Design Of Three-dimension Digital Compass And Its Application In Attitude Determination Of GPS

The wild mapping terminal of IHF internal and external integrated system is an embedded working platform that integrates the functions of GPS position,wireless data transmission,image acquisition and laser ranging.The wild mapping terminal is closely related in the application of photogrammetry,target location calculating,GPS position and ranging of the coordinate and the precision of the tridimensional gesture.The thesis is based on the requirements of the IHF system about the precision of the tridimensional gesture parameter,then designs a three-dimension digital compass which used the STM32F4 as its CPU with the application of KXR tri-axis accelerometer,PNI tri-axis magneto-inductive sensor.And then uses the methods of median filtering and Kalman filter algorithm to optimize the measure property in the software and by using electronic theodolite to practice it.Finally,it reaches the precise measure of 0.3 °on the azimuth and 0.2°on the roll angle elevation.The thesis also introduces the theory of GPS carrier phase attitude determination based on the technology of carrier phase differential GPS and has done further analysis about the precise of the satellite's coordinate with different sampling interval and different rank of Lagrange interpolation.Then it also gives a brief introduction about the general model of the GPS'single-difference,double-difference as well as triple-difference and discusses the process of getting the solution of double-difference ambiguity.Besides,it puts forward the grid search method of single-difference ambiguity based on attitude angle and baseline by the means of least square search(LSS)and pyramid algorithm...