Low cost inertial measuring unit

A concept being explored is the use of an inexpensive IMU (inertial measuring unit) with the GPS (Global Positioning System). An inexpensive IMU can meet many of the same functional requirements as the high-accuracy system, with the exception of long-term position. For example, some applications for instrumenting a reference frame are antenna stability, satellite acquisition (including GPS), platform stability, flight stabilization, and heading information. The acceleration data could still be integrated to find velocity and position; however, this position information would only be used for a period of minutes. For example, to provide continuous navigation during a GPS blockage due to buildings, wing blockage during a maneuver, etc. The author presents the capabilities of a unit of this type which was developed for the US Army