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GRO(Global Navigation satellite system Radio Occultation)和LRO(Low Earth Orbit Radio Occultation)联合组网探测地球大气是无线电掩星探测技术的主要发展方向.本文根据掩星事件的数学判据,仿真分析了LEO卫星主要轨道参数对CRO和LRO掩星事件数量和全球分布情况的影响.研究表明:卫星轨道越低GRO掩星事件越多:轨道倾角在30°和75°之间时,GRO掩星事件较多.全球覆盖率也较大;利用极轨卫星进行LRO掩星探测时.LRO掩星事件较均匀地分布在各纬度带.研究成果对GRO和LRO联合星座设计具有参考价值.
The combination of GRO (Global Navigation satellite system Radio Occultation) and LRO (Low Earth Orbit Radio Occultation) to detect the Earth’s atmosphere is the main development direction of radio occultation detection technology.Based on the mathematical criteria of occultation events, this paper simulates the LEO satellite The main orbital parameters influence the occurence and global distribution of occurences of CRO and LRO.The results show that the lower the orbit of the satellite is, the more the occultation events occur: the occurence of GRO is more when the orbital inclination is between 30 ° and 75 ° The global coverage is also large, and the LRO occultation events are more evenly distributed in latitudes when using polar orbit satellite for LRO occultation exploration.The research results have reference value for the constellation design of GRO and LRO.