航天线阵CCD传感器内方位建模与优化

The Inner Orientation Modeling and Optimization of Space Line-array CCD Sensor

线阵CCD传感器在航天摄影测量中已获得了广泛的应用,但卫星发射上天后由于多种因素,CCD、镜头的各项参数均发生了变化,原来实验室里标定的值将不再适用。此时卫星影像定位必须顾及像点的实际偏差,否则将对定位精度产生很大的影响。本文详细分析了造成这些偏差的因素,构建了合适的内方位模型,然后以HRS影像为例对模型中的参数进行了解算并作了优化。试验表明,本文所建立的内方位模型是合理的。

Line-array CCD sensors have a widespread application in space photogrammetry.But the parameters of CCD and mirror have changed because of multiple factors after the satellite launching into the space.The calibration value in the laboratory will be no longer suitable.Now the localization of satellite image must take into account the actual deviation of the image points,otherwise it will have very tremendous influence to the pointing accuracy.This article analyses the factors which caused these deviation,constructs the appropriate inner orientation model,then resolves and optimizes these parameters taking HRS image as the example.