Less airplanes tracked since 5 days


#1

Hello, I have a problem. Since 1st of march my number of positions/flight tracked is drastically reduced without motivation. I was wondering that aircraft traffic decreased , but analysing near receivers this is not possible because they track the same number of flights… Maybe the ads b receiver damaged? Or the antenna? Thanks


#2

The decrease is substantial, but without knowing more about your installation, it’s hard to say.

I had a similar experience last September, an even bigger decrease. I checked everything, in the end, the dongle was faulty.

Check all cables, the shorter and thicker, the better. Anything exposed to the elements, check for water.


#3

Yes, check for water, if the sun is shining and everything is dry, maybe traffic is increasing.
And then you know.


#4

Well, this week snowed a lot Here, followed by rain… But i’ve been using this antenna for months , also during heavy thunderstorms… now I checked up my antenna and dried it and putted more hot glue to better insulate some parts. My instruments are:
-orange Pi zero with active fan for dissipation
-rtl2832U basic dongle without case.

  • DIY antenna displayed in my foto.
    -TV antenna cables.
    -dongle and orange pi into a waterproof (tested ) electrical plastic case.
    I can’t understand what happened :frowning: . Maybe I will try changing antenna. Thanks a lot.

#5

Check for a new source of noise.
See abcd567’s post on do I need a filter.
You may also try re-runing the gain optimisation script.

The sudden change makes it likely to be weather, a fault or electrical noise.


#6

what is the command for the optimisation script? thanks. tomorrow I’ll build another antenna


#7

Similar problem here:

Dropout during weekend away, after return monday afternoon wiggled cables & Raspberry. Seems to have solved the problem. However, remote SSH over WiFi failed during the difficult period so it could have been a connection issue, possibly interference from neighbours. Anyway - no good explanation found but connection issue seems more likely than cable problem based on the symptoms.

So now I’m looking for a 5GHz or dual band WiFi dongle supported by Raspbian…

NB: Second receiver did not have any problems…

GL with searching for a cause!


#8

i noticed some network problems in these last days, but the “offline times” that you see in my photos are caused by some problems on my orange pi. in fact i implemented an hardware watchdog that every 2 hours ping the ip of orange pi and if it can’t reach the pc, the watchdog send the reboot command. When i watch your photos i notice that the number of flights tracked is similar when your pc is online…


#9

You’re right. I should install the watchdog timer, have the script but not installed it yet :grin: Have not taken the time for that but will do so now.


#10

Little update. I built a new antenna, very similar to the previous one and for 2 days worked pretty well. today I experienced the same problem of less tracked airplanes. I also insulated the antenna contacts with hot glue to avoid water. what can i do? thanks

. i think it is water (in theese days there is a bad weather here), but i want to understand where water can enter…


#11

Sometimes i just reboot my router and everithing is oke.
Maybe you can try it to.
Otherwise you have a perfect weather station on that screen :slight_smile:
Water can enter almost everywhere, i use rubberband around plugs.
3M Scotch 23 Self bonding electrical tape.
https://www.ebay.com/p/3M-Scotch-23-Self-Bonding-Electrical-Tape-1-5-X-30/1503026377
(8 Dollars)


#12

well, i’ve just finished drying the contact on the antenna… water was making short between ground and the signal pin -.- . let’s see now


#13

If you keep your Spider exposed to atmosphere, it will get water again after sometime. Apply some sealant or self-fusing tape around connectors.

Alternatively put your Spider inside an enclosure, like a large plastic jar, something like this:

https://forum.flightradar24.com/threads/3831-best-antenna?p=55629&viewfull=1#post55629


#14

i’m just thinking about a proper enclosure for the antenna(now i putted a plastic bag for frozen food on it and sealed with some electrical tape)… but seems that also after driying situation is the same… let’s see :frowning: