HFDL – KC-135?

Today I received two HFDL messages from Reykjavik to, apparently, a KC-135:

[2022-04-06 16:08:05 GMT] [17985.0 kHz] [-5.4 Hz] [-42.3/-52.7 dBFS] [10.4 dB] [300 bps] [S]
Uplink LPDU:
Src GS: Reykjavik, Iceland
Dst AC: 255
Type: Logon confirm
ICAO: AE07C0
AC info: 63-8006, Boeing, KC-135R, United States Air Force
Assigned AC ID: 33

[2022-04-06 16:10:13 GMT] [17985.0 kHz] [-5.9 Hz] [-44.5/-53.5 dBFS] [9.0 dB] [300 bps] [D]
Uplink LPDU:
Src GS: Reykjavik, Iceland
Dst AC: 255
Type: Logon confirm
ICAO: AE07C0
AC info: 63-8006, Boeing, KC-135R, United States Air Force
Assigned AC ID: 33

When checking the HEX on adsbexchange the aircraft was active as SABRE36 overhead Texas. A bit odd… but the HFDL data seems to be correct, and it was also received twice. So, my first KC-135 on HFDL I think…

And also so more remarkable data:

[2022-04-06 07:11:45.527 GMT] [8977.0 kHz] [2.4 Hz] [-32.1/-40.2 dBFS] [8.1 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 255
Dst GS: Reykjavik, Iceland
Type: Logon resume
ICAO: 3F9A92
AC info: 15+03, Airbus, ACJ319 133X, German Air Force
Frequency data:
Flight ID: OSY11D
Lat: 44.5561687
Lon: 26.1533473
Time: 07:11:40
GS ID: Reykjavik, Iceland
Listening on: 17985.0, 8977.0, 6712.0, 5720.0, 3900.0
Heard on: 8977.0
GS ID: Molokai, Hawaii
Listening on: 21937.0, 13324.0, 11348.0, 11312.0, 10027.0, 8936.0, 8912.0
Heard on:
GS ID: Agana, Guam
Listening on: 21928.0, 17919.0, 13312.0, 11306.0, 8927.0, 6652.0, 5451.0
Heard on:
GS ID: Riverhead, New York
Listening on: 21931.0, 17919.0, 13276.0, 11387.0, 8912.0, 6661.0, 5652.0
Heard on:
GS ID: Al Muharraq, Bahrain
Listening on: 21982.0, 17967.0, 13354.0, 10075.0, 8885.0, 5544.0
Heard on:
GS ID: Hat Yai, Thailand
Listening on: 13270.0, 8825.0, 6535.0, 5655.0
Heard on:

OSY used to be the Open Skies callsign / flight ID. And indeed 15+03 was the German Open Skies aircraft. But I don’t think there are still Open Skies missions. And then this data also appeared:

[2022-04-06 11:37:04 GMT] [17928.0 kHz] [4.1 Hz] [-44.3/-50.4 dBFS] [6.1 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 169
Dst GS: Canarias, Spain
Type: Unnumbered ack’ed data
Enveloped data:
ACARS:
Reassembly: skipped
Reg: …1503 Flight: LH011D
Mode: 2 Label: Q0 Blk id: 6 More: 0 Ack: ! Msg num: S22A

This seems to point to a flight ID of LH011D which makes more sense related to GAF VIP aircraft.

HFDL – Src GS: Hat Yai

[2022-04-05 21:21:09.220 GMT] [13270.0 kHz] [0.9 Hz] [-32.6/-35.6 dBFS] [3.0 dB] [300 bps] [S]
Uplink SPDU:
Src GS: Hat Yai, Thailand
Squitter: ver: 0 rls: 0 iso: 0
Change note: None
TDMA Frame: index: 2402 offset: 2
Minimum priority: 0
System table version: 51
Ground station status:
ID: Hat Yai, Thailand
UTC sync: 1
Frequencies in use: 21949.0, 13270.0
ID: Krasnoyarsk, Russia
UTC sync: 1
Frequencies in use: 6596.0
ID: Al Muharraq, Bahrain
UTC sync: 1
Frequencies in use: 17967.0, 10075.0

[2022-04-05 21:26:06.939 GMT] [13270.0 kHz] [1.4 Hz] [-31.3/-35.1 dBFS] [3.8 dB] [300 bps] [S]
Uplink LPDU:
Src GS: Hat Yai, Thailand
Dst AC: 255
Type: Logon confirm
ICAO: 76CC63
AC info: 9V-SCC, Boeing, 787 10, Singapore Airlines
Assigned AC ID: 148

