| 摘要 |
PURPOSE: To display navigation data on a displaying section in a more easily seeable and understandable state by making user catch three or four satellites at a receiving section for satellite navigation and processing measured values at an arithmetic processing section. CONSTITUTION: An arithmetic processing section 2 calculates the speed and azimuth and elevation of the advancing direction of a user through operation and displays the calculated values on a displaying section 3 in numerical values or graphs. After the differentiated value of the speed on the geocentric orthogonal coordinate system with respect to time is found by solving simultaneous speed equations constructed by using the position of the user and time offset found from simultaneous position equations on the coordinate system, each value required by the user is finally calculated by obtaining the differentiated value of the speed with respect to time on the coordinate system by transforming the geocentric orthogonal coordinate system into the geocentric orthogonal coordinate system at the position of the user. In addition, when the absolute value of each calculated value exceeds a threshold, an alarm is issued. |
