• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric Measurement Techniques >Absolute, pressure-dependent validation of a calibration-free, airborne laser hygrometer transfer standard (SEALDH-II) from 5 to 1200?ppmv using a metrological humidity generator
【24h】

Absolute, pressure-dependent validation of a calibration-free, airborne laser hygrometer transfer standard (SEALDH-II) from 5 to 1200?ppmv using a metrological humidity generator

机译：绝对，压力依赖性验证的无校准，空气传播湿度计转移标准（SeaLDH-II）使用测量湿度发生器的5至1200°PPMV

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Highly accurate water vapor measurements are indispensable for understanding a variety of scientific questions as well as industrial processes. While in metrology water vapor concentrations can be defined, generated, and measured with relative uncertainties in the single percentage range, field-deployable airborne instruments deviate even under quasistatic laboratory conditions up to 10–20?%. The novel SEALDH-II hygrometer, a calibration-free, tuneable diode laser spectrometer, bridges this gap by implementing a new holistic concept to achieve higher accuracy levels in the field. We present in this paper the absolute validation of SEALDH-II at a traceable humidity generator during 23?days of permanent operation at 15?different Hsub2/subO mole fraction levels between 5?and 1200?ppmv. At each mole fraction level, we studied the pressure dependence at six?different gas pressures between 65 and 950?hPa. Further, we describe the setup for this metrological validation, the challenges to overcome when assessing water vapor measurements on a high accuracy level, and the comparison results. With this validation, SEALDH-II is the first airborne, metrologically validated humidity transfer standard which links several scientific airborne and laboratory measurement campaigns to the international metrological water vapor scale.
机译：高精度的水蒸气测量对于了解各种科学问题以及工业过程是必不可少的。虽然在计量水蒸气浓度中可以通过单个百分比范围内的相对不确定性来定义，产生和测量，但是即使在Quasistatic实验室条件下偏离的现场 - 可部署的空气传播仪器也会偏离高达10-20？％。新型SeaLDH-II湿度计，无校准的可调调谐二极管激光光谱仪，通过实施新的整体概念来实现该领域的更高精度水平。我们本文介绍了在23℃的可追踪湿度发生器中的SeaLDH-II的绝对验证，在15？不同的H 2 o摩尔分数5？和1200？PPMV之间的耐久性操作。在每个摩尔分数水平上，我们研究了六个的压力依赖性在65到950℃之间的不同气体压力。此外，我们描述了这种计量验证的设置，在评估高精度水平的水蒸气测量时克服的挑战，以及比较结果。通过这种验证，SeaLDH-II是第一个空中验证的湿度转移标准，将几种科学空中和实验室测量活动联系起来的国际计量水蒸气量表。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号