Gps Absolute Positioning And Related Technologies

In this paper,We study that how to estimate the coordinate of currenly epoch using the observation preferably in the dynamic navigation.We study the mathematical models and methods for cleaning data in absolute positioning. And,We also studied the ionosphere model correction, the troposphere model correction and the rotation of the earth model correction. From studying,we improve the methods which smoothing pseudoranges in using phase.We write the program which used for fighting errors in absolute positioning.We also write the program which used for linear combinating in absolute positioning .From analyzing for the measurement of outer,we can conclude that we can use M estimation to estimate parameter in GPS absolute positioning.lt has application value.Using it,We can obstain the stable positioning result and remove the outer.In this Paper ,We calculate the data which from the baseline space of the GPS calibration space .We also draw some conclusion using broadcast ephemeredes and smoothing pseudoranges.The Positionging precision is in 1-2 meter.