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An algorithm to automatically extract coordinate and time information from optical observation data of geostationary orbit\udsatellites (GEO satellites) or geosynchronous orbit satellites (GOS satellites) is developed. The optical wide-field patrol\udsystem is capable of automatic observation using a pre-arranged schedule. Therefore, if this type of automatic analysis\udalgorithm is available, daily unmanned monitoring of GEO satellites can be possible. For data acquisition for development,\udthe COMS1 satellite was observed with 1-s exposure time and 1-m interval. The images were grouped and processed in\udterms of “action”, and each action was composed of six or nine successive images. First, a reference image with the best\udquality in one action was selected. Next, the rest of the images in the action were geometrically transformed to fit in the\udhorizontal coordinate system (expressed in azimuthal angle and elevation) of the reference image. Then, these images were\udmedian-combined to retain only the possible non-moving GEO candidates. By reverting the coordinate transformation of\udthe positions of these GEO satellite candidates, the final coordinates could be calculated

Development of a Reduction Algorithm of GEO Satellite Optical Observation Data for Optical Wide Field Patrol (OWL)