Patent ID: 7987049
Filing Date: 2011-07-26
Classification: G01C,G01S

Abstract:
1. A GPS-based attitude determination system (GPS-based ADS) for determining attitude and heading of a moving body by integrated use of the Global Positioning System(GPS) and an inertial navigation system, said GPS-Based ADS comprising: a GPS receiver for receiving GPS signals; an inertial sensor for determining at least one of angular velocity and acceleration of the moving body; an integration filter for producing a navigation solution by integrating an output of said GPS receiver and an output of said inertial sensor; a blockage area calculator for defining a GPS signal blockage area in which any GPS signal is lost based on the output of said GPS receiver; a sensor anomaly detector for detecting an anomaly of an inertial sensor signal fed from said inertial sensor; and a monitor for presenting information to be used for identifying a cause of an operational failure of said GPS-Based ADS based on information obtained from said blockage area calculator and said sensor anomaly detector.