TDOA BASED TRACKING MEASUREMENT FOR GEO SATELLITES ORBIT DETERMINATION: EVALUATION FOR THE SATELLITE OPERATORS

Authors : İbrahim ÖZ, Ümit Cezmi YILMAZ, Ümit GÜLER

Pages : 137-148

Doi:10.18038/estubtda.993185

View : 24 | Download : 7

Publication Date : 2022-03-30

Article Type : Research Paper

Abstract :The satellite`s orbit determination has recently evolved with new tracking data and data processing methods and algorithms developments. The satellite operators need the current and future motion of the satellites for operational purposes and use various methods to measure the tracking data. This study investigates the time difference of arrival insert ignore into journalissuearticles values(TDOA); based ground data measurement and processing of these tracking data to obtain orbital parameters and the communication satellite operators` use of the method. First, a conceptual ground station network was established to collect TDOA based tracking data. Then these data were processed to determine the orbits using a sequential process insert ignore into journalissuearticles values(SP); filter method. The results were analyzed by comparing radial, in-track, and cross-track positions and velocities for three satellites at different orbital locations. The mean root mean square error insert ignore into journalissuearticles values(RMSE); differences of radial, in-track, and cross-track insert ignore into journalissuearticles values(RIC); position values of three satellites are about 19 m, 5 m, and 1 m, respectively. Similarly, the mean RMSE differences of RIC velocity values are about 0.8 cm/s, 0.15 cm/s, 0.05 cm/s respectively. These values are below the success criteria that are satellite typical flight dynamics requirements. The estimated communication satellites orbit with TDOA based observation data are fully consistent with truth orbit parameters. The satellite operators can utilize the proposed TDOA measurement method with its benefits to estimate satellite orbit.
Keywords : TDOA measurement, Tracking data, Orbit determination, Communication satellite