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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 delay of the ionosphere and the delay of the troposphere, the system error has the characteristic of decreasing the correlation with the increase of the distance between stations. It is very difficult to obtain the accurate integer carrier phase integer ambiguity quickly and accurately under long distance conditions. Therefore, this paper presents a fast solution method for the ambiguities of double-difference integer in long-distance network RTK base stations. The method uses the MW combined observations to calculate the integer ambiguity of double-difference wide-lane, Value to determine the ambiguity of the ambiguity of the double-difference carrier phase between the reference stations, and without linearization, no equations need to be solved and the ambiguities of the two-difference integral are independent each other. At last, the algorithm is validated by the measured data, which proves that this method can quickly and reliably solve the double-difference integer ambiguity between long-distance reference stations.