Regional Positioning System Using TV Signals from Broodcasting Satellites

本文作者提出了一种利用日本地球静止卫星的国内定位系统。证明了利用广播卫星发射的电视同步信号进行测距，经过后处理，实现高精度定位是可能的。为了在移动的站实现实时定位，必须将卫星位置信息发送给用户。提交人试图利用通信卫星传送这些资料。与此同时，他们还尝试将通信卫星作为定位的发射器。因此，有必要获得卫星的准确位置。他们试图建立一个系统，通过VSAT（甚小口径终端）监测和传输通信卫星的位置，以实现实时定位。利用64 kHz的31位m序列信号作为对地静止通信卫星JCSAT-1在150 E的测距信号，从卫星与三个VSAT地面站之间的三个距离推断卫星的位置。在主站通过切换接收频率以接收直接从卫星发回的测距信号和通过卫星从两个从站发回的测距信号来测量它们。在第三年，我们分别用110 ° E的BS、162 ° E的CS和150 ° E的JCSAT三颗地球同步卫星进行了定位试验。这项技术是在前两年开发的。由卫星配置推导出的协方差矩阵的分量，由当前定位方法推导出的点，其中2drms为72 m，在纬度方向上广泛散布，这意味着。

A domestic positioning system using geostationary satellites in Japan has been propose by the present authors. It was proved that high accurate positioning was possible, though the post processing, by exploiting TV synchronous signals transmitted from broadcasting satellites for range measurement. In order to attain a real-time positioning at mobile stations, the satellite position information must be sent to users. The authors tried to use a communication satellite to transmit them. At the same time, they also tried to use the communication satellite as a transmitter for positioning as well. Thus, it is necessary to obtain the exact position of the satellite. They tried to establish a system to monitor and transmit the position of communication satellite by VSAT (Very Small Aperture Terminal) for real-time positioning. A 31- bit m- sequence signal of 64 kHz was used as a range finding signal to the geostationary communication satellite JCSAT-1 at 150 E.In the proposed system, the satellites position was deduced from three ranges between the satellite and three VSAT earth stations. They were measured at the master station by switching the reception frequency to receive range finding signals sent back from the satellite directly and the two slave stations through the satellite. The measured absolute ranges at the master station agree well with the values simultaneously measured at the satellite control center and have the standard deviation of 2m.We tried the positioning with three geostationary satellites, namely BS at 110ﾟE,CS at 162ﾟE,and JCSAT at 150ﾟE in the third year. The technique, developed in the first two years was used. The deduced points, of which the 2 drms is 72 m, by the present positioning method scattered widely in the latitudinal direction as the components of the covariance matrix, which is deduced from the satellites allocation, imply.