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* The [[Active Thermal Control System]] (ATCS) uses a mechanically-pumped fluid to perform heat transfer. Although this approach is more complex, the ATCS is able to handle much greater heat loads and provide a degree of control over how heat loads are managed.
* The [[Passive Thermal Control System]] consists of insulation, coatings, heaters, and heat-pipe radiators. Its components generally have few operational requirements and require low maintenance. In addition, PTCS components are also less complex and are easier to implement.
In general LEO satellites use passive thermal control systems because of their low maintenance requirements and less complexity.
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