探测的概率和多传感器持久性从巧合的空中和卫星观测甲排放
Alana K Ayasse1, Daniel H Cusworth1, Katherine Howell1
1Carbon Mapper Inc., Pasadena, California 91101, United States.
Environmental science & technology
|November 26, 2024
概括
卫星甲检测正在得到改进. 通过结合空中和卫星数据,科学家可以更好地量化排放,并了解EMIT等仪器的检测极限,提高全球甲监测的准确性.
科学领域:
- 地球和大气科学 地球和大气科学
- 环境监测环境监测环境监测
- 遥感技术是远程传感技术.
背景情况:
- 卫星对于甲的检测和量化越来越重要.
- 越来越多的卫星仪器提供甲点源量化能力.
- 整合来自不同传感器平台的数据对于了解排放趋势和不确定性至关重要.
研究的目的:
- 为了确定和验证NASA EMIT卫星的检测极限.
- 开发和测试一个多传感器持久性框架,使用巧合的空中和卫星观测.
- 以概率推断是否真正没有未检测到的排放,并评估排放间歇性.
主要方法:
- 来自全球空中天文台 (GAO) 的定时甲探测空中调查与NASA EMIT的观测重叠.
- 卫星仪器的检测概率 (POD) 的表征.
- 开发和验证贝叶斯模型来推断排放的存在和间歇性.
主要成果:
- 在有利条件下,EMIT的90%检测概率 (POD) 确定为1060 (在3的门下).
- 一个贝叶斯模型被推导出,以概率推断未检测到的排放的状态.
- 该研究表明,在验证卫星探测极限和评估排放间歇性时,空中和卫星数据的一致性是有用的.
结论:
- 对于有效的多传感器数据融合,在不同传感器上准确地描述POD是必不可少的.
- 如果POD没有得到适当的考虑,可能会导致低估排放率,特别是在多传感器框架中.
- 开发的框架通过整合不同的观测数据,提高了甲排放量量的可靠性.
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