新一代天气雷达负仰角探测能力分析  

Analysis of Detection Capability of CINRAD/SA Using Negative Elevation Angle

作　　者：张扬成[1,2] 游文华[1] 高翔宇[1] 陈汇[1] 刘翔[1] 

机构地区：[1]福建省气象台,福州350001 [2]南京信息工程大学,南京210044

出　　处：《气象科技》2013年第1期15-19,共5页Meteorological Science and Technology

摘　　要：由于地球曲率的影响,当CINRAD/SA新一代天气雷达使用目前最低仰角固定为0.5°的模式探测时,探测盲区较大,对低层降水回波的探测能力严重不足。在实地展开试验的基础上,推导了负仰角探测时雷达最低探测高度计算公式,计算出仰角为0.5°、0°、-0.3°、-0.5°时不同探测距离上的雷达最低探测高度,对比分析不同仰角观测模式的主要雷达产品特点,探讨新一代天气雷达使用负仰角观测模式的局限性,提出了新一代天气雷达使用负仰角观测的建议。Due to the influence of the curve Earth, the fixed detection mode of the CINRAD/SA weather radar uses the minimum elevation angle of 0.5 °, so the blind area is relatively big, and the detection capability for low-level precipitation echoes is limited. On the basis of experiments, the calculation formulas of the minimum height applicable when CINRAD/SA detects with positive and negative elevation angles are devised. Then the minimum detecting heights of CINRAD/SA at different distances with different elevation angles （0.5°, 0° --0.3°, --0.5°） are calculated. Through analyzing characteristics of radar products detected under different elevation angles, some suggestions on CINRAD/SA about using negative elevation angles are presented.

关 键 词：负仰角 最低探测高度 最大探测距离 多普勒天气雷达 

分 类 号：TN959.4[电子电信—信号与信息处理]