GPS高程的抗差拟合推估

从一般的ＧＰＳＹ同程拟合法出发，论述了其存在的问题与解决的方法，ＧＰＳ高程抗差拟合推估法根据平差后的验后信息，逐步调整观测值（已知点）的权，使含有粗差的观测值的权越来越小甚至等于０，从而达到减低粗差对平差结果的影响，提高ＧＰＳ高程内插的精度，最后通过实例计算分析，说明这种方法的有效性。

Anti-error Fitting of GPS Height

The common fitting method of GPS height, the existing problems and resolving methods are discussed. The Anti error fitting of GPS height is a good method, which, according to the adjusted information, adjusts the weight of observations(the known points) and makes the weight with gross error of observations become smaller and smaller, even zero as a result, the influence on the result reduces greatly. The method can raise the precision of height interpolation.Finally the effectiveness is testified through a case study.