Forward motion compensation in earth observation satellite cameras via intentional mirror tilting Yer gözlem uydu kamerası için kasıtlı ayna eğiminin ileri hareket telafisi yöntemi olarak kullanılması
Journal of the Faculty of Engineering and Architecture of Gazi University, cilt.41, sa.2, ss.959-966, 2026 (SCI-Expanded, Scopus, TRDizin)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 41 Sayı: 2
- Basım Tarihi: 2026
- Doi Numarası: 10.17341/gazimmfd.1478887
- Dergi Adı: Journal of the Faculty of Engineering and Architecture of Gazi University
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Art Source, Compendex, TR DİZİN (ULAKBİM), Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Sayfa Sayıları: ss.959-966
- Anahtar Kelimeler: exposure time, forward motion compensation (FMC), High resolution earth observation satellite cameras, Korsch TMA, tilt mirror
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Ankara Üniversitesi Adresli: Evet
Özet
To achieve high image quality from Earth observation satellites, it is essential to reduce the ground sampling distance and maintain the image quality parameters at sufficient levels. These satellites, placed in the lowest possible orbit to detect smaller details and need to move at high speeds in their orbits to maintain their orbital altitudes. This motion requires satellite cameras to perform their tasks on a rapidly moving platform. Image motion occurring during the camera exposure leads to image flow in the optical system's focal plane, causing shifts in the acquired Earth images and resulting in image blur. Forward Motion Compensation (FMC) methods enable the limitation or reduction of the image flow in the focal plane of satellite cameras, allowing the acquisition of high-quality Earth images. In this study, the tilt mirror method is intended to be used as an FMC method. The optical design of the satellite camera based on the Korsch Three-Mirror Anastigmat telescope is performed. Changes in image quality due to using the secondary mirror as a tilt mirror in the optical system is analyzed using modulation transfer function and spot diagrams. The designed satellite camera optics demonstrated the allowance of tilting the secondary mirror within a range of ± 42 arc seconds. This tilt motion is shown to increase the exposure time by approximately 70 times for the designed Korsch Three-Mirror Anastigmat telescope-based satellite camera.