[2022-04-05 22:30:09.435 GMT] [13270.0 kHz] [7.8 Hz] [-33.1/-34.9 dBFS] [1.8 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 255
Dst GS: Hat Yai, Thailand
Type: Logon resume
ICAO: 06A101
AC info: A7-ALM, Airbus, A350 941, Qatar Airways
Frequency data:
Flight ID: QTR945
Lat: 13.0871450
Lon: 77.4046658
Time: 22:30:04
GS ID: Hat Yai, Thailand
Listening on: 21949.0
Heard on:
GS ID: Reykjavik, Iceland
Listening on: 17985.0, 15025.0, 8977.0
Heard on: 8977.0
GS ID: Molokai, Hawaii
Listening on: 21937.0, 13324.0, 10027.0
Heard on: 21937.0
GS ID: Agana, Guam
Listening on: 21928.0, 13312.0, 11306.0, 8927.0
Heard on:
GS ID: Muan, South Korea
Listening on: 17958.0, 13342.0, 10060.0, 8939.0
Heard on:
GS ID: Canarias, Spain
Listening on: 21955.0, 17928.0, 13303.0
Heard on:

[2022-04-05 23:46:35.357 GMT] [13270.0 kHz] [-10.5 Hz] [-30.8/-34.3 dBFS] [3.6 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 255
Dst GS: Hat Yai, Thailand
Type: Logon resume
ICAO: 8963F2
AC info: A6-EOU, Airbus, A380 861, Emirates Airline
Frequency data:
Flight ID: UAE13U
Lat: 38.5806247
Lon: 42.9250391
Time: 23:46:30
GS ID: Hat Yai, Thailand
Listening on: 13270.0, 6535.0, 5655.0
Heard on: 13270.0
GS ID: Reykjavik, Iceland
Listening on: 17985.0, 15025.0, 11184.0, 8977.0, 5720.0, 3900.0
Heard on: 8977.0
GS ID: Molokai, Hawaii
Listening on: 21937.0, 17919.0, 13324.0, 13276.0, 11348.0, 11312.0, 10027.0, 8936.0, 8912.0, 6565.0, 5514.0
Heard on:
GS ID: Agana, Guam
Listening on: 21928.0, 17919.0, 13312.0, 11306.0, 8927.0, 6652.0, 5451.0
Heard on:
GS ID: Riverhead, New York
Listening on: 21931.0, 17919.0, 13276.0, 11387.0, 8912.0, 6661.0, 5652.0
Heard on: 13276.0
GS ID: Al Muharraq, Bahrain
Listening on: 21982.0, 17967.0, 13354.0, 10075.0, 8885.0, 5544.0
Heard on:

HFDL – C-5M

Besides USAF KC-46 and C-17, also C-5M are active on HFDL:

[2022-04-03 18:01:41 GMT] [17985.0 kHz] [-5.7 Hz] [-40.0/-54.3 dBFS] [14.3 dB] [300 bps] [S]
Uplink LPDU:
Src GS: Reykjavik, Iceland
Dst AC: 255
Type: Logon confirm
ICAO: AE0585
AC info: 87-0040, Lockheed, C-5M Galaxy, United States Air Force
Assigned AC ID: 181

HFDL – Dst GS: San Francisco

My first HFDL log in which San Francisco actually pops-up:

[2022-04-03 16:51:22 GMT] [17919.0 kHz] [5.0 Hz] [-50.7/-53.5 dBFS] [2.8 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 114
Dst GS: San Francisco, California
Type: Unnumbered ack’ed data
Enveloped data:
ACARS:
Reassembly: skipped
Reg: .N862FD Flight: FX9605
Mode: 2 Label: SA Blk id: 5 More: 0 Ack: ! Msg num: S98A
Message:
0EH164812VHS
Media Advisory, version 0:
Link HF established at 16:48:12 UTC
Available links: VHF ACARS, HF, Default SATCOM

Not much of a message but it’s a start!

A few days earlier another first time: Dst GS: Auckland, New Zealand!

