植物树冠反射传感器的开发及其在晴朗天空条件下的白天适用性
Naisen Liu1,2,3, Jingyu Guo1, Fuxia Liu1,2,3
1Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection, Huaiyin Normal University, Huai'an, China.
Frontiers in plant science
|January 24, 2025
概括
开发了一种新的便携式植被树冠反射传感器,用于精确的现场测量. 该工具增强了植被监测,以改善农业,草原和森林管理.
科学领域:
- 农业遥感 农业遥感
- 植物科学 植物科学
- 传感器技术 传感器技术
背景情况:
- 光谱反射对于监测植被健康和生长至关重要.
- 准确的现场测量对于有效的农业,林业和草原管理至关重要.
- 现有的方法可能缺乏可移植性或连续运行能力.
研究的目的:
- 开发一个小型,便携式的植被树冠反射率 (VCR) 传感器,用于全天运行.
- 通过严格的校准和验证,确保传感器的准确性和可靠性.
- 为了评估传感器在现实场景条件下的性能,与既有仪器相比.
主要方法:
- 开发了一种便携式视频录像机传感器,具有两种光学波段 (710 nm和870 nm) 和28°视野.
- 使用集成球来校准传感器,并实施太阳高度校正模型.
- 使用标准反射灰度表验证了传感器的准确性,并用分析光谱设备 (ASD) 光谱辐射计比较了场测量.
主要成果:
- 传感器在710nm和870nm时表现出高精度的低根平均平方误差 (RMSE) 和平均绝对误差 (MAE).
- 现场测量显示,录像机传感器和ASD光谱辐射计之间的距离非常接近.
- 太阳高度校正显著降低了百慕大草的日内反射率变化和变化系数 (CV).
结论:
- 开发的便携式视频录像机传感器是实地植被树冠反射率监测的基本工具.
- 传感器的准确性和太阳高度校正的有效性得到了验证.
- 这项技术支持高质量的农业,草原和森林管理实践的进步.
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