Solving Thermal Control Challenges for CubeSats: Optimizing Passive Thermal Design

The advantages of utilizing CubeSat and Microsatellite buses are numerous and in high demand, but thermal control can pose a significant challenge. High power density, limited radiator size, and limited heater power are among the top concerns when designing a small satellite. This paper will discuss the most common thermal challenges and describe how passive thermal design can be optimized while holding traditional thermal margins. Four CubeSats - in low earth orbit with drastically different mission objectives and temperature control requirements - will be discussed. The thermal design, test, and flight results will be presented along with lessons learned and considerations for concurrent mechanical, electrical, and thermal design to allow for mission success.