Test and intercomparison of water, aerosol, cloud droplet, ice particle, and ice nuclei instruments for the HALO aircraft using the AIDA facility (AIDA-HALO)

该提案建议继续利用卡尔斯鲁厄理工学院（KIT）的AIDA（大气中的气溶胶相互作用和动力学）设施进行成功的一系列飞行前仪器测试活动。AIDA气溶胶和云室在其温度、压力和湿度范围、体积以及全面的痕量气体和气溶胶仪器方面是独一无二的。实验条件涵盖了HALO飞机所达到的水混合比和大气相对湿度的全部范围。不同的仪器进行校准和相互比较，并在典型的飞机上升和下降过程中测试它们对压力变化的响应。有18种不同的HALO仪器参加的前四次AIDAHALO活动证明是仪器开发商在各种操作和采样条件下使用和测试其仪器的良好机会。所有合作伙伴都表示有兴趣并需要在AIDA设施进行更多的仪器测试。第二个供资期的工作方案将包括：（1）一系列新的HALO仪器测试活动，这些活动将继续并补充第一个供资期的活动;（2）三个测试云探测器、冰核仪器和水蒸气仪器的国际活动;（3）两个涉及仪器方面和科学目标的活动，这些活动将补充第一个HALO飞行任务。国际伙伴参与的AIDA运动是制定和证明HALO仪器高国际质量标准的建议的一个关键要素。

The proposal suggests continuing the successful series of pre-flight instrument test campaigns using the AIDA (Aerosol Interaction and Dynamics in the Atmosphere) facility of the Karlsruhe Institute of Technology (KIT). The AIDA aerosol and cloud chamber is unique in regard of its temperature, pressure, and humidity range, volume, and the comprehensive trace gas and aerosol instrumentation. The experimental conditions cover the full range of water mixing ratios and relative humidity of the atmosphere reached by the HALO aircraft. The different instruments are calibrated and compared to each other and their response to pressure changes during typical aircraft ascents and descents is tested. The first four AIDAHALO campaigns with the participation of 18 different HALO instruments proved to be a good opportunity for instrument developers for employing and testing their instruments at various operating and sampling conditions. All partners have expressed their interest in and the need for more instrument testing opportunities at the AIDA facility. The work program of the second funding period will encompass (1) a new series of HALO instrument test campaigns which will continue and complement the activities of the first funding period, (2) three international campaigns for testing cloud probes, ice nuclei instruments and water vapour instruments, and (3) two campaigns addressing both instrumental aspects and scientific objectives which will complement the first HALO missions. The AIDA campaigns with the participation of international partners are a key element of the proposal for developing and proving high international quality standards for HALO instrumentation.