VHF ACARS / HFDL (aka 'HF ACARS) 30 August 2019 Update

HFDL is operated by ARINC as the GLOBALink/HF service, with 15 ground stations spread over the globe sending ACARS-like messages from and to aircraft on shortwave frequencies (2-22 MHz). The number of customers is increasing rapidly, with almost 2000 aircraft equipped today! This is a really interesting facet of the radio monitoring hobby.

HFDL Waveform courtesy of Scancat

High Frequency Data Link (HFDL) is an ACARS communications media used to exchange data such as Aeronautical Operational Control (AOC) messages, Controller Pilot Data Link Communications (CPDLC) messages and Automatic Dependent Surveillance (ADS) messages between aircraft end-systems and corresponding ground-based HFDL ground stations. Using the unique propagation characteristics of high-frequency radio waves, the ground stations provide data link communications to properly equipped aircraft operating anywhere in the world. The result, pilots can always communicate with someone on the ground.



Decoders:PC-HFDL Charles Brain Shareware program http://www.chbrain.dircon.co.uk/download/PC-HFDL%202.042%20Setup.zip

HOKA Multimode Commercial Program http://www.hoka.net/

Wavecom Commercial Program http://www.wavecom.ch/

Sorcerer http://www.radioaficion.com/HamNews/archivo/vagabundos-del-dial/5814-sorcerer-decoder.html

Multi-PSK Pro by F6CTE http://f6cte.free.fr/

Sigmira http://www.saharlow.com/technology/sigmira

Display Launcher by Mike Simpson http://www.rstools.info/DL.html

The Display Launched package mentioned above is a must have utility if you are monitoring HFDL, ACARS or GMDSS DSC digital signals. The best part of this utility -- its free! The Display Launcher package includes the following programs:-

1. PC-HFDL-Display - Which extracts the output from PC-HFDL log files and displays it on a grid.
2. ACARS-Display - Which extracts TCPIP data from MultiPSK Pro in VHF Acars mode.
3. HFDL-Display - Which extracts TCPIP data from MultiPSK Pro in HF Acars mode.
4. GMDSS-Display - Which extracts TCPIP shipping data from MultiPSK Pro in GMDSS mode.
5. ACARSD-Display - Which extracts the output from ACARSD log files and displays it on a grid
6. SBS3-ACARS-Display - Extracts TCPIP data from the Kinetics SBS-3 receiver.
7. Tools - Includes a utility to extract aircraft routing data from the PP flight routes forum .sqb files into ‘Flights.txt’ for use with the above aviation programs. Plus a utility to extract Aircraft data from Basestation.sqb

I use the Multipsk Pro/Display Launch package and it works super. You can get more details from the pdf manual located at http://www.rstools.info/Display-Launcher.pdf

Sources / further information:AMCP/5-DP/1 Manual on the implementation of HFDL http://legacy.icao.int/anb/panels/acp/meetings/amcp5/item-1e.pdf
ARINC www.arinc.com
Utility Monitoring Central Decoder Page http://www.chace-ortiz.org/umc/software.html
Utility DXers Forum (UDXF) www.udxf.nl
Utility DXers Website http://www.udxf.nl/ute-info.html
What is HFDL http://www.udxf.nl/What%20Is%20HFDL.pdf

Aircraft tracked using the HFDL mode from a Japanese HFDL monitor blog. Signals centric on east Asia.

Latest HFDL System Table 51 Frequencies Updated 19 Jun 2019

Ground Station ID 1
SAN FRANCISCO - CALIFORNIA
UTC UNLOCKED
Longitude 121 45 33  W  Latitude 38 23 4  N
Squitter Version 0
Number of frequencies 8
Frequency 21934000 Hz Master Frame Slot 4
Frequency 17919000 Hz Master Frame Slot 12
Frequency 13276000 Hz Master Frame Slot 8
Frequency 11327000 Hz Master Frame Slot 4
Frequency 10081000 Hz Master Frame Slot 4
Frequency 8927000 Hz Master Frame Slot 12
Frequency 6559000 Hz Master Frame Slot 8
Frequency 5508000 Hz Master Frame Slot 4

Ground Station ID 2
MOLOKAI - HAWAII
UTC UNLOCKED
Longitude 157 11 11  W  Latitude 21 11 3  N
Squitter Version 0
Number of frequencies 12
Frequency 21937000 Hz Master Frame Slot 0
Frequency 17919000 Hz Master Frame Slot 7
Frequency 13324000 Hz Master Frame Slot 3
Frequency 13312000 Hz Master Frame Slot 3
Frequency 13276000 Hz Master Frame Slot 3
Frequency 11348000 Hz Master Frame Slot 11
Frequency 11312000 Hz Master Frame Slot 11
Frequency 10027000 Hz Master Frame Slot 11
Frequency 8936000 Hz Master Frame Slot 0
Frequency 8912000 Hz Master Frame Slot 0
Frequency 6565000 Hz Master Frame Slot 7
Frequency 5514000 Hz Master Frame Slot 7

