GB/T 38924.10-2020 applies to civil light and small unmanned aircraft systems (including aircraft and ground control stations) with a takeoff weight between 0.25 kg and 150 kg, focusing on test methods in sandy and dusty environments. The standard specifies test conditions, procedures, requirements for interruption and recovery, result evaluation, and reporting specifications. It uses a sand and dust test chamber to simulate sandy and dusty environments. By controlling parameters such as temperature, relative humidity, wind speed, and dust concentration, the unmanned aircraft system is tested in stages from various directions. During certain stages, the system is powered on to inspect its functional performance, thereby verifying its tolerance to airflow carrying sand and dust.