Orbit determination result with the angle-only measurement from the optical tracking network, OWL-Net

The Optical Wide-field patroL-Network (OWL-Net) have been developed by Korea Astronomy and Space Science Institute for last six years. The optical tracking stations were installed in Mongolia, Morocco, Israel, United States and South Korea. The main goal of the OWL-Net is maintaining the domestic Low Earth Orbit satellites' ephemeris. The OWL-Net system uses the chopper and fast mount system to achieve dense optical measurements. By the end of 2016, five overseas optical tracking stations are under test observation phase. During the test period, various LEO objects including the domestic LEO satellites were observed for several weeks. We analyzed system error modeling by back-end system for observed space objects. The orbit determination process was done with batch least square orbit estimator using Matlab software. We attempted to compare orbit determination results with Two Line Elements and CPF files to analyze the overall system. This results can be used to predict the performance of the OWL-Net operations. The OWL-Net also can be used as a space debris optical tracking system.