Hot Frequencies and
Digital Data Transmission Screenshots

The following - very recent! - screenshots have been produced and uploaded to this international pooling webpage by our worldwide net of cooperators, using advanced equipment such as the superb PROCITEC and WAVECOM Digital Data Decoders. All frequencies are in kHz, and all system times are UTC. Schedules and traffic details can be found in our 2019/2020 Guide to Utility Radio Stations. Standard aeronautical and telecommunication abbreviations can be found everywhere; certain special terms are explained.


10081.0 kHz ACARS/HFDL H07 Shannon Air, Ireland, + aircraft N125FE + P4-KGA + VT-IEK + VT-IFM
DMU = Data Management Unit
FDIMU = Flight Data Interface Management Unit
PCMCIA = Personal Computer Memory Card International Association
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

5514.0 kHz ACARS/HFDL H02 Hoolehua Air, Molokai, Hawaii, + aircraft B-LJF + N607UP + N620FE + RPC3507
LLWS = Low-Level Wind Shear
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

5514.0 kHz ACARS/HFDL H02 Hoolehua Air, Molokai, Hawaii, + aircraft B-7878
The Basic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or data for navigational accuracy

10093.0 kHz ACARS/HFDL H09 Barrow Air, Alaska, + aircraft VP-BLH + VP-BKQ + VQ-BMX

2790.8 kHz FUE French Navy Brest, France
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

5720.0 kHz ACARS/HFDL H03 Reykjavik Air, Iceland, + aircraft JY-AYP + VP-BMM

5195.0 kHz DRA5 Kiel, Germany
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

6652.0 kHz ACARS/HFDL H16 Barrigada Air, Guam, + aircraft B-302G + HL7617 + N608UP
The Waypoint Change Event is triggered by a change
made to the Next, or the Next-plus-one waypoint
This change normally occurs due to normal waypoint sequencing by the FMS

The Basic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or data for navigational accuracy

6652.0 kHz ACARS/HFDL H16 Barrigada Air, Guam, + aircraft B-KQN + B-5928 + CC-BDC + N134FE + N454PA + VN-A597
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

8425.5 kHz XSG Shanghai Radio, China

6652.0 kHz ACARS/HFDL H16 Barrigada Air, Guam, + aircraft B-LRQ + B-302G + 9V-SMO + 9V-SMS
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

6535.0 kHz ACARS/HFDL H06 Hat Yai Air, Thailand, + aircraft 9V-SHF + 9V-SKI
The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles each

The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

6535.0 kHz ACARS/HFDL H06 Hat Yai Air, Thailand, + aircraft A6-EIU + JA823A + VT-IAX
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

10555.0 kHz VMW Wiluna Meteo WA, Australia
The continuous phase jumps are caused by the station itself,
confirmed by many radio monitoring sites around the world!

10555.0 kHz VMW Wiluna Meteo WA, Australia
The continuous phase jumps are caused by the station itself,
confirmed by many radio monitoring sites around the world!

10555.0 kHz VMW Wiluna Meteo WA, Australia
The continuous phase jumps are caused by the station itself,
confirmed by many radio monitoring sites around the world!

8927.0 kHz ACARS/HFDL H16 Barrigada Air, Guam, + aircraft PK-GMM + UPA2101 + 9V-SHC + 9V-SHH
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

8927.0 kHz ACARS/HFDL H16 Barrigada Air, Guam, + aircraft 9V-SMT
Apart from decoding ADS-C and CPDLC messages such as
Periodic Reports, go2MONITOR displays meta-data such as
sender and recipient identifications, extracted from decoder result files
The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles each

8939.0 kHz ACARS/HFDL H10 Muan Air, South Korea, + aircraft JA824P + P4-KGA + 5Y-CYC
This is exactly the new station -
within the largest worldwide radio network on HF! -
that we've already predicted on page 20 of our
2019/2020 GUIDE TO UTILITY RADIO STATIONS!

