| 摘要 |
PURPOSE:To attain highly accurate position measurement economically by transmitting distance data from a mobile station and compensating the difference between the position of its own obtained by a satellite position measuring instrument on a fixed station and the real position of its own. CONSTITUTION:The satellite position measuring instrument is constituted with an antenna/amplifier part 1 for receiving a signal radio wave from an artificial satellite NDS, receiving parts ch1-ch4 for demodulating and measuring the received signal wave, the fixed station consisting of a microcomputer (MC)4 or the like for executing arithmetic and the control of the instrument, an antenna/amplifier part 1' for receiving a signal from the NDS, a receiving part R for demodulating the received signal wave, and a mobile station consisting of MC4'. The receiving part R for one channel receives signal waves successively from four NDSs and the MC4' calculates distance data from the received signal wave and transmits the calculated distance data to the fixed station through a communication equipment 6' to input the data to the MC4. The MC4 calculates the distance data including the factor of a time error and then obtains the deviation between the measured position obtained by erasing the factor of the time error and the known precise position by solving an equation. |
