GPS CONTINUOUSLY OPERATING REFERENCE STATION (CORS) SELECTION TOWARDS REGIONAL GPS ORBIT DETERMINATION: A SIMULATED STUDY USING TRILATERATION TECHNIQUE

Global Positioning System (GPS) orbital error can be minimized using precise satellite orbit. These orbits are calculated GPS measurements from ground CORS. The distribution of the CORS involved in orbit determination is important, especially case regional determination. A an product generated locally distributed network and expected to improve measurement region. Satellite Position Dilution Precision (SPDOP) proposed as indicator measure geometry with respect satellite. simulated by calculating range satellites then used calculate position trilateration algorithm. Results shows SPDOP has a linear relationship accuracy. This study that for better selection