5502.0 kHz ACARS/HFDL H10 Muan Air, South Korea, + aircraft HL7746 + VQ-BRJ + 9V-SKS
This is exactly the new station -
within the largest worldwide radio network on HF! -
that we've already predicted on page 20 of our
2019/2020 GUIDE TO UTILITY RADIO STATIONS!
ECS = Environmental Control System
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

3585.0 kHz HLL8 Soul Meteo, South Korea

518.0 kHz NMO United States Coast Guard Honolulu, Hawaii

518.0 kHz NOJ United States Coast Guard Kodiak, Alaska

6559.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + aircraft B-KPV + B-5902 + N616FE + N896FD + ZS-SXM + 9V-SGD
For years, we've monitored only SAA -
and no buddy else in tenthousands of messages! -
regularly transmitting AMDARs
(decoding see Radio Data Code Manual page 271)
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

11312.0 kHz ACARS/HFDL H02 Hoolehua Air, Molokai, Hawaii, + aircraft N869FD
Interior/exterior temperature log
SAT = Static Air Temperature
Incrrrreddddiblllle: them there chaps write 14 02 20 ... Selamat pagi!

5502.0 kHz ACARS/HFDL H10 Muan Air, South Korea, + flight CAO105
If the latest HFDL System Table file is copied into SIGMIRA's "bin" directory,
the GUI displays MUAN - SOUTH KOREA
and the corresponding frequency
This is exactly the new station -
within the largest worldwide radio network on HF! -
that we've already predicted on page 20 of our
2019/2020 GUIDE TO UTILITY RADIO STATIONS!

8416.5 kHz SUZ Serapeum Radio, Egypt

8416.5 kHz SUZ Serapeum Radio, Egypt

8416.5 kHz LGS Svalbard Radio, Spitsbergen, Norway

10081.0 kHz ACARS/HFDL H07 Shannon Air, Ireland, + aircraft N878FD + VP-BNC + VT-JBN

10027.0 kHz ACARS/HFDL H02 Hoolehua Air, Molokai, Hawaii, + aircraft A6-EIH + A6-ETR + HL7746
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

5508.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + aircraft N605FE
EVS = Enhanced Vision System
HUD = Heads Up Display

6535.0 kHz ACARS/HFDL H06 Hat Yai Air, Thailand, + flight QTR8KL

4851.7 kHz Digital data station

5502.0 kHz ACARS/HFDL H10 Muan Air, South Korea, + aircraft 9V-SCK
This is exactly the new station -
within the largest worldwide radio network on HF! -
that we've already predicted on page 20 of our
2019/2020 GUIDE TO UTILITY RADIO STATIONS!
Apart from decoding ADS-C and CPDLC messages such as
Periodic Reports, go2MONITOR displays meta-data such as
sender and recipient identifications, extracted from decoder result files
The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles each

10084.0 kHz ACARS/HFDL H05 Auckland Air, New Zealand, + aircraft N27908 + PR-TYN

10084.0 kHz ACARS/HFDL H05 Auckland Air, New Zealand, + aircraft HL7747 + JA824A + VH-EXZ
The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles each

The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

16135.0 kHz KVM70 Honolulu Meteo, Hawaii
ITCZ = Inter-Tropical Convergence Zone

10027.0 kHz ACARS/HFDL H02 Hoolehua Air, Molokai, Hawaii, + aircraft JA828A + N585AS + N618UP + VQ-BBD
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

10027.0 kHz ACARS/HFDL H02 Hoolehua Air, Molokai, Hawaii, + aircraft N586AS
Apart from decoding ADS-C and CPDLC messages such as
Periodic Reports, go2MONITOR displays meta-data such as
sender and recipient identifications, extracted from decoder result files

8416.5 kHz NMF United States Coast Guard Boston MA, United States of America
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

10063.0 kHz ACARS/HFDL H11 Panama City Air, Panama, + flight NW1133

6450.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

6450.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

6450.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

8416.5 kHz NMC United States Coast Guard San Francisco CA, United States of America
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

12579.0 kHz NMF United States Coast Guard Boston MA, United States of America

6559.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + aircraft A6-EEU + HL7642
The Basic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or data for navigational accuracy

4209.5 kHz XVG Hai Phong Radio, Viet Nam

16906.8 kHz FUV French Navy Jibuti, Djibouti
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

10093.0 kHz ACARS/HFDL H09 Barrow Air, Alaska, + aircraft UK32018 + VQ-BMX + VQ-BWB
AI = Arrival Information
BMC = Bleed Monitoring Computer
GC = Ground Connections
DI = Departure Information

