Airborne Three-Line-Scanner CCD Imagery Self-calibration Block Adjustment

The self-calibration block adjustment based on the additional parameters is applied to ADS40 imagery geometric positioning.Upon the detailed investigation on the imaging error properties of the three-line-scanner CCD sensor,the suitable self-calibration parameter model is built up.Then three types of exterior orientation parameter models and the self-calibration block adjustment model are set up.Finally the normal block adjustment test and the self-calibration block adjustment are carried out using the ADS40 data.Experimental results prove that the self-calibration block adjustment technique can efficiently compensate the system errors of ADS40 image and significantly enhance the positioning accuracy.