[450] ADS-B receiver

[Robert Busino]

Cool. Great report as well.  I do love charts, graphs,and statistics!
  
  
  

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 From: "David McKenzie" <dmckenzie at gmail.com>
Sent: Monday, May 23, 2016 12:45 PM
To: "144. 450 Mailing List" <450 at lists.vhfwiki.com>
Subject: [450] ADS-B receiver   
After a few days logging ADS-B and mode-s transponders from aircraft 
overhead here's how it hears. The antenna is in the attic directly 
conencted to an "airspy mini" sdr dongle (99 bux, 6ish MHz bandwidth very 
nice, rx only). It's a homebrew colinear made out of 11cm sticks of rg58. 
https://i.sli.mg/jpLLLM.png https://i.sli.mg/SqYRri.png The range circles 
are 20 miles each, red is 30,000ft+, purple is 20k-30k, dark green is 
10-20k and light green is under 10k. From inside the attic it can pretty 
much hear every takeoff and landing at oxford but I lose planes into 
bradley under about 4000 feet. 
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