10093.0 kHz ACARS/HFDL H09 Barrow Air, Alaska, + flight KZR854

518.0 kHz HSA Bangkok Radio, Thailand

518.0 kHz XVS Ho Chi Minh City Radio, Viet Nam

518.0 kHz 9WW21 Miri Radio, Sarawak, Malaysia

518.0 kHz Sandakan Radio, Sabah, Malaysia

518.0 kHz Byunsan Radio, South Korea

518.0 kHz VRX Hong Kong Radio, China

518.0 kHz JNX Kushiro Radio, Japan

486.0 kHz XSG Shanghai Radio, China
Chinese teleprinter code after Latin alphabet header

8977.0 kHz ACARS/HFDL H03 Reykjavik Air, Iceland, + aircraft JY-AYU + 9V-SMQ

8977.0 kHz ACARS/HFDL H03 Reykjavik Air, Iceland, + aircraft OY-KAM + P4-KDC

16963.3 kHz FUF French Navy Fort de France, Martinique
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

4318.0 kHz NMG United States Coast Guard New Orleans LA, United States of America

8834.0 kHz ACARS/HFDL H08 Johannesburg Air, South Africa (Republic of), + aircraft G-XLEE + JY-AYV + PR-TYL + VT-IAS

7535.0 kHz VMW Wiluna Meteo WA, Australia
The continuous phase jumps are caused by the station itself,
confirmed by many radio monitoring sites around the world
These fellers just don't get it!

7535.0 kHz VMW Wiluna Meteo WA, Australia
The continuous phase jumps are caused by the station itself,
confirmed by many radio monitoring sites around the world
These fellers just don't get it!

5583.0 kHz ACARS/HFDL H05 Auckland Air, New Zealand, + aircraft B-8332 + B-18916 + JA814P
CDSS = Cockpit Door Surveillance System
CDSU = Cockpit Door Surveillance Unit
HIRO = High Intensity Runway Operation

5583.0 kHz ACARS/HFDL H05 Auckland Air, New Zealand, + aircraft HL8293 + ZS-SXB
For years, we've monitored only SAA -
and no buddy else in tenthousands of messages! -
regularly transmitting AMDARs
(decoding see Radio Data Code Manual page 271)

5583.0 kHz ACARS/HFDL H05 Auckland Air, New Zealand, + aircraft HL8258 + HL8259 + VN-A862
The Altitude Range Change Event is triggered
when the aircraft's altitude exceeds the altitude ceiling
or floor defined in the contract by the ground system

The Vertical Rate Change Event is triggered
when the aircraft's vertical rate is either less or greater
than a parameter defined in the contract

The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

7795.0 kHz JMH2 Tokyo Meteo, Japan

7795.0 kHz JMH2 Tokyo Meteo, Japan

518.0 kHz RFA Astrakhan Radio, Russian Federation

518.0 kHz EJK Irish Coast Guard Valentia, Ireland

518.0 kHz ICH Italian Coast Guard La Maddalena Island, Italy

518.0 kHz GPK Portpatrick Radio, United Kingdom

4209.5 kHz XSQ Guangzhou Radio, China

5508.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + aircraft N540LA
IDG = Integrated Drive Generator
ISFC = Indicated Specific Fuel Consumption
OIP = Oil Pressure
OIT = Oil Temperature
TLA = Thrust Lever Angle

5508.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + aircraft C-FIUJ + C-FRSR + N540LA
EEC = Electronic Engine Controller
HPC = High-Pressure Compressor
HPSOV = High Pressure Shut-Off Valve
PCMCIA = Personal Computer Memory Card International Association
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

13276.0 kHz ACARS/HFDL H04 Riverhead Air NY, United States of America, + aircraft N583NW + RPC3506
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

13276.0 kHz ACARS/HFDL H04 Riverhead Air NY, United States of America, + aircraft F-WMIL
AIRBUS A350-1000 test flights in Arctic Canada
Parameters ...

