| 摘要 |
<p>PURPOSE:To collect a monitor data in a short time by predetermining a reference polling signal from a central monitor satellite ground station and a monitor timing of each monitored satellite ground station with respect to the reference polling signal. CONSTITUTION:Each of monitored satellite ground stations 2a-2c sends sequentially a monitor signal and when a central monitor satellite ground station 1 receives a monitor signal 7c from the final monitored satellite ground station 2c, the central monitor satellite ground station 1 sends a reference polling signal 6 of a succeeding monitor period again. The monitor signal is sequentially returned from each of the monitored satellite ground stations 2a-2c to the central monitor satellite ground station l sending the reference polling signal 6 and the central monitor satellite ground station 1 collects a data from each of the monitored satellite ground stations 2a-2c. In this case, the timing of the monitor signal of each of the monitored satellite ground stations 2a-2c is predetermined. Thus, the monitor data are collected in a short time.</p> |
