#hfdl — Public Fediverse posts

Exploring Aviation Signals: Gander VOLMET Meets HFDL on 13270 kHz

https://swling.com/blog/2024/11/exploring-aviation-signals-gander-volmet-meets-hfdl-on-13270-khz/

#EgilLA2PJ #Gander #HFDL #VOLMET

My #HFDL feed is still working well. Monitoring about 20 different HF frequencies in parallel from 5-25MHz 24/7 on a single #HackRF SDR fed off a Magnetic Loop antenna orientated for max RF East/West. Since a very local MW station (Absolute Radio) has gone QRT I might now consider removing the MW bandstop filter I had to use to reduce intermods on my multiple #KiwiSDRs and HF receivers.

Made some improvements with the #HFDL receive config. I was even able to receive flights connecting to Hawaii’s ground station today. However most cross Atlantic flights even those over the US are connecting mostly to Shannon. Almost as if they are intelligently picking ground stations that are in front of them rather than directly next to them (or underneath them). Or maybe the lower freqs decode better in the night path than the higher freqs in daylight path. Dunno. That’s the fun with HF. 🤷‍♂️

Screenshot paste fail.
Sorry, you got double UK and no USA in that last post.
I'm blaming only had my first coffee for the day?
Again, no #ADSB, all #ACARS with some floobydust #ADSC over the ocean and a few #HFDL

As #HFDL use drops off vs #adsb I imagine it's not priority to update them or they get missed?

Ping @thebaldgeek @alex anyway for input. Probably not worth caring about but for mixed mode aggregators it means tracks get broken between hexes when switching coverage mode

I had an old Raspberry Pi, a RTL based SDR and an antenna that can be best described as a bit of wet string. But the results are incredibly satisfying. (Receiving 1090MHz ADSB signals from aircraft around my home). After playing with that for a while I thought as I’m also massively into HF I would try the same with HFDL ACARS. Sadly it appears that aircraft using HFDL don’t send a great amount of positional info and hardly ever an altitude, heading or speed. Now researching L-Band 😁 #HFDL #ACARS

Using the split node in #nodered I was able to breakout each of the ground stations 'Frequency in use' on the #hfdl #ACARS mode.
Now looking at using this data on a 'back control' data channel so we only tune to and listen on those frequencies that are in actual use.

I think #avgeek dashboard layouts and #nodered go hand in hand.
I just now rehashed my #HFDL #ACARS page.
I have added more than a few feeds of late and the page was suffering a bit of GUI rot as a result.
So, this is the current layout.
Of course you can hit the page up yourself and check it out, but yeah, more functional now I think.

Gave our Ireland and Australia #HFDL stations some love this morning with updated scripts and split frequency scanning.
Was totally worth it.
Tracking 588 aircraft just now.
Pretty cool, but keep in mind that aircraft on a map are less than half of the story. The real data is on my site and @airframes website.....

@w8emv @[email protected] @ADSBexchange Yes, in regards to acarsdec, most people use a #FlightAware Orange or more preferably an #adsbexchange Orange stick. Last resort is an #RTLSDR stick, but it works.

I don't believe anyone uses an #airspy HF+ because that is for HF (a totally different band).

You could use that for #HFDL though, which @airframes has an ingest for.

@thebaldgeek any thoughts?