An Instantaneous Ambiguity Resolution Method for Kinematic Deformation Surveying Using GPS

Ambiguity resolution(AR) instantaneously is a significant way to improve the continuity and reliability for GPS kinematic deformation surveying system,and the AR is easier for longer wavelength.We propose a new method for AR in double-differenced level using a single epoch of data.Two combined signals with longer wavelength,φ-3,4 and φ4,-5,are used in this method.Based on the constraints of priori coordinates and the relation between the dual frequency,AR instantaneously is achieved.A robust adaptive Kalman filter is used for ensure the reliability of AR and the accuracy of position.The tolerance of position error for priori coordinate is exceeded to 50 cm and suit for kinematic deformation surveying.