在热带沿海地区评估ACOLITE大气校正算法
Optics express
|December 19, 2025
概括
在一个热带沿海地点,ACOLITE大气校正算法在从Landsat和Sentinel-2卫星数据中导出遥感反射率 (Rrs) 中显示出可靠的性能. 在现场测量验证证实ACOLITE的存在.
科学领域:
- 海洋光学和远程传感
- 大气校正算法的大气校正算法
- 卫星数据验证验证
背景情况:
- 精确的大气校正对于从卫星图像中获得有意义的水质参数至关重要.
- ACOLITE算法被广泛用于处理沿海和海洋图像.
- 用现场数据验证ACOLITE的性能对于确保数据可靠性至关重要.
研究的目的:
- 为了评估ACOLITE (版本20231023.0) 大气校正算法的性能.
- 为了评估ACOLITE衍生远程传感反射率 (Rrs),在热带沿海地点使用现场放射测量.
- 在不同的卫星传感器 (Landsat-8, -9, Sentinel-2A, -2B) 和验证数据集 (AERONET-OC, HyperOCR) 中比较ACOLITE的准确性.
主要方法:
- 利用了来自AERONET-OC和海鸟科学HyperOCR仪器的现场放射数据.
- 将ACOLITE衍生的Rrs与Landsat-8, -9,Sentinel-2A和-2B卫星观测的地面测量进行了比较.
- 分析了基于总体协议 (r2,RMSE,MBE,MAPE),传感器通道,卫星平台和验证数据集的算法性能.
主要成果:
- 在卫星和地面测量之间,ACOLITE显示出了优异的总体一致性 (r2 > 0.8).
- 该算法在绿色带 (560 nm) 的表现最好,在沿海气溶带 (443 nm) 的表现较差.
- 与AERONET-OC.相比,当与HyperOCR数据进行验证时,卫星检索显示出更好的协议.
结论:
- ACOLITE为热带沿海水域提供可靠和准确的遥感反射率 (Rrs).
- 传感器通道和验证数据集之间的性能变化凸显了需要仔细解释数据的必要性.
- 该研究证实ACOLITE适用于沿海环境中的大气校正,并考虑了特定的频段性能.
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