8458.0 kHz Digital data station

10194.0 kHz AK0FEM Federal Emergency Management Agency Juneau Alaska +
FC1FEM Federal Emergency Management Agency Maynard MA + FC5FEM Federal Emergency Management Agency Madison WI + FC6FEM Federal Emergency Management Agency Denton TX + FC0FEM Federal Emergency Management Agency Bothell WA + FC9FEM Federal Emergency Management Agency Oakland CA, United States of America

6559.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + aircraft B-KPS + B-KQG + HL7579 + N856FD + N860FD
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

6559.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + aircraft B-KQG
Correct runway request is MDY 06, not MDY 6!
PMDY is an ETOPS Emergency Diversion Point ...
BTMS = Brake Temperature Monitoring System

8424.0 kHz SVO Olympia Radio, Athens, Greece

21928.0 kHz ACARS/HFDL H16 Barrigada Air, Guam, + flight TAX708

21928.0 kHz ACARS/HFDL H16 Barrigada Air, Guam
21931.0 kHz ACARS/HFDL H10 Muan Air, South Korea
Not bad for the sunspot minimum ...

8977.0 kHz ACARS/HFDL H03 Reykjavik Air, Iceland, + aircraft JY-AYQ + VT-IAS

16806.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

8295.7 kHz KVM70 Honolulu Meteo, Hawaii
Frequency not scheduled ...

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina
Missing blank character ...

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina
Missing blank character ...

4610.0 kHz GYA Royal Navy London, United Kingdom

16806.5 kHz NMC United States Coast Guard San Francisco CA, United States of America

8927.0 kHz ACARS/HFDL H16 Barrigada Air, Guam, + aircraft HL7211 + N605UP + 9V-SMC + 9V-SMM
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

518.0 kHz DZX Manila Radio, Philippines

8295.7 kHz KVM70 Honolulu Meteo, Hawaii
Frequency not scheduled ...
Chart incomplete, cut short by the station

6559.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + aircraft N512DN + N593NW + 9V-SCB
HW = Head Wind
XW = Cross Wind
WPR = Waypoint Position Reporting

15586.0 kHz RCV Commonwealth of Independent States Navy Sevastopol', Ukraine

16067.7 kHz Ministry of Foreign Affairs Cairo, Egypt

8834.0 kHz ACARS/HFDL H08 Johannesburg Air, South Africa (Republic of), + aircraft SU-GEA + SU-GEG + SU-GEL + VP-BCD + VP-BFE

5179.0 kHz RMP Commonwealth of Independent States Navy Kaliningrad, Russian Federation

8416.5 kHz NMF United States Coast Guard Boston MA, United States of America

5508.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + aircraft B-1167 + N585NW + N851FD
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

518.0 kHz NMW United States Coast Guard Astoria OR, United States of America

518.0 kHz NMQ United States Coast Guard Long Beach CA, United States of America

518.0 kHz JGC Yokohama Radio, Japan

4209.5 kHz XVN Nha Thrang Radio, Viet Nam

12702.7 kHz CTA North Atlantic Treaty Organization Lisbon, Portugal

4209.5 kHz XSV Tianjin Radio, China

3585.0 kHz HLL8 Soul Meteo, South Korea

3585.0 kHz HLL8 Soul Meteo, South Korea

8939.0 kHz ACARS/HFDL H10 Muan Air, South Korea, + flight CES229
This is exactly the new station -
within the largest worldwide radio network on HF! -
that we've already predicted on page 20 of our
2019/2020 GUIDE TO UTILITY RADIO STATIONS!

518.0 kHz L2T Argentinian Coast Guard Mar del Plata, Argentina

8416.5 kHz NMC United States Coast Guard San Francisco CA, United States of America

8295.7 kHz KVM70 Honolulu Meteo, Hawaii
Frequency not scheduled ...

8295.7 kHz KVM70 Honolulu Meteo, Hawaii
Frequency not scheduled ...

5156.8 kHz TBB Turkish Navy Ankara, Turkey

8834.0 kHz ACARS/HFDL H08 Johannesburg Air, South Africa (Republic of), + aircraft V5-ANO
Apart from decoding ADS-C and CPDLC messages such as
Periodic Reports, go2MONITOR displays meta-data such as
sender and recipient identifications, extracted from decoder result files
The Waypoint Change Event is triggered by a change
made to the Next, or the Next-plus-one waypoint
This change normally occurs due to normal waypoint sequencing by the FMS

5100.0 kHz VMC Charleville Meteo QLD, Australia
The continuous phase jumps are caused by the station itself,
confirmed by many radio monitoring sites around the world!

