| 摘要 |
PROBLEM TO BE SOLVED: To provide a navigation device for enhancing setting accuracy on an error range. SOLUTION: This navigation device is equipped with: a GPS receiver 2 for receiving radio waves transmitted from a plurality of GPS satellites to output a measured position; an error circle radius calculation part 14 for detecting respective elevation angle values of the plurality of GPS satellites used for calculating the measured position while detecting the gravity center position of the plurality of GPS satellites to set the error range on the measured position based on the detected elevation angle and the center position; and a vehicle position calculation part 20 for calculating a present position by using the measured position output from the GPS receiver 2 and the error range set by the calculation part 14. COPYRIGHT: (C)2006,JPO&NCIPI |