[2022-04-01 18:37:44 GMT] [6535.0 kHz] [-1.3 Hz] [-30.8/-34.9 dBFS] [4.1 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 255
Dst GS: Auckland, New Zealand
Type: Logon resume
ICAO: 740823
AC info: JY-BAC, Boeing, 787 8, Royal Jordanian Airlines
Frequency data:
Flight ID: RJA112
Lat: 43.0922376
Lon: 17.1967262
Time: 18:37:40
GS ID: Auckland, New Zealand
Listening on: 17916.0, 13351.0, 6535.0, 5583.0
Heard on: 6535.0
GS ID: Reykjavik, Iceland
Listening on: 17985.0, 15025.0, 11184.0, 8977.0, 6712.0
Heard on:
GS ID: Molokai, Hawaii
Listening on: 21937.0, 13324.0, 13312.0, 13276.0, 11312.0, 10027.0, 8936.0, 8912.0, 6565.0, 5514.0
Heard on:
GS ID: Agana, Guam
Listening on: 17919.0, 13312.0, 11306.0, 8927.0, 6652.0, 5451.0
Heard on: 11306.0
GS ID: Shannon, Ireland
Listening on: 10081.0, 8942.0, 6532.0, 3455.0, 2998.0
Heard on: 10081.0, 8942.0
GS ID: Hat Yai, Thailand
Listening on: 21949.0, 13270.0, 5655.0
Heard on:

Really? IVO Serbia trying to establishing a link with Auckland NZ? April fools maybe?

HFDL

On this page I will share my insights and experience with the High Frequency Datalink (HFDL) system. I am not by any standard an expert on this subject so please also check what’s out there on the internet, for example on http://udxf.nl/modes.html or in groups like https://acars-vdl2.groups.io/g/HFDL.

Besides an antenna and radio or SDR that is able to receive HF you will also need software to decode HFDL. A popular Windows based program is PC-HFDL and for Linux DumpHFDL is often used. The latter is the program I use with an AirspyHF+ Discovery SDR and a Raspberry Pi4. DumpHFDL is also part of the excellent DragonOS Raspberry Pi OS.

The information below is based on output generated by DumpHFDL.

HFDL message composition

There are several types of messages on HFDL. I only detail the basic information on this page so it is very well possible you see other messages also. But the main information that is visible in decoded HFDL messages is available in the messages below. I have added my remarks in red:

For the reception details HFDL see here.

But you can also see other messages in which the basis composition is the same but in which additional messages or information is included like:

[2022-03-31 06:55:10 GMT] [10081.0 kHz] [3.7 Hz] [-31.9/-38.6 dBFS] [6.7 dB] [600 bps] [D]
Downlink LPDU:
Src AC: 142
Dst GS: Shannon, Ireland
Type: Unnumbered ack’ed data
Enveloped data:
ACARS:
Reassembly: skipped
Reg: RA73100 Flight: SU1443
Mode: 2 Label: 26 Blk id: 7 More: 0 Ack: ! Msg num: M61A
Message:
ETA01AFL1443 /31310419UIIIUUEE
FUEL 116
TEMP- 2
WDIR24023
WSPD 68
LATN 63.852
LONE 82.529
ETA0808
TUR
ALT34000

DumpHFDL script

The sh script I use to activate DumpHFDL on the RPi is as follows:

dumphfdl –soapysdr driver=airspyhf –sample-rate 256000 11184 11306 11312 11318 11321 11348 11354 11384 11387 –output decoded:text:file:path=/home/ubuntu/dumphfdl_files/hfdl_logs/hfdl.log,rotate=daily –utc –prettify-xml –system-table /usr/src/dumphfdl/etc/systable.conf –system-table-save systable-new.conf –bs-db /home/ubuntu/dumphfdl_files/basestation_db/basestation.sqb –ac-details verbose –output decoded:text:udp:address=192.XXX.XXX.130,port=30099

I have similar files for all the HFDL frequency bands. Ofcourse the UDP address should reflect the actual IP address that you want the HFDL data to be sent to. If you don’t use this then delete the complete –output line.

Ground station frequencies

The current system table for HFDL is Version 51 as can also be found in files section of the earlier mentioned groups.io HFDL group. Depending on the bandwidth of your radio or SDR these frequencies can be added to the sh files that activate DumpHFDL. I use an RTL-SDR V3 for HFDL and this means that I can roughly fit frequencies within a MHz in a single file. So I have files for 3, 5, 6, 8 MHz etc. that I use.

System table version 51.

