[RFI] Bad noise on 2m band, only during day

[Enrico Lorenzoni IU3AZC]

Hello everyone, I'm trying to chase this bad noise that I receive from 
my shack.

I have a fairly sized yagi on 144 and I can hear this noise coming from 
a certain direction.

So I left an RTL-SDR on for some hours and I found that the noise is 
higher during day (high temperature? low humidity?) and almost 
disappears during night.

Here it is some spectrum:

https://imgur.com/F0ByNTK


And also an hourly plot:

https://imgur.com/3KdjxeB



Before going around with my car, can you recognize this kind of noise 
and give me some hints?


Thanks,

-- 


73 de Enrico IU4AZC