Optik ve radar sistemlerine dayalı olarak uydu yörüngesinin belirlenmesi

Preliminary orbit determination methods are detailed. Then, the best preliminary orbit determination methods for optical and radar systems are selected to apply to the inputs for this thesis. Success of Gauss method is proved for angle only data orbital problems and Gibbs method is the best orbit determining method for radar systems. Orbit determination code is written for Gauss and Gibbs method in Matlab. Right ascension and declination data for the specified time are measured by telescope in Turksat Main Campus. Then, these data are used as input for Gauss method, so orbital parameters and state vectors are found. Likewise, range, azimuth and elevation data of the Turksat satellites for the specified time are measured by antenna in Turksat Main Campus. Then, these data are used as input for Gibbs method, so orbital parameters and state vectors are found. There is selection button for using telescope and antenna data in Gauss method Matlab code to find orbital parameters and just compare the results and reliability of telescope and antenna data. For this reason, right ascension and declination is calculated in the code by using azimuth and elevation data for antenna choice. Furthermore, a free open source planetarium software Stellarium that shows 3D simulation of sky and gives angle and position data is utilized to compare results that are calculated using the measured data in Turksat. Additionally, GORDAM software orbital parameter results, that was used by Turksat for orbit determination, was obtained for comparison.