To realize the high-precision geometric positioning of Jilin1-KF01A WF camera, a rigorous geometric model which is an ultra-multi-chip TDI CCD mechanical staggered push-broom imaging system was established, and the on-orbit geometric calibration based on the look-angle model was proposed and verified. This model had an added constraint of geometric positioning consistency of the nearby TDI CCD. The rigorous geometric model was realized using the principle of push-broom satellite imaging system. Then, by decomposing the calibration coefficients into calibration parameters of the interior orientation parameters and the exterior orientation model and combining the imaging characteristics of the large-width and ultra-multi-chip TDI CCD mechanical staggered push-broom imaging system, a step-by step iterative method with constraint of geometric positioning consistency of the nearby TDI CCD was adopted to solve the calibration coefficients. Finally, the on-orbit geometric calibration of Jilin1-KF01A WF camera was performed using the control data to identify the interior and exterior orientation parameters. Experimental results indicate that the proposed calibration model and method are reasonable and effective. The calibration precision of the interior orientation elements is better than 0.3 pixel, and the ultra-multi-chip TDI CCD mechanical staggered push-broom imaging system generates seamlessly stitched images. Moreover, the band-to-band registration accuracy is better than 0.3 pixel. Panchromatic image and the multi-spectral image had the same geometric positioning accuracy. The positioning accuracy without ground control points (GCPs) improves to 20 m (CE90) and the positioning accuracy with GCPs is better than 2 m, which satisfies the 1∶10 000 topographic maps requirements.
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