Poor reception in colder weather

jtmathome

Member
Joined
Mar 12, 2003
Messages
9
Location
Xenia, OH
I used the get about 100-150 aircraft during the daytime hours (ADS-B). It's gotten cooler out and it runs about 50, is this normal? I know there's less small private aircraft during temperature extremes, but that's not equal to 30%.
 

a417

!#
Joined
Mar 14, 2004
Messages
2,385
Can you test your setup temporarily on another service...like tuning it to NOAA or something? It's hard to tell where you are if there is actually less air traffic, or if the cold has things contracting in your feedline and is affecting the signal path.
 

jwt873

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Dec 1, 2015
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Location
Woodlands, MB
Not sure why you're seeing fewer AC. I've been feeding Flightradar25 for six years now. Gets down to 40 below here the odd time in the winter. I've never noticed any change in reported AC.. We've been around 25 - 35 F for the last few weeks. Still getting lots of AC up to 200 nautical miles.


fr24.jpg
 

spanky15805

Newbie
Joined
Sep 18, 2004
Messages
238
jtmathome...could there have been an inversion in your area? Maybe condensation in coax or antenna?
 

GlobalNorth

Yutes On The Air?
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May 2, 2020
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Verde Valley & the Hassayampa River
Easiest thing to do is to recall how old the coax is - it may be time to replace it. If you have to think hard about when it was last replaced - it is time for new coax. Assuming the coax is newer, check all the connections.

Make certain to seal all connections with weather resistant coax tape.
 

jtmathome

Member
Joined
Mar 12, 2003
Messages
9
Location
Xenia, OH
As for foliage, there's much less of it now than there was before. This is a new installation, so I'll get up there and make sure everything is tight and insulated.
 

vagrant

ker-muhj-uhn
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Nov 19, 2005
Messages
2,319
Location
California
I have been feeding 1090 MHz ADS-B for around 10 years now and I have not noticed a difference in the winter. Well, actually a little bit more range with the lack of foliage, but not less. Something may be loose, or causing interference. I use an amplifier, but it also has a filter which I'm sure keeps the RFI I cause myself while TX out of it.
 

AM909

Radio/computer geek
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Dec 10, 2015
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405
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SoCal Inland Empire
I assume the bulk of the traffic you hear is going to/from KDAY? Is there maybe construction or something else going on there, or something going on at KFFO, that has altered the traffic pattern?
 

vagrant

ker-muhj-uhn
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Nov 19, 2005
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California
@AM909 The OP noted ADS-B, so they are monitoring signals directly from aircraft on 1090 MHz and or 978 MHz. They are not monitoring voice conversations, but rather data bursts that a computer program handles.
 

AM909

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Dec 10, 2015
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SoCal Inland Empire
Yes, that's what I understood. If there are fewer flights landing/departing KDAY in the direction of Xenia, ...
 

jtmathome

Member
Joined
Mar 12, 2003
Messages
9
Location
Xenia, OH
signal loss' in all directions, about 50 miles less. I used to have my heaviest blips out to 150-200 miles, now 100-150 miles is the norm now.
 
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