Evaluation and Analysis of Geometric Accuracy of the ZY-1 02D VNIC Image

Abstract

AbstractThe ZY-1 02D reached orbit in September 12, 2019. It is equipped with a 9-band visible near-infrared camera (VNIC) and a 166-band hyperspectral camera. The VNIC can acquire a panchromatic/multi-spectral image with a spatial resolution of 2.5/10 m and a width of 115 km. The geometric accuracy of ZY-1 02D VNIC is evaluated using multiple revisited data in Northeast and Northwest China. Based on the ground control points (GCPs) extracted from the ZY-3 standard stereo triplet products, the accuracy of the bundle block adjustment with the affine correction in image space is analyzed, and the root mean square error (RMSE) of the panchromatic image is better than 0.5 pixel in most cases. However, through the static and dynamic residual analysis of GCP, it is found that the vibration of the satellite platform will cause significant dynamic imaging errors, especially in the push-broom direction along the orbit, an effect of approximately 1.0 pixels in size can be detected. In general, the panchromatic images of ZY-1 02D VNIC have good geometric accuracy and meet the requirements of design specifications. However, the accuracy of panchromatic image is adversely affected by platform vibration.KeywordsZY-1 02DVNICGeometric accuracyVibrationAnalysis