长距离网络RTK基准站间整周模糊度的快速解算

An algorithm of instantaneous double difference ambiguity resolution for long-range reference stations of network RTK

由于电离层延迟、对流层延迟等系统误差具有随测站间距离增加而相关性降低的特性,长距离情况下准确快速得到载波相位整周模糊度十分困难。因此文章提出了一种长距离网络RTK基准站间双差整周模糊度的快速解算方法,该方法利用M-W组合观测值进行双差宽巷整周模糊度的计算,结合无电离层组合观测值进行基准站间双差载波相位整周模糊度的确定,且不需线性化、不需解求方程组,各双差整周模糊度之间相互独立。最后通过实测数据进行算法验证,证明了该方法能够快速、可靠地解算长距离基准站间的双差整周模糊度。

Due to the systematic errors of ionospheric delay,tropospheric delay and so on,the correlation of long-range network RTK（generally 100km-200km）will be reduced with the increase of distance between reference stations.It is very difficult to determine the carrier phase integer ambiguities accurately and rapidly for long-range reference stations.So the algorithm of instantaneous double difference ambiguities resolution for long-range reference stations of network RTK was proposed in this paper.Firstly,the double difference wide-lane integer ambiguities were determined by M-W combinations.Then the carrier phase integer ambiguities were determined by ionosphere-free combinations between reference stations.It does not need linearization and corresponding observational equation resolution,and the double difference integer ambiguities could be mutually independent.The algorithm was evaluated by test data.The results indicated that this algorithm could provide reliable double difference integer ambiguities very quickly and accurately for long-range reference stations.