Ground Station ID 3
REYKJAVIK - ICELAND
UTC UNLOCKED
Longitude 22 27 19  W  Latitude 63 50 49  N
Squitter Version 0
Number of frequencies 7
Frequency 17985000 Hz Master Frame Slot 11
Frequency 15025000 Hz Master Frame Slot 7
Frequency 11184000 Hz Master Frame Slot 3
Frequency 8977000 Hz Master Frame Slot 0
Frequency 6712000 Hz Master Frame Slot 11
Frequency 5720000 Hz Master Frame Slot 7
Frequency 3900000 Hz Master Frame Slot 3

Ground Station ID 4
RIVERHEAD - NEW YORK
UTC UNLOCKED
Longitude 72 38 14  W  Latitude 40 52 54  N
Squitter Version 0
Number of frequencies 7
Frequency 21931000 Hz Master Frame Slot 1
Frequency 17919000 Hz Master Frame Slot 9
Frequency 13276000 Hz Master Frame Slot 5
Frequency 11387000 Hz Master Frame Slot 1
Frequency 8912000 Hz Master Frame Slot 9
Frequency 6661000 Hz Master Frame Slot 5
Frequency 5652000 Hz Master Frame Slot 1

Ground Station ID 5
AUCKLAND - NEW ZEALAND
UTC UNLOCKED
Longitude 174 48 34  E  Latitude 37 0 55  S
Squitter Version 0
Number of frequencies 6
Frequency 17916000 Hz Master Frame Slot 12
Frequency 13351000 Hz Master Frame Slot 8
Frequency 10084000 Hz Master Frame Slot 4
Frequency 8921000 Hz Master Frame Slot 12
Frequency 6535000 Hz Master Frame Slot 8
Frequency 5583000 Hz Master Frame Slot 4

Ground Station ID 6
HAT YAI - THAILAND
UTC UNLOCKED
Longitude 100 23 18  E  Latitude 6 56 15  N
Squitter Version 0
Number of frequencies 7
Frequency 21949000 Hz Master Frame Slot 10
Frequency 17928000 Hz Master Frame Slot 6
Frequency 13270000 Hz Master Frame Slot 2
Frequency 10066000 Hz Master Frame Slot 10
Frequency 8825000 Hz Master Frame Slot 6
Frequency 6535000 Hz Master Frame Slot 2
Frequency 5655000 Hz Master Frame Slot 10

Ground Station ID 7
SHANNON - IRELAND
UTC UNLOCKED
Longitude 8 55 35  W  Latitude 52 44 38  N
Squitter Version 0
Number of frequencies 8
Frequency 11384000 Hz Master Frame Slot 2
Frequency 10081000 Hz Master Frame Slot 2
Frequency 8942000 Hz Master Frame Slot 6
Frequency 8843000 Hz Master Frame Slot 6
Frequency 6532000 Hz Master Frame Slot 10
Frequency 5547000 Hz Master Frame Slot 2
Frequency 3455000 Hz Master Frame Slot 6
Frequency 2998000 Hz Master Frame Slot 6

Ground Station ID 8
JOHANNESBURG - SOUTH AFRICA
UTC UNLOCKED
Longitude 28 12 21  E  Latitude 26 7 45  S
Squitter Version 0
Number of frequencies 8
Frequency 21949000 Hz Master Frame Slot 10
Frequency 17922000 Hz Master Frame Slot 6
Frequency 13321000 Hz Master Frame Slot 2
Frequency 11321000 Hz Master Frame Slot 10
Frequency 8834000 Hz Master Frame Slot 6
Frequency 5529000 Hz Master Frame Slot 10
Frequency 4681000 Hz Master Frame Slot 6
Frequency 3016000 Hz Master Frame Slot 6

Ground Station ID 9
BARROW - ALASKA
UTC UNLOCKED
Longitude 156 34 37  W  Latitude 71 15 30  N
Squitter Version 0
Number of frequencies 19
Frequency 21937000 Hz Master Frame Slot 10
Frequency 21928000 Hz Master Frame Slot 10
Frequency 17934000 Hz Master Frame Slot 6
Frequency 17919000 Hz Master Frame Slot 6
Frequency 11354000 Hz Master Frame Slot 2
Frequency 10093000 Hz Master Frame Slot 2
Frequency 10027000 Hz Master Frame Slot 2
Frequency 8936000 Hz Master Frame Slot 10
Frequency 8927000 Hz Master Frame Slot 10
Frequency 6646000 Hz Master Frame Slot 6
Frequency 5544000 Hz Master Frame Slot 2
Frequency 5538000 Hz Master Frame Slot 2
Frequency 5529000 Hz Master Frame Slot 2
Frequency 4687000 Hz Master Frame Slot 2
Frequency 4654000 Hz Master Frame Slot 2
Frequency 3497000 Hz Master Frame Slot 10
Frequency 3007000 Hz Master Frame Slot 10
Frequency 2992000 Hz Master Frame Slot 10
Frequency 2944000 Hz Master Frame Slot 10

