Electronics > Projects, Designs, and Technical Stuff
Radio Direction Finding
PA3BNX:
Hello EveryBody,
I have now two Doppler's running on 2 separate soundcards on one PC
and these plotted on one Map program.
Of course I have two receivers on 2 meter and 2 Doppler array antenna.
Every SoundDoppler program has it own color arrow point
I will soon upload the new SoundDopplerAll.zip with these futures in it.
PA3BNX:
Hello EveryBody,
Some news from SoundDoppler direction finding:
I finally got it working with TCPIP so it can
communicate with APRSIS32.exe from Lynn Deffenbaugh KJ4ERJ
APRSIS can gate it to Igate
if you have a passcode.
So it can be easy real time plotted now also over the APRS servers.
The version is SoundDoppler132All.zip can be found on
http://www.pi4wag.nl/index.php/pseudo-doppler-radio-direction-finder
Also this version can send the DF report or packet report
through a comport or copy it to clipboard.
Happy foxhunting and monitorring all.
PA3BNX:
Hello EveryBody,
I found our Chineese friends doing also very nice RadioDirectionFinding things
Chinees doppler finding
www.hocool.com
BG1CNX lee hocool
16 Led
70cm TDOA
APRS Balloon Hunt China
So happy vieuwing Direction finding movies and the Websites too
PA3BNX:
Hello Every Body
Again some nice Radio Direction Finding Movies
ddf007 rS
Have fun watching
There wil be soon an update SoundDoppler.exe version from me available
PE5EDW:
Very interesting topic. I have put your SoundDoppler software on my ARDF Support website
http://www.ardfsupport.nl/ (and on my local Raspi server http://ardf.xs4all.nl/) with a refererence to the source. And keeping it up-to-date of course... :-+
Also on this ARDF Support site you can find numerous schematics and general information that I gathered over the years.
I have stopped using the doppler system for a while and now use the TDOA system http://verbed.home.xs4all.nl/hamspace/pe5edw/TDOA/tdoa5.htm, which gives excellent results in the field. What I want to do with this is to transfer the fore/aft and left/right signals that go to the meters into digital form and calculate a vector that can be shown on a peloris. Like the fore/aft signal is Y-axis and left/right is X-axis (or SINE/COSINE values) and together it can make the angle (Agrelo format output (%122/8<cr>)) that can then maybe used also as an input for your mapping software. Also basic integration routines to stabilize the input signal can be applied once the signals are made into digital form. Anyway, I have not much experience in this area, so maybe you can provide me with some advice.
73, Edwin
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