【摘要】 GPS无线电掩星技术是从行星无线电遥感探测技术发展而来.从80 年代末以来,这种技术在气象学的应用研究中获得新的发展.自从第一颗实验低轨地球卫星(LEO 卫星)MicroLab1 在1995 年4 月3 日发射升空以后,它所获得的数据和成果已经证实了GPS无线电掩星技术在地球大气分层结构的探测上所具有的潜在科学价值.但是,延长地面测点的时间覆盖无疑对这种技术在气象和大气的研究上有很大的好处.因而提出一种用低轨通约卫星的方法来控制地面测点的设想.模拟LEO 卫星的结果表明:这种方法可以在地面测点达到60 —200 天左右的时间序列,而其地面漂移小于100 公里.更多还原

【Abstract】 The GPS radio occultation technique used to monitor the Earth atmosphere has been transplanted from the remote sensing application in planetary atmospheric limb sounding. Since the end of 1980’s, this technique has been widely used in meteorological research. The launch of the first experimental LEO statellite Microlab in 1995 opened a new era of GPS meteorology, and its experimental data and achievements have justified its potential scientific role in the Earth atmospheric profiles. Moreover, the long sequential data from ground grazing points will definitely benefit the meteorological research applications of LEO satellites. An idea of using a commensurate LEO satellite to control grazing points on the Earth surface is proposed in this paper. Simultaneous computations have shown that in the period of about 60～200 days or still longer the drifts of grazing points on Earth surface might be controlled in less than 100 km.更多还原