关键词: 整周模糊度, 基线向量, 全球定位系统（GPS）, 模糊度解算

Abstract: The relative precision of carrier phase measurement can reach millimeter, but its periodicity causes the uncertainty of its ambiguity, so it is necessary to calculate its ambiguity. The traditional calculating method is highly precise but time-consuming which can not satisfy dynamic positioning. The geometric constraint algorithm has relatively high positioning speed, but due to the error of baseline apriori information, it is less reliable. Accordingly, a new ambiguity calculating method is proposed in this paper, which can increase the calculating speed through the baseline vector constraints, and even with the error of apriori information, assure the reliability. Simulation results show the method can effectively increase the calculating efficiency, is fault-tolerant and is suitable for dynamic positioning.

Key words: integer ambiguity, baseline vector, Global Positioning System（GPS）, ambiguity calculation