To protect and manage the Korean space assets including satellites, it is important to have precise positions and orbit information of each space objects. While Korea currently lacks optical observatories dedicated to satellite tracking, the Korea Astronomy and Space Science Institute (KASI) is planning to establish an optical observatory for the active generation of space information. However, due to geopolitical reasons, it is difficult to acquire an adequately sufficient number of optical satellite observatories in Korea. Against this backdrop, this study examined the possible locations for such observatories, and performed simulations to determine the differences in precision of optical orbit estimation results in relation to the relative baseline distance between observatories. To simulate more realistic conditions of optical observation, white noise was introduced to generate observation data, which was then used to investigate the effects of baseline distance between optical observatories and the simulated white noise. We generated the optical observations with white noise to simulate the actual observation, estimated the orbits with several combinations of observation data from the observatories of various baseline differences, and compared the estimated orbits to check the improvement of precision. As a result, the effect of the baseline distance in combined optical GEO satellite observation is obvious but small compared to the observation resolution limit of optical GEO observation.

1. INTRODUCTION
 2. OPTICAL OBSERVATION OF GEO SATELLITE
  2.1 GEO Satellite and Orbit Characteristics
 3. UTILIZATION OF ORBIT DETERMINATIONTOOL KIT (ODTK)
  3.1 Characteristics of ODTK
 4. SIMULATION OF OPTICAL OBSERVATIONAND ITS NOISE
  4.1 Baseline of Dual Optical Observatory Setup
  4.2 Simulation Condition
  4.3 Observation Noise Generation
  4.4 Multiple Baseline Comparison
 5. ANALYSIS AND SUMMARY
 ACKNOWLEDGEMENTS
 REFERENCES

• Ju Young Son(Korea University of Science and Technology,Korea Astronomy and Space Science Institute,University of Maryland Baltimore County)
• Jung Hyun Jo(Korea University of Science and Technology,Korea Astronomy and Space Science Institute,University of Maryland Baltimore County, Baltimore) Corresponding Author
• Jin Choi(Korea University of Science and Technology,Korea Astronomy and Space Science Institute)