Patent ID: 8005635
Filing Date: 2011-08-23
Classification: G01C

Abstract:
1. A self-calibrated azimuth and attitude accuracy enhancing system, which is a self-contained system, comprising: two kinds of inertial sensors only, wherein the first kind of inertial sensor comprises a first one-axis gyro measuring an inertial angular rate; and a second one-axis gyro measuring an inertial angular rate wherein said first one-axis gyro and said second one-axis gyro are not identical in direction; wherein the second kind of inertial sensor comprises a first accelerometer measuring an acceleration; and a second accelerometer measuring an acceleration wherein said first accelerometer and said second accelerometer are not identical in direction; and a system processor processing said measurements of said first one-axis gyro, said second one-axis gyro, said first accelerometer, and said second accelerometer for determining an azimuth and attitude where said system is located through gyro-compassing processing based on measurement of the earth's angular rate and gravity for obtaining the true north of a carrier of said system without magnetic interference and GPS signal jamming.