@article{XIE2021, 
author = {Junfeng XIE and Ren LIU and Yongkang MEI and Wei LIU and Jianping PAN},
title = {Preliminary Pointing Bias Calibration of ZY3-03 Laser Altimeter},
year = {2021},
journal = {Journal of Geodesy and Geoinformation Science},
volume = {4},
number = {3},
pages = {91-100},
keywords = {ZiYuan3-03 satellite, spaceborne laser altimeter, terrain matching, geometric calibration, accuracy assessment},
url = {https://www.sciopen.com/article/10.11947/j.JGGS.2021.0308},
doi = {10.11947/j.JGGS.2021.0308},
abstract = {ZiYuan3-03 (ZY3-03) satellite was launched on July 25, 2020, equipped with China’s second-generation laser altimeter for earth observation. In order to preliminarily evaluate the in-orbit performance of the ZY3-03 laser altimeter, the pointing bias calibration based on terrain matching method was adopted. Three tracks of laser data were employed for the ZY3-03 laser altimeter calibration test. Three groups of pointing parameters were obtained respectively, and the mean value of pointing is considered as the optimal calibration result. After calibration, ZY3-03 laser pointing accuracy is greatly improved by the method, and its pointing accuracy is approximately 12.7 arcsec. The first-track laser data on the Black Sea surface is used to evaluate the relative elevation accuracy of ZY3-03 laser altimeter after pointing bias calibration, which is improved from 0.33m to 0.19m after calibration. Meanwhile, the absolute elevation accuracy of ZY3-03 laser altimeter after pointing bias calibration is evaluated by the Ground Control Points (GCPs) measured by RTK (Real-Time Kinematic), which is better than 0.5m in the flat terrain.}
}