Presentation Details
Quality assessment of GF-2 and SuperView-1 data for marine remote sensing applications based on Sentinel-2
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Updated Time：2024-10-14 15:03:10 Hits：847
Poster Presentation
Start Time：2025-01-16 19:35（Asia/Shanghai）
Duration：15min
Session：S54 Session 54-Remote Sensing of Coastal Zone and Sustainable Development »
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Abstract
The GF-2 and SuperView-1 satellites, launched by China in 2014 and 2016, offer spatial resolutions of 4 m and 2 m in visible and near-infrared bands. While widely applied across various fields, their suitability for oceanographic research has not been thoroughly assessed. In this study, we use data from Sentinel-2, known for its high calibration accuracy and advanced technical capabilities, as a reference to evaluate the performance of GF-2 and SuperView-1. We calculated the signal-to-noise ratio (SNR) for the GF-2, SuperView-1, and Sentinel-2 sensors to preliminarily assess their data quality. We also conducted cross-comparisons of top-of-atmosphere (TOA) reflectance among these sensors. The results demonstrate that the SNR of both Chinese satellites, GF-2 and SuperView-1, meets the requirements of water quality monitoring in the visible spectrum. Additionally, GF-2 showed a higher concordance with Sentinel-2' s TOA reflectance compared to SuperView-1. After applying a linear correction, TOA data from both Chinese sensors aligned more closely with Sentinel-2, effectively reducing systematic biases in the visible bands. This harmonization is crucial for improving the interoperability and comparability of multi-source satellite data. Recognizing the remaining discrepancies between GF-2, SuperView-1, and Sentinel-2, we emphasize the need for data transformations when utilizing GF-2 and SuperView-1 in comparative oceanographic studies. This study improves the accuracy of Chinese high-resolution sensors data and lays a foundation for advancing the use of Chinese satellite data in marine ecosystems.
Keywords
GF-2; SuperView-1; Sentinel-2; signal-to-noise ratio (SNR); top-of-atmosphere (TOA) reflectance
Speaker
Yifan Xu
Master Jimei UniversitySubmission Author
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Important Date
-
Conference Date
Jan 13
2025
toJan 17
2025
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Sep 27 2024
Draft paper submission deadline
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Feb 17 2025
Registration deadline
Sponsored By
State Key Laboratory of Marine Environmental Science, Xiamen University
Organized By
State Key Laboratory of Marine Environmental Science, Xiamen University
Department of Earth Sciences, National Natural Science Foundation of China
Department of Earth Sciences, National Natural Science Foundation of China
Contact Information
- Kejing GU
- xm******@xmu.edu.cn
- +86*********
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