Inversion forcast

A place to talk about everything Radio and Scanning

Inversion forcast

Postby m0lsx » Tue Dec 19, 2017 8:08 pm

I have just seen the BBC news & the weather forecaster was talking about the probability of inversion.
So look out for DX on 10 meters & up.
Inversion is where we get an inversion of the normal the higher you go the colder the air gets.
Fog is often a common cause of inversion. But sometimes we can get multiple inversions that cause what amounts to a tunnel of warmer less dense air that funnels signals over VERY long distances. This is called Tropospheric Ducting.
Buy a database from Kimmy JS19 via http://ukscanningdirectory.co.uk/
Or do Google search of this forum via https://www.google.com/cse/home?cx=partner-pub-6291336405621919:2662881632
73 De Alan (M0LSX.)
http://www.qrz.com/db/M0LSX"
User avatar
m0lsx
 
Posts: 5474
Joined: Wed Nov 21, 2012 9:14 pm
Location: Norwich. TG21.

Re: Inversion forcast

Postby Davie Boy » Tue Dec 19, 2017 8:43 pm

This is good news thanks for the heads up.... this is what you call a lift then? ....is it good for VHF and UHF too...?
User avatar
Davie Boy
 
Posts: 124
Joined: Sun Nov 01, 2015 9:16 pm
Location: Nottingham

Re: Inversion forcast

Postby m0lsx » Tue Dec 19, 2017 9:32 pm

Yes, a lift is anything that improves distances for us. The are any number of different forms of propagation, some better than others.
Buy a database from Kimmy JS19 via http://ukscanningdirectory.co.uk/
Or do Google search of this forum via https://www.google.com/cse/home?cx=partner-pub-6291336405621919:2662881632
73 De Alan (M0LSX.)
http://www.qrz.com/db/M0LSX"
User avatar
m0lsx
 
Posts: 5474
Joined: Wed Nov 21, 2012 9:14 pm
Location: Norwich. TG21.

Re: Inversion forcast

Postby Minus1 » Thu Dec 21, 2017 10:11 am

In my experience, most of these forecasts turn out to be nothing.
Scanning remote ATIS freqs is an effective way to detect lift, as they transmit continously.

In Birmingham I find lift usually favours the east and south --- I often get RAF Waddington, Brize, Benson.
But I've never once detected RAF Shawbury ATIS.
I reserve the right to ignore people who have made no attempt to the read the manual, and expect others to do it for them.
User avatar
Minus1
 
Posts: 643
Joined: Fri Jun 05, 2015 8:17 am
Location: West Midlands

Re: Inversion forcast

Postby m0lsx » Thu Dec 21, 2017 10:53 am

Minus1 wrote:In my experience, most of these forecasts turn out to be nothing.
Scanning remote ATIS freqs is an effective way to detect lift, as they transmit continously.

In Birmingham I find lift usually favours the east and south --- I often get RAF Waddington, Brize, Benson.
But I've never once detected RAF Shawbury ATIS.


I have a few amateur radio repeaters, plus all of the 10 meter repeaters in my scanner that I know will pick up during a lift.
Buy a database from Kimmy JS19 via http://ukscanningdirectory.co.uk/
Or do Google search of this forum via https://www.google.com/cse/home?cx=partner-pub-6291336405621919:2662881632
73 De Alan (M0LSX.)
http://www.qrz.com/db/M0LSX"
User avatar
m0lsx
 
Posts: 5474
Joined: Wed Nov 21, 2012 9:14 pm
Location: Norwich. TG21.


Return to Radio and Scanning Chat

Who is online

Users browsing this forum: Bing [Bot] and 1 guest