空间测角网三维平差

空间测角网三维平差,就是根据观测的水平方向值和垂直角计算出各方向间不受坐标系约束的空间角,将由空间角组成的空间测角网纳入参心空间直角坐标系中进行平差,求得待定点的参心空间直角坐标、大地经纬度、高斯坐标和高程。这样,既可克服需将测站坐标系和参心空间直角坐标系相联系而进行天文观测的弊端,又可使平差值免受垂线偏差的影响,从而开拓了三维平差的应用前景。

THREE-DIMENSIONAL ADJUSTMENT OF THE SPACE GONIOMETRIC NETWORK

The three-dimensional adjustment of the space goniometric network is the space angles calculated in the light of the horizontal direction value and the vertical angles. They are unrestreined by the coordinate system among the space qoniometric networks composed of the different directions. The space angles were brought into the reference-topocentric Cartesian to adjust, thus obtaining the coordinates, the geodetic longitude and latitude, the Gauss coordinates, and the altitude of the unknown point. So we can not only overcome the shortcomings of the astronomical observations which needed to connect the coordinates of the observation station and the topocentric Cartesian,but also make the adjusted values avoid the influence of the plumb-line deviation. Thus, it is opening up an application vista for the three-dimensional adjustustment.