The article presents a performance analysis of the small satellite thermocontrol system based on the telemetry data received by the ground control complex GCC-SSAU. The performance analysis was carried out on “AIST” (RS43-as) and “AIST” (RS-41at) small satellites. Ground testing of the thermocontrol system was performed in the thermo-vacuum chamber on the testing facility of RS? “Progress”. The article gives an overview of the operational capabilities of the thermocontrol system. The performance analysis of the system is carried out and the primary guidelines for future thermovacuum testing are given.