Differential GPS receiving device and differential GPS determination system

摘要

PROBLEM TO BE SOLVED: To provide a DGPS(differential global positioning system) that can detect more correct receive time of DGPS data and obtain a correct measuring position by swiftly correcting a receive time detecting clock without enlarging the circuit scale. ;SOLUTION: A DGPS data detecting means 12 detects DGPS data from FM multiple data received by an FM multiple data receiving device 11. The time of detection is detected in a DGPS data receive time detecting means 13 through a receive time detecting clock 14 corrected by a time correcting circuit 16. The time correcting circuit 16 corrects the receive time detecting clock 14 so as to have correct time on the basis of time information from a time information input means 15 based on a GPS receiver and FM multiple boradcasting. A DGPS correction value computing means 17 puts together the received DGPS data and the DGPS data receive time to lead out the DGPS correction value.;COPYRIGHT: (C)1998,JPO