| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To efficiently collect observation data in a telemeter system. <P>SOLUTION: A monitoring station 28 havingπ/4 shift QPSK digital radio equipment 72 divides a plurality of observation stations 24 respectively havingπ/4 shift QPSK digital radio equipment 34 into groups for each different period of data collection and transmits a designated group calling control signal to an observation station 24 of a needed group at a necessary time. When a plurality of observation stations 24 belonging to a designated group receive the calling control signal, the observation stations 24 sequentially transmit observation data, and the monitoring station 28 efficiently collects the observation data by sequentially receiving the observation data. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
