加入边长的严密GPS网平差模型

本文根据空间坐标转换的推导过程,以GPS基线及空间测距边长为观测值,以当地高斯平面坐标、大地高、缩放系数、旋转角、测距常数和比例系数为平差参数,构造加入测距边长的严密GPS网平差模型。将测距边长观测值加入到平差模型中有效地利用了地面观测数据,增加了多余观测方程,提高了解算精度,还可以解得测距观测值的测距常数和测距比例系数,其中采用数值导数的方法,简化了GPS网平差的计算,通过对实测数据的处理和比较。表明了该模型是正确的,并且在精度方面也得到了改善。

An additional-range and precise GPS network adjustment method

Based on the deducing process of coordinate transformation,with GPS base lines and the ranges as observations,and with gauss plane coordinates,geodetic heights,zooming coefficients,Rotation angles,range constants,scaling coefficients as adjustment parameters,a precise GPS nework adjustment is constructed in this paper.By adding the additional range observations to the model,we can make most use of the ground observations to increase the equations and improve the precision.Furthermore,we can obtain the range constants,scale coefficients.During the process,the numerical partial derivative is introduced to simplify the calculation of the partial differential coefficient.The model is verified with real observed data.