Quality assessment of an open-path tuneable diode laser spectrometer for water vapour measurement and scientific studies during first HALO demo missions

在开发了用于在第一个STSPP阶段部署在Halo上的半导体激光湿度计HAI之后，我们在这里建议在即将到来的四个科学任务中部署它：TACTS/SALSA、CERRUS-ML、CERRUS-RS和POLSTRACC。计划中的频繁部署要求开发新的快速数据检索算法。重点将进一步加强HAI和其他HALO湿度计的质量控制，这些HAI和其他HALO湿度计嵌入SPARC牵头的国际项目，以便使HALO水数据(即总水、气相水和冰水含量)与其他国家和国际飞行任务的数据相一致。这些活动包括对照PTB标准进行验证，在AIDA KIT小室组织和参与湿度计的国际验证运动，在飞行中与HALO和其他平台上的其他仪器进行相互比较，以及制定国际公认的校准程序标准和新的飞行中校准设备。在执行任务期间获得的数据将用统计方法进行分析，以汇编特热带热带地区的水分布及其季节变化。用FZJ的CLAMS模式对UTLS的动力过程进行了全面的理论模拟，重点是对流层顶逆温层。

After the development of the diode laser hygrometer HAI for deployment onboard HALO in the 1stSPP phases, we here propose its deployment during four upcoming scientific missions: TACTS/SALSA, Cirrus-ML, Cirrus-RS and POLSTRACC. The planned frequent deployment requires thedevelopment of new fast data retrieval algorithms. A focus will further be a strong quality controlof HAI and other HALO hygrometers, embedded in international programs lead by SPARC, in orderto make the HALO water data, (i.e. total water, gas phase water, and ice water content) compatiblewith those from other national and international missions. They include validation againstPTB standards, the organization of and participation in an international validation campaign forhygrometers at the AIDA chamber of KIT, in-flight intercomparison with other instruments on HALOand further platforms, and the development of internationally accepted standards for calibrationprocedures and new in-flight calibration equipment. The data obtained during the missionswill be analyzed with statistical methods to compile a water distribution in the extra tropical UTLSand its seasonal variability. Simulations with the CLaMS model of FZJ will be made towards acomprehensive theoretical understanding of dynamical processes in the UTLS with a focus on thetropopause inversion layer.