An In-Flight Calibration Method for Near-Real-Time Humidity Measurements with the Airborne MOZAIC Sensor
An In-Flight Calibration Method for Near-Real-Time Humidity Measurements with the Airborne MOZAIC Sensor
复制标题
使用机载 MOZAIC 传感器进行近实时湿度测量的飞行校准方法
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
D. Kley
中科院分区：
文献类型：
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作者：
Herman G. J. Smit;A. Volz;Manfred Helten;W. Paetz;D. Kley
本文介绍了空中客车在役飞机(MOZAIC)自1994年以来常规飞行的湿度传感器的一种新的飞行中校准(IFC)方法。IFC方法校正传感器在零相对湿度时的潜在漂移，这是确定测量不确定度的关键参数。传感器偏移量是根据在飞机在湿位或以上的较低平流层飞行期间获得的测量结果本身确定的，此时H2O混合比达到明确定义的最小值约5ppmv，大气H2O对传感器信号的贡献微乎其微。平流层数据的选择是在潜在温度的帮助下实现的，潜在温度可以根据测量的温度和压力现场计算。IFC方法能够提供近实时的湿度测量，其表面相对湿度的不确定度为±8%，相对湿度的不确定度为±7%.
Abstract A new in-flight calibration (IFC) method is described for the humidity sensor flown routinely since 1994 on the Measurement of Ozone and Water Vapor by Airbus In-Service Aircraft (MOZAIC) program’s aircraft. The IFC method corrects the potential drift of the sensor offset at zero relative humidity, which is the critical parameter in determining the uncertainty of the measurements. The sensor offset is determined from the measurements themselves as obtained during periods when the aircraft is flying in the lower stratosphere at or above the hygropause, where the H2O mixing ratio reaches well-defined minimum values of about 5 ppmv and the contribution of atmospheric H2O to the sensor signal is minimal. The selection of stratospheric data is achieved with the help of potential temperature, which can be calculated in situ from measured temperature and pressure. The IFC method is capable of providing humidity measurements in near–real time with an uncertainty of ±8% RH at the surface and ±7% RH in the...