三线阵机载传感器ADS40系统误差补偿方法探讨

Method of systematic error compensation of three linear array airborne sensorsADS40

ADS40最大的优点是可以进行直接定向和集成传感器定向,但是精度通常达不到大比例尺制图的要求。直接定向和集成定向的精度受系统误差影响,主要包括:①内定向带来的误差;②POS归算参数的误差;③局部坐标系带来的误差。本文介绍了ADS40的主要系统误差源,提出了一个用于补偿各种系统误差的实验方案,并对空三得到的数据精度指标进行比较,实验结果反映了各项系统误差对数据精度的影响,说明了系统误差补偿的必要性。

The biggest advantage of ADS40 is to enable the direct and integrated sensor orientation, however the accuracy is normally unable to reach the requirements of the large scale surveying and mapping. The accuracy of direct and integrated sensor orientation is mainly affected by various systematic errors, including the error caused by interior orientation, by naturalization calculation parameters from POS data to exterior orientation elements, and by local coordinate system. In the paper, the main systematic errors were introduced, and the project of compensating the different systematic errors was proposed, then a comparison between data accuracy index derived from aerial triangulation was carried out. Through the result, the influence of the systematic errors on the data accuracy was clearly shown, and the necessity of the systematic error compensation was well indicated.