Combined Use of TRMM/PR and Disdrometer Data to Correct Reflectivity of Ground-Based Radars
Combined Use of TRMM/PR and Disdrometer Data to Correct Reflectivity of Ground-Based Radars
复制标题
结合使用 TRMM/PR 和测距仪数据来校正地基雷达的反射率
DOI：
10.2151/sola.2008-026
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发表时间：
2008
期刊：
影响因子：
1.9
通讯作者：
Y. Fujiyoshi
中科院分区：
文献类型：
--
作者：
M. Katsumata;T. Ushiyama;K. Yoneyama;Y. Fujiyoshi
提出了一种校正多个雷达反射率数据的程序。 TRMM/PR（热带降雨测量任务卫星/降水雷达）用作标准校准器。来自测速仪的数据还用于解释短波长降雨衰减的影响。该程序在 MISMO（用于研究 MJO 对流起始的 Mirai 印度洋巡航）观测到的海洋降雨的情况下进行了评估，其中部署了两个雷达； C波段舰载雷达和X波段地基雷达。在C波段雷达上，传统的修正方法对雨衰、二程回波、障碍物阴影和噪声等因素进行修正，得到的反射率数据与TRMM/PR的反射率数据非常接近。对于X波段雷达，与TRMM/PR的迭代匹配有效地校正了反射率，并借助测距仪数据反映了雷达附近雨水的衰减。两种雷达的校正反射率与 TRMM/PR 的反射率非常匹配，偏差可以忽略不计，偏差也减少了。
A procedure to correct the reflectivity data from multiple radars is proposed. The TRMM/PR (Tropical Rainfall Measurement Mission satellite/Precipitation Radar) is used as the standard calibrator. The data from a disdrometer is also used to account for the effects of rain attenuation at short wavelengths. The procedure is evaluated in the case of oceanic rain observed in MISMO (Mirai Indian Ocean cruise for the Study of the MJO-convection Onset), in which two radars were deployed; a C-band shipborne radar and an X-band ground-based radar.On the C-band radar, the traditional corrections for the factors such as rain attenuation, second-trip echos, shadows by obstacles, and noise, result in reflectivity data which closely matches that of the TRMM/PR. For the X-band radar, iterative matching to the TRMM/PR worked effectively to correct the reflectivity, with the aid of the disdrometer data to reflect the attenuation by the rain in the vicinity of the radar. The corrected reflectivity from both radars well matches that of TRMM/PR with negligible biases and reduced deviations.