GTS探空仪碳湿敏元件性能测试数据分析及相对湿度订正

Analysis of GTS Radiosonde Humidity Sensor Testing Data and Correction of Upper-Air Relative Humidity Radiosonde Data

碳湿敏元件受温度影响明显,造成相对湿度探空数据测量的误差。利用温湿控制设备对该元件进行静态试验,测试不同温度对元件感湿特性的影响。通过对试验数据分析计算得到元件的相对湿度温度项订正数据,以及相对湿度的温度项订正拟合公式,可以有效订正由温度引起的相对湿度探空数据误差。对实际相对湿度探空数据资料订正效果的对比分析表明,经过温度项订正后的相对湿度探空数据,不但其准确度得到了提高,而且清楚地体现出在订正之前所不能体现的高空大气相对湿度在低湿段的变化细节。

The carbon humidity sensor＇s resistance is significantly influenced by temperature, resulting in upperair relative humidity sounding data errors. Through static tests on the sensors in the temperature-humidity controlled chamber, the testing of the resistance changes was conducted under different temperatures. Based on the analysis and calculation on these lab data, the correction data of relative humidity and temperature were ob- tained, and the relative humidity correction equation was established, which can effectively correct the errors caused by temperature correspondingly. The comparison and analysis of correction on real upper-air relative humidity sounding data indicates that not only the accuracy of relative humidity data is improved after correction, but also the detailed variations in relative humidity at the upper atmosphere during the lower humidity period can be clearly manifested, which cannot be seen before correction.