On the basis of establishing direct geo-positioning model for three-line array sensor ADS40/80 images, in order to optimize the positioning accuracy, the self-calibration technology was used to update the ADS40/80 sensor imaging parameters. Moreover, the ADS40/80 camera error model and self-calibration bundle adjustment model were set up. Multi-groups of ADS40 data over the Songshan experimental field were used for direct geo-positioning and parameter updating experiments. Experimental results proved that the self-calibration adjustment technique can effectively update sensor imaging parameters and significantly improve image direct positioning accuracy.
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