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

Spotflight – CTM104

A French Air Force A330 with destination FMCZ as heard on HFDL:

[2022-03-31 20:58:00.960 GMT] [8977.0 kHz] [-1.7 Hz] [-29.7/-35.7 dBFS] [6.0 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 255
Dst GS: Reykjavik, Iceland
Type: Logon resume
ICAO: 3B7544
AC info: F-UJCS, Airbus, A330 243, French Air Force
Frequency data:
Flight ID: CTM104
Lat: 41.2365746
Lon: 12.5910427
Time: 20:57:56
GS ID: Reykjavik, Iceland
Listening on: 17985.0, 15025.0, 11184.0, 8977.0, 5720.0, 3900.0
Heard on: 17985.0, 15025.0, 8977.0
GS ID: Molokai, Hawaii
Listening on: 21937.0, 13324.0, 13312.0, 13276.0, 11348.0, 11312.0, 10027.0, 8936.0, 8912.0, 6565.0, 5514.0
Heard on:
GS ID: Agana, Guam
Listening on: 21928.0, 17919.0, 11306.0, 8927.0, 6652.0, 5451.0
Heard on: 11306.0
GS ID: Riverhead, New York
Listening on: 17919.0, 13276.0, 8912.0, 5652.0
Heard on: 13276.0
GS ID: Hat Yai, Thailand
Listening on: 21949.0, 13270.0, 10066.0, 8825.0, 6535.0, 5655.0
Heard on:
GS ID: Shannon, Ireland
Listening on: 11384.0, 10081.0, 8843.0, 6532.0, 5547.0, 3455.0, 2998.0
Heard on: 10081.0

HFDL – RCH502

And my first C-17 on HFDL:

[2022-03-30 17:06:54 GMT] [10081.0 kHz] [6.0 Hz] [-31.8/-46.4 dBFS] [14.6 dB] [300 bps] [D]
Uplink LPDU:
Src GS: Shannon, Ireland
Dst AC: 255
Type: Logon confirm
ICAO: AE119C
AC info: 03-3119, Boeing, C-17A Globemaster III, United States Air Force
Assigned AC ID: 18

[2022-03-30 13:54:00 GMT] [10081.0 kHz] [6.2 Hz] [-22.1/-35.6 dBFS] [13.4 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 24 (AE119C)
AC info: 03-3119, Boeing, C-17A Globemaster III, United States Air Force
Dst GS: Shannon, Ireland
Type: Unnumbered data
Performance data:
Version: 2
Flight ID: MCFAMC
Lat: 52.8724916
Lon: 2.7105383
Time: 13:53:52
Flight leg: 227
GS ID: Shannon, Ireland
Frequency: 8942.0
Frequency search count:
This leg: 11
Prev leg: 0
HFDL disabled duration:
This leg: 412 sec
Prev leg: 0 sec
MPDUs received : 300 bps: 25 600 bps: 4 1200 bps: 0 1800 bps: 0
MPDUs received with errors : 300 bps: 0 600 bps: 0 1200 bps: 0 1800 bps: 0
MPDUs transmitted : 300 bps: 0 600 bps: 1 1200 bps: 0 1800 bps: 0
MPDUs delivered : 300 bps: 0 600 bps: 1 1200 bps: 0 1800 bps: 0
SPDUs received: 37
SPDUs missed: 0
Last frequency change cause: 7 (No change)

[2022-03-30 14:04:01 GMT] [10081.0 kHz] [-0.2 Hz] [-15.0/-36.1 dBFS] [21.2 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 24 (AE119C)
AC info: 03-3119, Boeing, C-17A Globemaster III, United States Air Force
Dst GS: Shannon, Ireland
Type: Unnumbered data
Performance data:
Version: 2
Flight ID: MCFAMC
Lat: 52.4011086
Lon: 4.8123642
Time: 14:03:54
Flight leg: 227
GS ID: Shannon, Ireland
Frequency: 8942.0
Frequency search count:
This leg: 11
Prev leg: 0
HFDL disabled duration:
This leg: 412 sec
Prev leg: 0 sec
MPDUs received : 300 bps: 41 600 bps: 5 1200 bps: 0 1800 bps: 0
MPDUs received with errors : 300 bps: 0 600 bps: 0 1200 bps: 0 1800 bps: 0
MPDUs transmitted : 300 bps: 1 600 bps: 1 1200 bps: 0 1800 bps: 0
MPDUs delivered : 300 bps: 1 600 bps: 1 1200 bps: 0 1800 bps: 0
SPDUs received: 56
SPDUs missed: 0
Last frequency change cause: 7 (No change)

The aircraft is also up on L-band as RCH502 inbound ETAD or ETAR.

