This paper describes the development of a low-cost and small size integrate
d Global Positioning System (GPS)/inertial measurement unit (IMU), The deve
loped strapdown Attitude and Heading Reference System (AHRS) is capable of
providing attitude and heading accuracy at +/-0.2 and +/-0.4 degrees, respe
ctively, The prototype of low-cost integrated GPS/IMU can give positioning
accuracy of 10 metres.