Hyosang Yoon

Apr 23, 2023 | mdpi.com | Taeho Kim |Natnael S. Zewge |Hyochoong Bang |Hyosang Yoon

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.