HFDL – PICO61

[2022-03-30 16:24:51 GMT] [10081.0 kHz] [5.9 Hz] [-39.1/-44.8 dBFS] [5.7 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 255
Dst GS: Shannon, Ireland
Type: Logon request (DLS)
ICAO: AE5F9F
AC info: 18-46052, Boeing, KC-46A Pegasus, United States Air Force
Frequency data:
Flight ID:
Lat: 51.7367778
Lon: -0.0003433
Time: 16:24:48
GS ID: Shannon, Ireland
Listening on: 10081.0, 2998.0
Heard on: 10081.0, 2998.0

[2022-03-30 16:25:18 GMT] [10081.0 kHz] [6.0 Hz] [-34.0/-44.2 dBFS] [10.1 dB] [300 bps] [S]
Uplink LPDU:
Src GS: Shannon, Ireland
Dst AC: 255
Type: Logon confirm
ICAO: AE5F9F
AC info: 18-46052, Boeing, KC-46A Pegasus, United States Air Force
Assigned AC ID: 224

[2022-03-30 16:39:52 GMT] [10081.0 kHz] [5.3 Hz] [-21.6/-42.8 dBFS] [21.2 dB] [600 bps] [S]
Downlink LPDU:
Src AC: 224 (AE5F9F)
AC info: 18-46052, Boeing, KC-46A Pegasus, United States Air Force
Dst GS: Shannon, Ireland
Type: Unnumbered data
Performance data:
Version: 146
Flight ID: MCCO61
Lat: 52.1274798
Lon: 3.3638828
Time: 16:39:48
Flight leg: 198
GS ID: Shannon, Ireland
Frequency: 8942.0
Frequency search count:
This leg: 1
Prev leg: 0
HFDL disabled duration:
This leg: 0 sec
Prev leg: 20 sec
MPDUs received : 300 bps: 21 600 bps: 5 1200 bps: 0 1800 bps: 0
MPDUs received with errors : 300 bps: 1 600 bps: 1 1200 bps: 0 1800 bps: 0
MPDUs transmitted : 300 bps: 4 600 bps: 0 1200 bps: 0 1800 bps: 0
MPDUs delivered : 300 bps: 3 600 bps: 0 1200 bps: 0 1800 bps: 0
SPDUs received: 27
SPDUs missed: 0
Last frequency change cause: 0 (First freq. search in this flight leg)

HFDL DX 28MAR22

[2022-03-28 03:41:00 GMT] [10063.0 kHz] [3.9 Hz] [-31.9/-35.1 dBFS] [3.1 dB] [300 bps] [S]
Uplink LPDU:
Src GS: Albrook, Panama
Dst AC: 255
Type: Logon confirm
ICAO: A05629
AC info: N12006, BOEING, 787-10, United Airlines Inc
Assigned AC ID: 3

[2022-03-28 03:45:38 GMT] [10063.0 kHz] [3.7 Hz] [-33.5/-35.2 dBFS] [1.7 dB] [300 bps] [D]
Uplink LPDU:
Src GS: Albrook, Panama
Dst AC: 255
Type: Logon confirm
ICAO: A682F2
AC info: N519AV, AIRBUS, A319-115, Wilmington Trust Co Trustee
Assigned AC ID: 14

[2022-03-28 11:04:14 GMT] [17958.0 kHz] [1.3 Hz] [-47.5/-50.7 dBFS] [3.2 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 255
Dst GS: Muan, South Korea
Type: Logon resume
ICAO: 89647F
AC info: A6-EUU, Airbus, A380 842, Emirates Airline
Frequency data:
Flight ID: UAE13E
Lat: 69.9397849
Lon: 66.9353617
Time: 11:04:10
GS ID: Muan, South Korea
Listening on: 21931.0, 17958.0, 13342.0, 10060.0, 8939.0, 6619.0, 2941.0
Heard on: 17958.0, 13342.0
GS ID: Molokai, Hawaii
Listening on: 21937.0, 17919.0, 13324.0, 13312.0, 11312.0, 10027.0, 8936.0, 8912.0, 6565.0, 5514.0
Heard on: 11312.0, 10027.0, 6565.0
GS ID: Reykjavik, Iceland
Listening on: 17985.0, 15025.0, 11184.0, 8977.0, 6712.0, 5720.0
Heard on: 11184.0, 8977.0
GS ID: Al Muharraq, Bahrain
Listening on: 21982.0, 17967.0, 13354.0, 10075.0, 8885.0, 5544.0
Heard on:
GS ID: Agana, Guam
Listening on: 17919.0, 13312.0, 11306.0, 8927.0, 6652.0, 5451.0
Heard on:
GS ID: Riverhead, New York
Listening on: 21931.0, 17919.0, 13276.0, 11387.0, 8912.0, 6661.0, 5652.0
Heard on:

