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ADS-B: Aircraft Tracking Hardware and Software

r/ADSB

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Posted by2 months ago
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Posted by2 days ago

外围体育投注I have a Thomson TCW710 router that I don't use, and I have been wondering if it could be turned somehow into a ADS-B receiver, either hacking it or adding separate hardware.

Sorry if it is a stupid question, but I'm just starting now.

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Posted by2 days ago

外围体育投注I have been tinkering with a cheap SDR and dump1090 with the hopes of an end product that can provide data to a program that calculates the error between GPS height and pressure height. My difficulty is finding a way to get GPS height using dump1090’s output to port 30003 which is in the sbs1 basestation format. The documentation for this format is within this link:

外围体育投注This website states this “BaseStation only displays Barometer altitude but in the data are HAE (height above ellipsoid), which is sent as the difference between GPS altitude and barometric altitude.” Which hints at a way to obtain GPS altitude but I do not see this HAE data anywhere within the messages. I am quite new to ADS-B so I could be overlooking something.

外围体育投注My main goal here is to find a program that uses my SDR to receive ADS-B messages decode them and give me not only the pressure altitude that most programs give but in addition the GPS altitude. If anyone knows a way of accomplishing this it would be much appreciated as it seems manually decoding the ADS-B messages can be a bit of a nightmare.

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Posted by4 days ago

外围体育投注Hey guys, hoping someone might be able to point me in the right direction. I'm trying to figure out the best way to mount a FA24 antenna outside my house. I'm fairly sure the best option I have is an outside shed, and mounting the pi inside, and running the coax out through an air vent and then mounting the antenna on the external wall. It's got reasonably good line of sights and elevation.

The problem that I can see is that there is a substantial "lip" of the roof, and if I mount the antenna flush on the wall then the antenna won't go up past the roofing.

Pic to illustrate -

Any suggestions on how to mount this so that I can get the antenna up as high as possible? FWIW I'm based in Europe, so hoping any of the mounts would be something that I could find locally.

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Posted by4 days ago
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Posted by5 days ago

I wanted to create a ADSB receiver, but like many encountered a few issues that I needed to resolve. The receiver and antenna needed to be mounted around 20m (60 ft) away from the house, and this would incur substantial feeder loss.

The next idea was to mount the Raspberry PI, SDR receiver and antenna very close to the antenna, thus reducing the feeder loss and at 1090 MHz that is significant.

I mounted the Pi and Flight Aware SDR inside a waterproof box. This allowed me to place them directly below the 1090 MHz antenna, with a short 30cm (12inch) coax run.

I selected the Flight Aware SDR receiver, optimised for 1090 MHz with a Low Noise Amplifier and SAW filter onboard. In the tests I completed this outperformed the cheap RTL SDR receivers by around 20% on receiver range.

外围体育投注The next challenge was power, as I wanted to feed 5v from the house, but the 25m (75 feel) power cable run causes significant voltage drop and so I required a DC to DC converter. This was sourced from PIMORONI and listed as as you can feed with 3 to 16v.

外围体育投注I feed it with 12v and its drawing around 400mA of current.

Suggested ADSB antennas can be found . Having something with some gain, and on the correct frequency really makes a difference.

The build notes, pictures and comments are available on my

Dave

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Posted by5 days ago
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Created Aug 1, 2014