TK-2GPS人影探空火箭与L波段探空数据差异性分析

Analysis of Difference between Observations by TK-2GPS Sounding Rocket and L-Band Sounding Radar

开展TK-2GPS人影探空火箭探测数据的分析检验,对于了解试验仪器的适用性和数据可靠性及其在人影中的应用前景非常重要。利用TK-2GPS人影探空火箭和L波段探空资料,采用平均偏差、均方根误差和相关系数等分析方法,对两种探空的温度、相对湿度、风向及风速等要素的差异性和变化特征进行了对比分析,并对可能造成差异的原因进行了探讨。结果表明:探空火箭与L波段探空同要素间均呈显著的正相关,通过了0.05及以上显著性检验。温度、风速平均偏差和离散度较小,相关性最好;相对湿度的平均偏差虽大,但相关性较好;风向在各高度层的离散度较大。两种探空的温度、风速垂直廓线变化趋势一致性高;相对湿度垂直廓线变化趋势存在一定差异,前者相对湿度较后者明显偏小。随水平探测距离的增加,探空火箭探测数据相对L波段探空的偏差值有所增大。通过相关分析建立的相对湿度订正方程,能很好地对探空火箭的相对湿度进行订正。

It is very important to analyze and test the data of the TK-2GPS sounding rocket for understanding the applicability and the data reliability of the test instrument and its application prospects in weather modification.Based on the analysis methods of average deviation(BIAS),root mean square error(RMSE),and correlation coefficient,usging the TK-2GPS sounding rocket and L-band sounding radar data,the differences and variation characteristics of the sounding data such as temperature,relative humidity,wind direction and wind speed are compared and analyzed,and the possible causes of the differences are discussed.The results show that the TK-2GPS sounding rocket and the L-band sounding have significant positive correlations with the same elements,and passed the significance test of 0.05and above.Analyses of the differences between the two sounding data reveal that the average deviation and dispersion of temperature and wind speed are small;although the average deviation of relative humidity is large,correlation is good;the dispersion of wind direction at each level is large,and the correlation is poor.The vertical profiles of temperature and wind speed of the two soundings are highly consistent.The vertical profile of relative humidity is significantly different at low altitudes and more consistent at higher altitudes;the relative humidity at low altitudes is greater than that at high altitudes.The difference trend in wind profiles is just the opposite of relative humidity profiles.With the increase of horizontal detection distance,the deviation of each element of sounding rocket from L-band sounding increases.The correction equation of relative humidity is established by correlation analysis.It can correct the relative humidity of sounding rockets very well.