[2022-03-28 11:11:25 GMT] [17958.0 kHz] [8.9 Hz] [-47.6/-50.8 dBFS] [3.2 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 255
Dst GS: Muan, South Korea
Type: Logon resume
ICAO: 780C5B
AC info: B-2091, Boeing, 777 FFT, Air China Cargo Airlines
Frequency data:
Flight ID: CAO104
Lat: 59.1923889
Lon: 78.6317036
Time: 11:11:20
GS ID: Muan, South Korea
Listening on: 21931.0, 17958.0, 13342.0, 10060.0, 6619.0, 5502.0
Heard on: 17958.0
GS ID: Molokai, Hawaii
Listening on: 21937.0, 17919.0, 13324.0, 13312.0, 13276.0, 11348.0, 11312.0, 10027.0, 8936.0, 8912.0, 6565.0, 5514.0
Heard on: 11312.0
GS ID: Reykjavik, Iceland
Listening on: 17985.0, 15025.0, 11184.0, 8977.0, 6712.0, 5720.0
Heard on: 11184.0
GS ID: Agana, Guam
Listening on: 21928.0, 17919.0, 11306.0, 8927.0, 6652.0, 5451.0
Heard on: 17919.0, 8927.0
GS ID: Riverhead, New York
Listening on: 21931.0, 17919.0, 13276.0, 11387.0, 8912.0, 6661.0, 5652.0
Heard on: 17919.0
GS ID: Al Muharraq, Bahrain
Listening on: 21982.0, 17967.0, 13354.0, 10075.0, 8885.0, 5544.0
Heard on:

[2022-03-28 12:13:47.265 GMT] [21928.0 kHz] [7.9 Hz] [-48.4/-51.0 dBFS] [2.5 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 255
Dst GS: Agana, Guam
Type: Logon resume
ICAO: 71BE09
AC info: HL7609, Boeing, 747 8HTF, Korean Air
Frequency data:
Flight ID: KAL951
Lat: 41.4411954
Lon: 45.6894792
Time: 12:13:42
GS ID: Agana, Guam
Listening on: 21928.0, 17919.0, 13312.0, 11306.0, 8927.0, 6652.0
Heard on: 21928.0
GS ID: Molokai, Hawaii
Listening on: 21937.0, 17919.0, 13324.0, 13312.0, 13276.0, 11312.0, 10027.0, 8936.0, 6565.0, 5514.0
Heard on:
GS ID: Reykjavik, Iceland
Listening on: 15025.0, 11184.0, 8977.0, 6712.0, 5720.0, 3900.0
Heard on:
GS ID: Riverhead, New York
Listening on: 21931.0, 17919.0, 11387.0, 8912.0, 6661.0
Heard on:
GS ID: Al Muharraq, Bahrain
Listening on: 21982.0, 17967.0
Heard on:
GS ID: Hat Yai, Thailand
Listening on: 21949.0, 13270.0, 10066.0, 6535.0, 5655.0
Heard on:

[2022-03-28 07:38:13 GMT] [11312.0 kHz] [5.3 Hz] [-32.8/-36.6 dBFS] [3.9 dB] [600 bps] [S]
Downlink LPDU:
Src AC: 127
Dst GS: Molokai, Hawaii
Type: Unnumbered data
Performance data:
Version: 18
Flight ID: LAN532
Lat: 6.8523919
Lon: -79.6218483
Time: 07:38:10
Flight leg: 170
GS ID: Molokai, Hawaii
Frequency: 10027.0
Frequency search count:
This leg: 0
Prev leg: 0
HFDL disabled duration:
This leg: 0 sec
Prev leg: 792 sec
MPDUs received : 300 bps: 29 600 bps: 0 1200 bps: 0 1800 bps: 0
MPDUs received with errors : 300 bps: 0 600 bps: 0 1200 bps: 0 1800 bps: 0
MPDUs transmitted : 300 bps: 0 600 bps: 0 1200 bps: 0 1800 bps: 0
MPDUs delivered : 300 bps: 0 600 bps: 0 1200 bps: 0 1800 bps: 0
SPDUs received: 36
SPDUs missed: 1
Last frequency change cause: 7 (No change)

