Ground Clutter as a Monitor of Radar Stability at Kwajalein, RMI
Ground Clutter as a Monitor of Radar Stability at Kwajalein, RMI
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地面杂波作为马绍尔群岛夸贾林环礁雷达稳定性的监测器
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
J. Pippitt
中科院分区：
文献类型：
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作者：
D. Silberstein;D. Wolff;D. Marks;D. Atlas;J. Pippitt
摘要在许多应用中，雷达灵敏度的绝对校准和日常校准是必要的。在雷达定量测量降水量时尤其如此。虽然可以通过使用天线范围、标准目标和太阳辐射等各种技术定期进行精细校准，但需要了解这些检查之间发生的变化，以保持数据的准确性。本文提出了一种方法，为此目的，使用夸贾林环礁上的雷达提供一个基线校准控制的测量降雨量的热带降雨测量任务（TRMM）的使命。该方法使用来自多个地面目标的回波。最低仰角扫描的日平均杂波回波在每小时、每天和每月都非常稳定，在± 1dB以内。它们只有在故意的系统修改，设备故障或其他情况下才会发生显着变化。
Abstract There are many applications in which the absolute and day-to-day calibrations of radar sensitivity are necessary. This is particularly so in the case of quantitative radar measurements of precipitation. While fine calibrations may be made periodically by a variety of techniques such as the use of antenna ranges, standard targets, and solar radiation, knowledge of variations that occur between such checks is required to maintain the accuracy of the data. This paper presents a method for this purpose using the radar on Kwajalein Atoll to provide a baseline calibration for the control of measurements of rainfall made by the Tropical Rainfall Measuring Mission (TRMM). The method uses echoes from a multiplicity of ground targets. The daily average clutter echoes at the lowest elevation scan have been found to be remarkably stable from hour to hour, day to day, and month to month within better than ±1 dB. They vary significantly only after either deliberate system modifications, equipment failure, or o...