“雷达探​​测”是什么意思？

Question

当我跑步时sudo iw phy，我得到，

5500 MHz [100] (22.0 dBm) (no IR, radar detection)
5520 MHz [104] (22.0 dBm) (no IR, radar detection)
5540 MHz [108] (22.0 dBm) (no IR, radar detection)
5560 MHz [112] (22.0 dBm) (no IR, radar detection)

什么是雷达探测在这种情况下意味着什么？