L波段雷达探空系统气压测量值与气压反算气压值的误差分析

Error analysis between pressure measurement and pressure anti-calculation in L-band radar sounding system

以锡林浩特和南京探空站为例,用雷达定位信息计算的位势高度和用气压计算的位势高度与GPS导航测风探空仪所测高度进行比较;用雷达高度反算的气压值和GTSI型探空仪用气压传感器直接测量的气压值与GPS导航测风探空仪测量的气压值进行比较。结果表明:用雷达定位信息计算位势高度可以替代用气压计算的位势高度并应用于业务;而用雷达高度反算40hPa的等压面高度以上可以代替探空仪对气压的直接测量。在用L波段雷达的情况下,用高度反算气压的可行性应进一步研究。

Taking the example of Xilinhaote and Nanjing sounding stations, this paper makes a comparison for geopotential height calculated by radar location, pressure calculation and GPS radiosonde respectively. Meanwhile, the pressure values measured by the radar, GTS1 pressure sensor and GPS wind sounder are compared. The results show that the geopotential height can be calculated by radar location instead of pressure calculation. With the substitution of radiosonde direct measurement,the pressure above 40 hPa can be anti-calculated based on radar height. In the case of using L-band radar, the feasibility of pressure anti-calculated by means of the height should be studied further.