6529.0 kHz ACARS/HFDL H17 Telde Air, Canary Islands, + aircraft 9V-SKJ
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
The Waypoint Change Event is triggered by a change
made to the Next, or the Next-plus-one waypoint
This change normally occurs due to normal waypoint sequencing by the FMS
The Next or Next-plus-one waypoint can be either an ATS waypoint or a pilot inserted waypoint

The Basic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or data for navigational accuracy

8459.0 kHz NOJ United States Coast Guard Kodiak, Alaska

8459.0 kHz NOJ United States Coast Guard Kodiak, Alaska

8459.0 kHz NOJ United States Coast Guard Kodiak, Alaska

8957.0 kHz ACARS/HFDL H13 Santa Cruz Air, Bolivia, + aircraft JA882A + PR-YYC
Perfect OOOI ...

8957.0 kHz ACARS/HFDL H13 Santa Cruz Air, Bolivia, + aircraft PR-YYH
Apart from decoding ADS-C and CPDLC messages such as
Periodic Reports, go2MONITOR displays meta-data such as
sender and recipient identifications, extracted from decoder result files

518.0 kHz JNB Naha Radio, Okinawa Island, Japan

518.0 kHz UFL Vladivostok Radio SE, Russian Federation

518.0 kHz Hua-Lien Radio, Taiwan (Democratic Republic of China)

6463.8 kHz FUM French Navy Papeete, Tahiti, Polynesia (French)
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

518.0 kHz EQI Abbas Radio, Iran

518.0 kHz A9M Hamala Radio, Bahrain
MENAS = Middle East Navigation Aids Service
MEGULITE = Middle East Gulf Lighting Service

518.0 kHz A9M Hamala Radio, Bahrain
MENAS = Middle East Navigation Aids Service
MEGULITE = Middle East Gulf Lighting Service

2998.0 kHz ACARS/HFDL H07 Shannon Air, Ireland, + flight DP0182

4232.5 kHz Digital data station, Japan

4209.5 kHz TAH Istanbul Radio, Turkey

4209.5 kHz XVN Nha Thrang Radio, Viet Nam

4209.5 kHz TAH Istanbul Radio, Turkey

8295.7 kHz KVM70 Honolulu Meteo, Hawaii
Frequency not scheduled ...

8295.7 kHz KVM70 Honolulu Meteo, Hawaii
Frequency not scheduled ...

4209.5 kHz XVG Hai Phong Radio, Viet Nam

8459.0 kHz NOJ United States Coast Guard Kodiak, Alaska

518.0 kHz VAE Canadian Coast Guard Tofino BC, Canada

518.0 kHz NMC United States Coast Guard San Francisco CA, United States of America

8416.5 kHz UAT Moscow Radio, Russian Federation

8416.5 kHz UAT Moscow Radio, Russian Federation
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

3585.0 kHz HLL8 Soul Meteo, South Korea

3585.0 kHz HLL8 Soul Meteo, South Korea

13351.0 kHz ACARS/HFDL H05 Auckland Air, New Zealand, + aircraft B-LJE + B-1466
EAI = Engine Anti Ice
FAMV = Fan Air Modulating Valve
MEL = Minimum Equipment List

13351.0 kHz ACARS/HFDL H05 Auckland Air, New Zealand, and flight A6-EIU + B-LJE
BTMS = Brake Temperature Monitoring System

4272.8 kHz FUJ French Navy Noumea, New Caledonia

4681.0 kHz ACARS/HFDL H08 Johannesburg Air, South Africa (Republic of), + aircraft F-HPJD + VT-IEM
FAF = Final Approach Fix

518.0 kHz EJM Irish Coast Guard Malin Head, Ireland

8134.7 kHz 99901 Ministry of Foreign Affairs Cairo, Egypt, to 44406 Egyptian Embassy Delhi, India
Apart from decoding ADS-C and CPDLC messages such as
Periodic Reports, go2MONITOR displays meta-data such as
sender and recipient identifications, extracted from decoder result files

518.0 kHz NOJ United States Coast Guard Kodiak, