附有约束条件的整周模糊度解算

载波相位测量的相对精度目前可以达毫米级，其周期性造成了模糊度无法确知，必须对其进行解算。传统的模糊度解算方法精度虽然较高但耗时，无法满足实时动态定位；附有几何约束算法的定位速度虽然较高，但由于基线先验信息的误差导致可靠性不高。提出了一种模糊度的解算方法，通过对基线向量的约束提高模糊度解算速度，该算法即使在先验信息出现一定误差的情况下，依然能较准确地估算模糊度，从而保证模糊度解算结果的可靠性。仿真结果表明：该算法能有效地提高整周模糊度解算效率，并且具有一定的容错力，适合于动态定位。

Integer ambiguity calculation with constraint condition

The relative precision of carrier phase measurement can reach millimeter, but its periodicity causes the uncer-tainty 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 posi-tioning speed, but due to the error of baseline apriori information, it is less reliable. Accordingly, a new ambiguity calculat-ing 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.