6662 khz USB

[PresentedIn4D]

High pitched tone then data bursts. Similar to STANAG digital modes.
Recording: Weird Data 6662USB by Presentedin4D on SoundCloud - Create, record and share your sounds for free
This has been playing all day.

 

[brandon]

That sounds like HFDL
HFDL - The RadioReference Wiki

 

[PresentedIn4D]

Interesting. Thanks for that. Turns out there is a station a few hundred miles south of me in Long Island.

 

[Saint]

Hfdl

High pitched tone then data bursts. Similar to STANAG digital modes.
Recording: Weird Data 6662USB by Presentedin4D on SoundCloud - Create, record and share your sounds for free
This has been playing all day.

01:56:20 UTC This is HFDL bursts, it's loud and clear right now, I also used a HFDL decoder and it decodes perfect.
Steve

 

[PresentedIn4D]

I don't have any good decoder for my computer (there are none, other than MultiMode as far as I know, which I have no money)
What traffic does it carry? I'm guessing it's aeronautical, but I could be wrong.

 

[Saint]

PC'HFDL Software

I don't have any good decoder for my computer (there are none, other than MultiMode as far as I know, which I have no money)
What traffic does it carry? I'm guessing it's aeronautical, but I could be wrong.

I just tried my decoder and it expired and I need to buy it so it's in the garbage can, sorry I can't help you with decoding.
Steve

Steve

 

[ww7y]

I just tried my decoder and it expired and I need to buy it so it's in the garbage can, sorry I can't help you with decoding.
Steve

Steve

This is New York on 6661 USB. HFDL can carry lots of different types of Aero traffic but is used mainly for position reports. Not all airlines use the system but many do. You may see all kinds of air/ground messages in the text. Charles Brain's program PC-HFDL(reasonably priced with free eval period) works great for decoding and can use Google Earth to plot positions of the aircraft in real time. There are several HFDL stations around the world and as conditions change, many can be received.

 

[Saint]

HFDL Frequency

Here is another HFDL Frequency that is really busy for anyone who is interested,
5.6520 MHz USB Riverhead NY HFDL
Steve

 

[SCPD]

Im getting the data bursts at different signal strengths. Some bursts I am hardly able to hear while others come in like S-9+ and blow my ears off. There must be mutiple transmitting sites that are sounding.

 

[majoco]

Of course!

The local ground station sends his identifier in his allocated block. Aircraft will reply in sync with the ground station. They will be at varying distances and altitudes so the signal strength will vary from "blow-yer-socks-off" to almost nothing.

An earlier PC-HFDL is still available without the bells and whistles which doesn't 'time-expire'.

 

[kb9gig]

6662 khz USB HFDL

this is a samplef what i was decoding on that freq.


<300 bps 1.8 sec 1459 Hz> 03/30/2011 08:48:11
CRC control: OK
MPDU (Media access control Protocol Data Unit) - Uplink
00 Ground Station Identifier: 4 - Riverhead, NEW YORK, USA (072-38-22W 40-52-47N) Synchronized to UTC time
01 Number of aircrafts: 1
--> Aircraft: 1
02 Aircraft Identifier: 255
03 Downlink data rate: 300 bits/s
04 Number of LPDU: 1 LPDU Sizes: 10
LPDU CRC control: OK
[LPDU log-on confirm] Aircraft ICAO address (hex): A7A9CD Aircraft Identifier: 29 K=0 D(R): 0 [ D(R) Vect + 1..8 ]: 00000000

also multipsk ver 4.19 has the HFDL decoder that works very well.

also here is a list of some hfdl frequencies.i have logged

Ground Station ID 1
San Francisco CALIFORNIA, USA (121-45-34W 38-22-48N)
Number of frequencies 10
21934000 Hz Slot 4
17919000 Hz Slot 12
13276000 Hz Slot 8
11327000 Hz Slot 4
10081000 Hz Slot 4
8927000 Hz Slot 12
6559000 Hz Slot 8
5508000 Hz Slot 4
4672000 Hz Slot 4
2947000 Hz Slot 12

Ground Station ID 2
Molokai, HAWAII, USA (157-10-46W 21-10-47N)
Number of frequencies 20
21937000 Hz Slot 0
21928000 Hz Slot 0
17934000 Hz Slot 7
17919000 Hz Slot 7
13324000 Hz Slot 3
13312000 Hz Slot 3
13276000 Hz Slot 3
11348000 Hz Slot 11
11312000 Hz Slot 11
10081000 Hz Slot 11
8936000 Hz Slot 1
8912000 Hz Slot 1
6565000 Hz Slot 0
6559000 Hz Slot 0
5514000 Hz Slot 7
5463000 Hz Slot 7
4687000 Hz Slot 7
hope this helps
john:

 

[ka3jjz]

We have a reasonably complete list of stations and frequencies here; there likely has been some changes since the table was modified last year, but should still be mostly correct;

HFDL - The RadioReference Wiki

If someone would post the changes I can update the table Mike

 

[Intellifax]

this is a samplef what i was decoding on that freq.


<300 bps 1.8 sec 1459 Hz> 03/30/2011 08:48:11
CRC control: OK
MPDU (Media access control Protocol Data Unit) - Uplink
00 Ground Station Identifier: 4 - Riverhead, NEW YORK, USA (072-38-22W 40-52-47N) Synchronized to UTC time
01 Number of aircrafts: 1
--> Aircraft: 1
02 Aircraft Identifier: 255
03 Downlink data rate: 300 bits/s
04 Number of LPDU: 1 LPDU Sizes: 10
LPDU CRC control: OK
[LPDU log-on confirm] Aircraft ICAO address (hex): A7A9CD Aircraft Identifier: 29 K=0 D(R): 0 [ D(R) Vect + 1..8 ]: 00000000

That was for a Delta-owned (formerly Northwest) B-757, N593NW.

 

[Jimepage]

Yea I just gave sigmira a tryout but if doesnt detect my soundcard