Ground Station ID 10
MUAN - SOUTH KOREA
UTC UNLOCKED
Longitude 126 14 19  E  Latitude 35 1 56  N
Squitter Version 0
Number of frequencies 8
Frequency 21931000 Hz Master Frame Slot 3
Frequency 17958000 Hz Master Frame Slot 11
Frequency 13342000 Hz Master Frame Slot 7
Frequency 10060000 Hz Master Frame Slot 3
Frequency 8939000 Hz Master Frame Slot 11
Frequency 6619000 Hz Master Frame Slot 7
Frequency 5502000 Hz Master Frame Slot 3
Frequency 2941000 Hz Master Frame Slot 7

Ground Station ID 11
ALBROOK - PANAMA
UTC UNLOCKED
Longitude 79 22 25  W  Latitude 9 5 4  N
Squitter Version 0
Number of frequencies 6
Frequency 17901000 Hz Master Frame Slot 6
Frequency 13264000 Hz Master Frame Slot 2
Frequency 10063000 Hz Master Frame Slot 10
Frequency 8894000 Hz Master Frame Slot 6
Frequency 6589000 Hz Master Frame Slot 2
Frequency 5589000 Hz Master Frame Slot 10

Ground Station ID 13
SANTA CRUZ - BOLIVIA
UTC UNLOCKED
Longitude 63 9 24  W  Latitude 17 40 15  S
Squitter Version 0
Number of frequencies 7
Frequency 21997000 Hz Master Frame Slot 3
Frequency 17916000 Hz Master Frame Slot 11
Frequency 13315000 Hz Master Frame Slot 7
Frequency 11318000 Hz Master Frame Slot 3
Frequency 8957000 Hz Master Frame Slot 11
Frequency 6628000 Hz Master Frame Slot 7
Frequency 4660000 Hz Master Frame Slot 3

Ground Station ID 14
KRASNOYARSK - RUSSIA
UTC UNLOCKED
Longitude 92 35 0  E  Latitude 56 9 9  N
Squitter Version 0
Number of frequencies 7
Frequency 21990000 Hz Master Frame Slot 4
Frequency 17912000 Hz Master Frame Slot 12
Frequency 13321000 Hz Master Frame Slot 8
Frequency 10087000 Hz Master Frame Slot 4
Frequency 8886000 Hz Master Frame Slot 12
Frequency 6596000 Hz Master Frame Slot 8
Frequency 5622000 Hz Master Frame Slot 4

Ground Station ID 15
AL MUHARRAQ - BAHRAIN
UTC UNLOCKED
Longitude 50 38 23  E  Latitude 26 16 25  N
Squitter Version 0
Number of frequencies 6
Frequency 21982000 Hz Master Frame Slot 1
Frequency 17967000 Hz Master Frame Slot 9
Frequency 13354000 Hz Master Frame Slot 5
Frequency 10075000 Hz Master Frame Slot 1
Frequency 8885000 Hz Master Frame Slot 9
Frequency 5544000 Hz Master Frame Slot 5

Ground Station ID 16
AGANA - GUAM
UTC UNLOCKED
Longitude 144 49 41  E  Latitude 13 29 19  N
Squitter Version 0
Number of frequencies 7
Frequency 21928000 Hz Master Frame Slot 1
Frequency 17919000 Hz Master Frame Slot 9
Frequency 13312000 Hz Master Frame Slot 5
Frequency 11306000 Hz Master Frame Slot 1
Frequency 8927000 Hz Master Frame Slot 5
Frequency 6652000 Hz Master Frame Slot 1
Frequency 5451000 Hz Master Frame Slot 9

Ground Station ID 17
CANARIAS - SPAIN
UTC UNLOCKED
Longitude 15 24 18  W  Latitude 27 57 39  N
Squitter Version 0
Number of frequencies 6
Frequency 21955000 Hz Master Frame Slot 4
Frequency 17928000 Hz Master Frame Slot 12
Frequency 13303000 Hz Master Frame Slot 8
Frequency 11348000 Hz Master Frame Slot 4
Frequency 8948000 Hz Master Frame Slot 12
Frequency 6529000 Hz Master Frame Slot 8

VHF ACARS Frequencies

Freq. (MHz) Mode  Area
129.125 ACARS USA & Canada
130.025 ACARS USA & Canada
130.425 ACARS USA
130.450 ACARS USA & Canada
131.125 ACARS USA
131.450 ACARS Primary channel Japan
131.475 ACARS Air Canada company channel
131.525 ACARS Secondary Europe
131.550 ACARS Primary Channel worldwide
131.725 ACARS Primary channel in Europe
131.825 ACARS Additional channel Europe
131.850 ACARS Additional channel Europe
136.700 ACARS Additional channel USA
136.750 ACARS Additional channel USA & Europe
136.800 ACARS Additional channel USA
136.850 ACARS SITA North American Frequency
136.875 VDL2 Europe
136.900 ACARS SITA Secondary channel Europe
136.925 ACARS ARINC channel Europe
136.975 VDL2 Europe
1030.000 Mode-S Interrogation frequency
1090.000 Mode-S Reply frequency