Bug in Europe Radar?

[jmh2002]

Saw this interesting radar image in Europe today, maybe it's a bug?

[Gkikas LGPZ]

@jmh2002
https://community.windy.com/topic/8227/a-strange-movie/3

[Gkikas LGPZ]

@Gkikas-LGPZ

[jmh2002]

Thanks :) I must admit that I have never heard of 'clear air mode' for radar.

[Gkikas LGPZ]

@jmh2002
It also happens if receiver's noise exceeding the noise threshold.
Other "strange" images are:
Spirals, due to receiving another radar's transmitted pulse.
Radial spokes, due to WiFi 802.11N base units operating within wx. radar spectrum space (5600-5650 MHZ).

[TomSlavkovsky]

@jmh2002 this article explains radar interference

https://blog.metservice.com/Radar_Interference

[jmh2002]

Thanks, I'm actually quite familiar with radar itself, having operated marine radar in a professional capacity for many years, however I just wasn't familiar with the 'clear air' mode that @Gkikas-LGPZ referred to, or visually, the echo pattern that it created.

It seems that this is more of a meteorology specific mode and usage.

[suzeomni]

@jmh2002 This is the same circular formation I seen yesterday over India.