提出采用＂自适应换站＂法来解决单基线处理模式难以满足长距离动态定位的问题。该方法的主要思想是：整个解算过程始终保持单基线的动态定位模式,当发现流动站与原参考站间的距离大于流动站与其他参考站间的距离时,自动更换周围最近的参考站作为新参考站;对换站前后的数据设置一定时间的重叠段,利用等价消参法将换站前后的数据进行严格的自适应融合,以保持整个解算过程的连续性。通过对实测机载数据的解算,证明该方法不仅可以克服因载体飞行距离过远而导致的定位精度下降,而且能够避免因换站所引起的前后解的不连续,计算结果表明该方法的定位%A method of adaptively changing reference station is developed to make the single baseline model suitable for the long range airborne positioning.The basic idea is that the reference station will be automatically replaced by the nearest one,when the distance between kinematic station and original reference station is longer than the maximum distance decided by the software.The method of equivalently eliminating parameters is used to combine the observation data between new and original reference stations.To verify the validation of this method,GPS data of airborne campaign AlpinAero2008 is used.The results show that the proposed method can provide a more stable and consistent solution of kinematic positioning with about 2 cm precision level compared with those of the network solution.
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