基于PCI-GXL系统对多源遥感影像区域网纠正精度的研究

The Research of the Accuracy Base on PCI- GXL System of Multi- source Remote Sensing Images Block Adjustment

基于PCI-GXL软件平台,针对多源多时相的遥感影像进行区域网纠正,利用控制点数量位置的变化,研究区域网精度的变化情况,同时,利用PCI-GXL软件的内部精准算法,使用遥感影像的高精度RPC参数恢复卫星影像的空间姿态,检验区域网内的连接点对整个区域网的稳定和定位精度起到的作用。本文针对连接点的变化进行了试验分析,在整个区域网中去掉高定位精度的遥感影像,查看整个区域网的精度变化。通过对实验数据精度的分析评价,进一步验证了PCI-GXL系统在区域网纠正时,可以充分地利用高定位精度影像连接点的控制作用,提高整个区域网的精度。今后在遥感影像的区域网纠正时,可以充分的利用已有的影像源作为控制来源,减少外业控制点的需求,避免过多外业控制点的实测工作,提高了遥感影像生产的高效性。

Nowadays we can obtain multi - source remote sensing images, so when we do the block adjustment use control point, we should know how many control point we need to achieve our accuracy demand. The article introduce the research base on PCI -GXL system of multi - source remote sensing images block adjustment, use RPC parameters, change the number and distribution of the control points, analysis the RMS data, we can conclude how the control point change can achieve accuracy demand, And change the combine of the different source images; we research the relationship of the accuracy and connection points. In the later survey and mapping production, we use the connection points replace the control points, so we can reduce the cost of the production of control points in the outfield, it is important for ours.