HFDL DX 27MAR22

[2022-03-26 22:54:53 GMT] [11306.0 kHz] [-2.7 Hz] [-35.7/-41.8 dBFS] [6.2 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 255
Dst GS: Agana, Guam
Type: Logon request (DLS)
ICAO: 780E4F
AC info: B-8326, AIRBUS, A320 214SL, Sichuan Airlines
Frequency data:
Flight ID: CSC652
Lat: 43.9090040
Lon: 87.4973440
Time: 22:54:48
GS ID: Agana, Guam
Listening on: 21928.0, 17919.0, 13312.0, 11306.0, 8927.0, 6652.0
Heard on: 21928.0, 17919.0, 11306.0, 8927.0
GS ID: Molokai, Hawaii
Listening on: 21937.0, 17919.0, 13324.0, 13312.0, 13276.0, 11312.0, 10027.0, 8936.0, 8912.0
Heard on: 21937.0, 13324.0, 11312.0, 10027.0
GS ID: Reykjavik, Iceland
Listening on: 11184.0, 8977.0, 3900.0
Heard on: 8977.0
GS ID: Riverhead, New York
Listening on: 21931.0, 17919.0, 13276.0, 11387.0, 6661.0, 5652.0
Heard on: 17919.0, 11387.0
GS ID: Al Muharraq, Bahrain
Listening on: 21982.0, 13354.0, 10075.0, 5544.0
Heard on:
GS ID: Hat Yai, Thailand
Listening on: 21949.0, 17928.0, 13270.0, 8825.0, 6535.0
Heard on: 21949.0, 13270.0, 6535.0

[2022-03-26 23:12:02 GMT] [11318.0 kHz] [-0.6 Hz] [-39.5/-42.3 dBFS] [2.8 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 255
Dst GS: Santa Cruz, Bolivia
Type: Logon resume
ICAO: E49221
AC info: PR-OCY, AIRBUS, A320 214SL, Avianca Brasil
Frequency data:
Flight ID: TAM355
Lat: -12.0750276
Lon: -60.7098784
Time: 23:11:56
GS ID: Santa Cruz, Bolivia
Listening on: 21997.0, 17916.0, 13315.0, 11318.0, 8957.0, 6628.0, 4660.0
Heard on: 11318.0
GS ID: Molokai, Hawaii
Listening on: 21937.0, 17919.0, 13324.0, 13312.0, 13276.0, 11348.0, 11312.0, 10027.0, 8936.0, 8912.0, 6565.0, 5514.0
Heard on:
GS ID: Reykjavik, Iceland
Listening on: 17985.0, 15025.0, 11184.0, 8977.0, 6712.0, 5720.0, 3900.0
Heard on: 11184.0, 8977.0
GS ID: Agana, Guam
Listening on: 21928.0, 17919.0, 13312.0, 11306.0, 8927.0, 6652.0, 5451.0
Heard on:
GS ID: Riverhead, New York
Listening on: 21931.0, 17919.0, 13276.0, 11387.0, 8912.0, 6661.0, 5652.0
Heard on: 13276.0, 11387.0
GS ID: Al Muharraq, Bahrain
Listening on: 21982.0, 17967.0, 13354.0, 10075.0, 8885.0, 5544.0
Heard on:

