg, focusing on test methods in low-temperature environments. The standard specifies the condition parameters for two types of tests: low-temperature storage and low-temperature operation. It stipulates the use of a low-temperature test chamber to simulate the target low-temperature environment, controlling the temperature at a set rate and maintaining it for a specified duration. By testing the functionality and performance indicators of the unmanned aircraft system, its tolerance in low-temperature environments is verified. The standard also standardizes requirements for interruption recovery during the test process, criteria for result evaluation, and the content of the test report.