06459990 is referenced by 72 patents.

A positioning method and system for water and land vehicles is disclosed for highly accurate and self-contained operation. In which, an inertial navigation system (INS) is built on the micro MEMS (MicroElectroMechanicalSystem) IMU that is the core of the position determination system. To compensate the error of the INS, multiple navigation sensors are integrated into the system. The magnetic sensor is used as a magnetic field sensor to measure the heading of the vehicle. The odometer is used to measure the distance when the vehicle is on land. An automated Zero velocity updating method is used to calibrate the ever increasing INS errors. When the vehicle is in the water, a velocimeter is used to measure water speed for the INS aiding.

Title
Self-contained positioning method and system thereof for water and land vehicles
Application Number
9/669185
Publication Number
6459990 (B1)
Application Date
September 25, 2000
Publication Date
October 1, 2002
Inventor
Ching Fang Lin
Simi Valley
CA, US
Hiram McCall
Simi Valley
CA, US
Agent
David and Raymond Patent Group
US
Agent
Raymond Y Chan
US
Assignee
American GNC Corporation
CA, US
IPC
G06F 15/50
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