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Sensors 2018, 18(1), 247; doi:10.3390/s18010247

Research on Geometric Calibration of Spaceborne Linear Array Whiskbroom Camera

1
College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2
University School of Environmental Science, Nanjing Xiaozhuang University, Nanjing 211171, China
*
Author to whom correspondence should be addressed.
Received: 31 October 2017 / Revised: 6 December 2017 / Accepted: 13 January 2018 / Published: 16 January 2018
(This article belongs to the Special Issue Charge-Coupled Device (CCD) Sensors)
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Abstract

The geometric calibration of a spaceborne thermal-infrared camera with a high spatial resolution and wide coverage can set benchmarks for providing an accurate geographical coordinate for the retrieval of land surface temperature. The practice of using linear array whiskbroom Charge-Coupled Device (CCD) arrays to image the Earth can help get thermal-infrared images of a large breadth with high spatial resolutions. Focusing on the whiskbroom characteristics of equal time intervals and unequal angles, the present study proposes a spaceborne linear-array-scanning imaging geometric model, whilst calibrating temporal system parameters and whiskbroom angle parameters. With the help of the YG-14—China’s first satellite equipped with thermal-infrared cameras of high spatial resolution—China’s Anyang Imaging and Taiyuan Imaging are used to conduct an experiment of geometric calibration and a verification test, respectively. Results have shown that the plane positioning accuracy without ground control points (GCPs) is better than 30 pixels and the plane positioning accuracy with GCPs is better than 1 pixel. View Full-Text
Keywords: thermal-infrared camera; spaceborne linear array whiskbroom; imaging geometric model; geometric calibration thermal-infrared camera; spaceborne linear array whiskbroom; imaging geometric model; geometric calibration
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Sheng, Q.; Wang, Q.; Xiao, H.; Wang, Q. Research on Geometric Calibration of Spaceborne Linear Array Whiskbroom Camera. Sensors 2018, 18, 247.

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