精确度 多普勒转移测量使用频率校准的激光异质辐射计
Optics letters
|October 13, 2023
概括
精确的二氧化碳 (CO2) 大气光谱检测是使用一个用光学频率校准的激光异极放射仪 (LHR) 实现的. 这种方法精确地追踪风引起的多普勒转移,从而实现高精度的大气速度测量.
科学领域:
- 大气科学 大气科学
- 频谱学是一种光谱学.
- 计量学 计量学是一门学科.
背景情况:
- 对二氧化碳 (CO2) 等大气气体的准确测量对于气候监测至关重要.
- 激光异质放射测量 (LHR) 为大气分析提供高光谱分辨率.
- 光学频率子为光谱仪器提供了前所未有的校准精度.
研究的目的:
- 为了证明二氧化碳的精确大气光谱,使用频率校准的LHR.
- 研究和量化大气二氧化碳光谱中由风引起的多普勒转移.
- 确定该技术在高精度大气速度测量的潜力.
主要方法:
- 使用了用光学频率进行校准的激光异质辐射计 (LHR).
- 使用太阳光作为光源,记录了大气中的CO2光谱在1572.33nm附近.
- 分析了光谱频率变化,以确定来自风的多普勒效应.
主要成果:
- 测量的二氧化碳光谱在5小时内显示了大约11 MHz的频率变化,这归因于风引起的多普勒效应.
- 证明了风引起的多普勒位移的跟踪,单次测量的相对频率精度为2 MHz (3 m/s),改进到100 kHz (15 cm/s),平均值.
- 取得了几部分的分数精度在10^10.
结论:
- 频校准的LHR可实现高精度的大气速度测量.
- 这种技术对气候科学和天文学领域的应用非常有希望.
- 该研究验证了先进的光谱方法用于详细的大气表征的使用.
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