Abstract
Nowadays, satellite communication is commonly used for civilians, especially in the broadcasting area. By using higher frequency bands in satellite communication, it has advantage of broader bandwidth to transmit more mounts of multimedia data required by human activity.After lots of team efforts, the Ka-band simulation program was built. It now remains to verify whether the simulation results are close to real channel via ROCSAT-1 or not. This task can be only be accomplished with great mount of data processing and comparison. Since the existing Ka-band simulation program doesn’t include the orbit model of ROCSAT-1, it is necessary to run some pre-simulation to get the orbit information of ROCSAT-1. Therefore, the existing procedure of running simulation is very complicated and consumes lots of time. In order to reduce the time of simulation, it is necessary to build orbit model of ROCSAT-1 of our own. Thus, the whole procedure of simulation could be simplified. And the time of simulation can be reduced to the least.The main relationship between ROCSAT-1 and the Earth is deduced by fundamental dynamics. After describing the whole theory of two-body mechanics, the technique to simplify and solve the problem will also be introduced. Next, The whole algorithm of orbit prediction will be described in detail and be compared with the SGP4 model. The whole procedure of simulation with orbit model integrated into the Ka-band simulation program will be described subsequently and followed by the simulation results using this new procedure. From now on, all works will be processed using this new procedure.