HAI PolWise, Employment of the HAI-TDLAS Hygrometer for the POLSTRACC and WISE missions on HALO

HAI PolWise，在 HALO 上的 POLSTRACC 和 WISE 任务中使用 HAI-TDLAS 湿度计

• 批准号: 316868214
• 负责人: Professor Dr. Volker Ebert
• 金额: --
• 依托单位: Physikalisch-Technische Bundesanstalt (PTB)
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/316868214?language=en
• 关键词: HAI; PolWise; Employment; TDLAS; Hygrometer

The new multi-phase TDLAS hygrometer HAI has successfully demonstrated its unique capabilities over the past 4 years in many science missions (TACTS/ESMVAL/ML-CIRRUS/ACRIDICON), instrument intercomparisons and stringent metrological validations. During ML-Cirrus HAI demonstrated the first simultaneous airborne detection of total (ice + gas) and gas-phase water with a single instrument and a unique temporal resolution of over 120 Hz. In ACRIDICON-CHUVA HAI realized, in a new configuration, synchronous open- and closed-path gas-phase detection with improved gas exchange times, e.g. to study sampling artefacts. Up to day, HAI has an excellent, almost 100% reliability with more than 300 flight hours and more than 300.000 flight kilometers. In parallel HAI was stringently validated at the primary German water standards at PTB and compared to the most important airborne hygrometers in the Aquavit-II campaign. This ensures a well-defined absolute accuracy and creates an unprecedented link between Metrology and Meteorology, connecting all airborne campaigns, Aquavit-II and the international water vapor scale to each other. The current proposal will enable participation in the upcoming POLSTRACC and WISE missions, which require highly accurate and spatially highly resolved gas phase water detection and measurement of the core flight parameter relative humidity. The project also aims at further improvements of the HAI instrument, in particular faster evaluation algorithms. Currently HAI can be seen as a core instrument for in-situ measurements on HALO, as many essential scientific topics are directly linked a better understanding of the dynamics and spatial distribution of water vapor in the UTLS. HAI is the only instrument which can provide a spatial resolution down to 30 cm at 800 km/h cruising speed which allows a variety of new studies to be realized.

新型多相TDLAS湿度计HAI在过去的4年中成功地在许多科学任务（TDLAS/ESMVAL/ML-CIRRUS/ACRIDICON）、仪器比对和严格的重复验证中展示了其独特的能力。在ML-Cirrus期间，HAI展示了第一个用单一仪器和超过120 Hz的独特时间分辨率同时对总（冰+气体）和气相水进行空中探测。在ACRIDICON-CHUVA HAI中，以新的配置实现了同步开放和闭合路径气相检测，改善了气体交换时间，例如研究采样伪影。到目前为止，HAI具有出色的，几乎100%的可靠性，飞行时间超过300小时，飞行公里数超过300，000。与此同时，HAI在PTB的主要德国水标准下进行了严格验证，并与Aquavit-II活动中最重要的空气湿度计进行了比较。这确保了定义明确的绝对精度，并在计量和气象之间建立了前所未有的联系，将所有机载活动，Aquavit-II和国际水蒸气尺度相互连接起来。目前的建议将使人们能够参与即将进行的POLSTRACC和WISE飞行任务，这两项任务需要高度准确和空间分辨率高的气相水探测和核心飞行参数相对湿度的测量。该项目还旨在进一步改进HAI仪器，特别是更快的评估算法。目前，HAI可以被视为HALO现场测量的核心仪器，因为许多重要的科学课题与更好地了解UTLS中水汽的动态和空间分布直接相关。HAI是唯一能够在800公里/小时巡航速度下提供低至30厘米的空间分辨率的仪器，这使得能够实现各种新的研究。