[2022-03-27 04:31:06 GMT] [11312.0 kHz] [4.4 Hz] [-36.8/-39.1 dBFS] [2.3 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 255
Dst GS: Molokai, Hawaii
Type: Logon resume
ICAO: A9CB1F
AC info: N730AV, AIRBUS, A319-132, Wells Fargo Trust Co Na Trustee
Frequency data:
Flight ID: AVA952
Lat: 9.3277537
Lon: -74.5379153
Time: 04:31:00
GS ID: Molokai, Hawaii
Listening on: 21937.0, 17919.0, 13324.0, 13312.0, 13276.0, 11348.0, 11312.0, 10027.0, 8936.0, 8912.0, 6565.0, 5514.0
Heard on: 13324.0, 11312.0
GS ID: Reykjavik, Iceland
Listening on: 17985.0, 15025.0, 11184.0, 8977.0, 6712.0, 5720.0, 3900.0
Heard on: 8977.0
GS ID: Riverhead, New York
Listening on: 21931.0, 17919.0, 13276.0, 11387.0, 8912.0, 6661.0, 5652.0
Heard on: 8912.0, 6661.0
GS ID: Al Muharraq, Bahrain
Listening on: 21982.0, 17967.0, 13354.0, 10075.0, 8885.0, 5544.0
Heard on:
GS ID: Agana, Guam
Listening on: 21928.0, 17919.0, 13312.0, 11306.0, 8927.0, 6652.0, 5451.0
Heard on:
GS ID: Shannon, Ireland
Listening on: 11384.0, 10081.0, 8942.0, 8843.0, 5547.0, 3455.0, 2998.0
Heard on: 10081.0

[2022-03-27 05:53:14 GMT] [11318.0 kHz] [5.8 Hz] [-34.2/-38.0 dBFS] [3.8 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 255
Dst GS: Santa Cruz, Bolivia
Type: Logon resume
ICAO: E8026C
AC info: CC-BBE, BOEING, 787 8, Latam Airlines
Frequency data:
Flight ID: LAN706
Lat: -17.7182345
Lon: -49.6867937
Time: 05:53:10
GS ID: Santa Cruz, Bolivia
Listening on: 21997.0, 17916.0, 13315.0, 11318.0, 8957.0, 6628.0, 4660.0
Heard on: 13315.0, 11318.0
GS ID: Molokai, Hawaii
Listening on: 21937.0, 17919.0, 13324.0, 13312.0, 13276.0, 11348.0, 11312.0, 10027.0, 8936.0, 8912.0, 6565.0, 5514.0
Heard on:
GS ID: Reykjavik, Iceland
Listening on: 17985.0, 15025.0, 11184.0, 8977.0, 6712.0, 5720.0, 3900.0
Heard on:
GS ID: Agana, Guam
Listening on: 21928.0, 17919.0, 13312.0, 11306.0, 8927.0, 6652.0, 5451.0
Heard on: 21928.0, 17919.0
GS ID: Riverhead, New York
Listening on: 21931.0, 17919.0, 13276.0, 11387.0, 8912.0, 6661.0, 5652.0
Heard on: 17919.0
GS ID: Al Muharraq, Bahrain
Listening on: 21982.0, 17967.0, 13354.0, 10075.0, 8885.0, 5544.0
Heard on:

[2022-03-27 05:55:46 GMT] [11318.0 kHz] [5.0 Hz] [-33.0/-38.5 dBFS] [5.5 dB] [300 bps] [S]
Downlink LPDU:
Src AC: 255
Dst GS: Santa Cruz, Bolivia
Type: Logon resume
ICAO: 89647C
AC info: A6-EUR, AIRBUS, A380 842, Emirates Airline
Frequency data:
Flight ID: UAE262
Lat: -19.4321049
Lon: -38.7148642
Time: 05:55:42
GS ID: Santa Cruz, Bolivia
Listening on: 21997.0, 17916.0, 13315.0, 11318.0, 8957.0, 6628.0, 4660.0
Heard on: 13315.0, 11318.0
GS ID: Reykjavik, Iceland
Listening on: 17985.0, 15025.0, 11184.0, 8977.0, 6712.0, 5720.0, 3900.0
Heard on: 3900.0
GS ID: Molokai, Hawaii
Listening on: 21937.0, 17919.0, 13324.0, 13312.0, 11348.0, 11312.0, 10027.0, 8936.0, 8912.0, 6565.0, 5514.0
Heard on: 11312.0
GS ID: Riverhead, New York
Listening on: 21931.0, 17919.0, 8912.0, 6661.0, 5652.0
Heard on: 17919.0, 8912.0
GS ID: Agana, Guam
Listening on: 21928.0, 17919.0, 13312.0, 11306.0, 8927.0, 6652.0, 5451.0
Heard on: 21928.0, 17919.0
GS ID: Hat Yai, Thailand
Listening on: 21949.0, 13270.0, 6535.0, 5655.0
Heard on: