Optimising Gain

This too low. Your gain varies between 37 and 29. You can restrict the lower limit to say 32 by following setting

For vanilla Raspberry Pi OS with package install of piaware & dump1090-fa:

Edit file `/etc/default/dump1090-fa, and change

ADAPTIVE_MIN_GAIN=
To
ADAPTIVE_MIN_GAIN=32

Save (Ctrl+O) and Close (Ctrl+X) file.

Restart dump1090-fa.

sudo systemctl restart dump1090-fa

For piaware SD card image:

Issue following commands:

sudo piaware-config adaptive-min-gain 32

sudo reboot

 

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Done!!

I’ll post a graph later.

Thanks!!

Jay

My 24 hour graph now has the average down to 2.1% with the adaptive gain varying between 24 and 48 average approx 38. would a minimum adaptive gain assist? single message tracks also seem high. Screen caps of graphs… quality not great will post individual graphs as required. TIA


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No need to take screenshot of graphs. Just right-,click on graph, and in the popup select “Copy image”. This will copy the image to clipboard.

Next place mouse cursor in forum post you are creating, then press Ctrl+V to paste the image from clipboard.into your post.

 

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Am not on home LAN at present … can post better images later if needed… my installation is a pi and i tend to view the graphs on a phone that i use to post to the forum with… must be the middle of the night for you in toronto… i am in manchester uk…

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I am now replying from my Android Phone Samsung.I am at home, and can see graph of my Pi on my home LAN

I opened graph, and took screenshot. Resolution is not good. Next I tapped on one of the graphs (Misc), and it opened in a separete page (see Image-1 below).

I long-pressed graph (Misc), a popup with several options appeared, I clicked the option “Copy image”. This copied image to clipboard. Then I closed graph tab and opened forum and long-pressed and chose “Copy”, and graph (Misc) was copie (see Image-2 below)

Image-1:

 

Imae-2:

image

 

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will post graphs in better res a little later as per your instructions TY TY

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latest 24 hour graphs more legible now I hope anything else l can do to improve performance?

image

image

image

image

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Your maximum range is 200nm and average range is 135nm.

The maximum achieveable range mainly depends on terrain arround antenna and partially on antenna height.

Please check what is the maximum range achieveable at your location & antenna height by my following 2015 how-to (still valid)

What is the Maximum Range I can Get?

 

 

my antenna is 60cm placed in an upper floor window facing east

would a dark blue filter help?

are all those pink tracks with a single message a issue

image

TIA

Check if you need a filter ny method given in following How-to:

Do I Need A Filter?

 

UPDATE to How-to

Use following commands to install imaging package on Raspberry Pi

(1) For Raspberry Pi OS Bookworm and Bullseye :

sudo apt install python3-pil

(2) For Raspbian Buster :

sudo apt-get install python-pil

(3) For Raspbian Stretch and Jessie :
sudo apt-get install python-imaging

it appears you have a lot of potential range but your antenna positioned in the window pointing East is certainly a limiting factor. Do you have access to any better viewpoint?

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unfortunately no access to better placement of antenna. are the pink single message tracks an issue? if so how should they be handled

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(1) I have no idea about pink single message tracks.
@wiedehopf is in a better position to answer this.

(2) Did you run the Scan for RF Noise?

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3am here will run through your instructions tomorrow will advise results. might be Sunday as need access to my pc at the office. how do I get the scan results out of the pi?

 

In “Do I Need A Filter” under OPTION-1:

STEP-6 of 6:

Copy the image “scan.png” from Pi to your Win/Mac Computer. To copy a file from Pi, you will need to install on your Win/Mac computer an SCP software. Some popular free of cost software are FileZilla (win and mac) or WinSCP (win) or CyberDuck (win and mac).

 

ADDITIONAL METHOD: USING WINDOWS COMMAND PROMPT

Type cmd in search of Windows to open Command Prompt

image

In the Command prompt terminal, type following command

scp pi@192.168.12.21:/home/pi/scan.png Downloads\
(Replace 192.168.12.21 by your RPi’s local IP addtess)

When asked, enter RPi’s password.

The above command will copy file scan.png from RPi to Windows folder Download

Please see screenshot below

 

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thank you for the details wouldn’t have been able to get it done without them. I’ll post the scan later…

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completed scan
chopping up the image
here is the full file

 

Most likely you will benefit from 1090MHz only, filter (FA dark blue filter), and your max range is likely to increase.

 

 

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