Hyochoong Bang

1. Introduction The NewSpace era has opened up space competence to new heights, and the requirements to accomplish this are challenging due to space environment concerns. This is also exciting, as it created numerous possibilities and opportunities for the next-generation satellites to take a leap toward solving mainstream problems [1,2,3]. Small satellites [4] have been an important pillar of this new age of exploration and enhanced technology needs.

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Abstract : Star images from star trackers are usually defocused to capture stars over an exposure time for better centroid measurements. While a satellite is maneuvering, the star point on the screen of the camera is affected by the satellite, which results in the degradation of centroid measurement accuracy. Additionally, this could result in a worse star vector outcome. For geostationary satellites, onboard thrusters are used to maintain or change orbit parameters under orbit disturbances.