NightHawk:一个低成本的夜间照明野火观测平台及其放射性校准
Chase A Fuller1, Steve Tammes2, Philip Kaaret1,3
1Department of Physics & Astronomy, The University of Iowa, Iowa City, IA 52242, USA.
Sensors (Basel, Switzerland)
|April 12, 2025
概括
我们开发了一种低成本的遥感系统,使用可见和近红外 (VIS-NIR) 摄像头从空中夜间光线观测中检测自然火线. 这项技术有助于监测人口密地区附近的野火.
科学领域:
- 遥感 遥感 遥感 遥感
- 光学工程是指光学工程.
- 野火监测 野火监测 在野火监测
背景情况:
- 精确检测自然燃烧火线对于有效监测野火至关重要,特别是在人口密地区附近.
- 现有的夜间光 (NTL) 观测通常缺乏特异性,无法将燃烧的生物质与其他光源区分开来.
- 可见和近红外 (VIS-NIR) 光谱学为区分火灾特征提供了潜力.
研究的目的:
- 介绍一个低成本的VIS-NIR遥感平台的原型,用于检测和描述自然燃烧的火线.
- 优化平台用于空中夜间光 (NTL) 观测.
- 执行开发系统的放射性校准.
主要方法:
- 使用商用CMOS传感器摄像头和过器,带宽为100nm.
- 选择过器利用770nm附近的强排放线,这是自然燃烧的特征.
- 针对特定曝光时间 (20毫秒和2毫秒) 进行校准的摄像头,以实现高灵敏度和广泛的动态范围.
主要成果:
- 实现了放射测量测量,灵敏度底部为3-5 × 10-6 W m-2 sr-1 nm-1 和不确定性<5%.
- 证明了3000-4000的动态范围,扩大了10的因数,暴露时间更短.
- 成功捕获了来自燃烧生物质的空间分辨火线的空中图像.
结论:
- 开发的低成本VIS-NIR遥感平台有效地使用NTL观测来检测和描述自然燃烧的火线.
- 该系统根据排放区分火灾特征的能力对于在人口密地区附近的野火监测至关重要.
- 校准的平台提供了灵敏而准确的辐射测量,适用于空中野火检测应用.
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