Study of solar activity impact on THAICHOTE (THEOS) orbit

Solar activities cast impacts on the operations of satellites in several aspects of the orbit mechanics segment. These impacts include the precision of orbit determination, the number of necessary station keeping maneuvers, and the awareness of close-approaches with space objects. All of which affect the mission, the lifetime of satellite, as well as the risk of collision with space debris. The purpose of this study is to examine the extent of these impacts on the THAICHOTE satellite and present the practical solutions which are implemented in daily operations. The results of this study will be useful for the design the in-house orbit determination software currently under development.