Continuing Studies of Airborne Thermometry

测量多云空气中的温度对大气科学家来说是至关重要的。不幸的是，如果用于测量温度的传感器变湿，则无法正确测量云内空气温度。已经开发了许多不同的外壳，用于屏蔽温度传感器免受水成物的影响，同时允许对环境空气进行充分的采样。然而，到目前为止，所有的外壳仍然允许一些传感器在各种条件下润湿。然而，这个问题的严重程度很难确定，因为没有标准来测试浸入式传感器。最近，一种完全不同的仪器已经开发出来，它不会受到这种潮湿问题的影响。不幸的是，这种被称为辐射温度计的仪器价格昂贵，体积又大又重，这使得在不久的将来不可能在研究飞机上广泛使用。主要研究人员将使用这种辐射温度计来研究最常用的浸入式探针的润湿特性。将获得关于问题的严重程度和发生润湿的条件的新知识。这将允许对先前收集的数据进行事后校准，从而提高其质量。从这项研究中获得的知识也将使首席研究人员能够继续开发一种重量轻、价格更低的浸入式传感器的改进外壳。

The measurement of temperature within cloudy air is of fundamental importance to atmospheric scientists. Unfortunately, in-cloud air temperature can not be properly measured if the sensor used to measure the temperature becomes wet. Many different housings have been developed for the purpose of shielding temperature sensors from hydrometeors while allowing adequate sampling of ambient air. To date, however, all housings still allow some sensor wetting under various conditions. The extent of this problem has been difficult to ascertain, however, because no standard existed against which immersion sensors could be tested. Recently, a fundamentally different instrument which does not suffer from this wetting problem has been developed. Unfortunately, this instrument, known as a radiometric thermometer, is expensive, large and heavy which makes widespread use in research aircraft unlikely in the near future. The Principal Investigators will use this radiometric thermometer to study the wetting characteristics of the most commonly used immersion probes. New knowledge will be gained on the magnitude of the problem and the conditions under which wetting occurs. This will allow post calibrations to be applied to previously collected data, thus improving its quality. The knowledge gained from this study also will allow the Principal Investigators to pursue developing an improved housing for a light weight and less expensive immersion sensor.