| 摘要 |
<p>PROBLEM TO BE SOLVED: To construct a system that can improve a measurement accuracy inexpensively and easily. SOLUTION: A reception carrier signal that is received by a main, large antenna 4 is converted to a frequency by a down converter 9a at a main system, the phase of a main system reception carrier is captured by a tracking reception device 5, and a signal where it is synchronized to a reference phase (ωt) is obtained. On the other hand, in a sub-system, a reception carrier signal with a phase (ωt+ϕ) being received by a subsystem compact antenna 3 is subjected to frequency conversion by a down converter 9a. A phase difference measuring device 10 separates the above tracking reference phase signal into sin and cos components, each of them is multiplied by the above IF signal from the subsystem, and then an integration processing is made. A phase measurement part performs the calculation of tan<-1> to the above sin component and cos component and measures a phase differenceϕof the reception carrier in the main and subsystems. A computer 15 calculates an angleϕin the direction of a stationary satellite viewed from a ground station based on the angle data and phase differenceθof an antenna direction angle reading device.</p> |
