The characteristics of clutter in look-down mode for helicopter radar is presented.
以直升机雷达平台为背景，分析了机载雷达下视模式的杂波特性。
The characteristics of the ground and sea clutter have some important effects on the airborne PD radars with look down mode.
地海面杂波特性对主要采用下视工作方式的机载脉冲多普勒（PD）雷达具有十分重要的影响。
The characteristics of the ground and sea clutter have some important effects on the airborne PD radars with look down mode.
地海面杂波特性对主要采用下视工作方式的机载脉冲多普勒（PD）雷达具有十分重要的影响。
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