Research And Analysis On Multiple Satellites On-Orbit Communication Link Of The New Generation Polar Orbit Meteorological Satellite

FengYun-3Satellite is the new generation polar orbit meteorological satellite,which is widely used in monitor natural hazards, environment, military meteorologicalinformation and dedicated weather information. FY-3well supports the meteorologicalresearch and development. Satellite communication system design is a very complicatedprocess. If we expect the performance of the satellite communication system to be thebest, we need to coordinate various factors. On one hand, with the rapid development ofthe satellite communications, available space orbit resources and frequency resourcesare reducing day by day, research about multiple satelltes in orbit is more and moreimportant, and interference issues among many satellites is increasingly serious. Deeplystudying the issue among multiple satellites on-orbit has been very important in thedevelopment of meteorological satellite.Currently, the research works focus on communication link analysis and design onsingle satellite, however there is few communication link researches about multiplesatellites. The interference analysis is quite important for the link analysis of multiplesatellites. Different from single satellite link design, the interference in multiplesatellites includes adjacent satellite interference and adjacent channel interference. Theformer research considered the adjacent interference while ignoring the rainloss. Thispaper proposes a new method considering all kinds of interference existing in themultiple satellites. Firstly, we study rain attenuation model, and analyze the conditionsinfluencing rainloss. Secondly, we analyze communication link budget when multiplesatellites are on-orbit. Analysis mothod about multiple satellites link is the key point.Considing various interference, we emphasize adjacent satellite interference andadjacent channel interference. After the interrerernce model in multiple satellites is setup, the minimum angle should meet the system condition to let these satellites worknormally. Furthermore, the matlab model is built to verifiy the the rightness of ouranalysis methods.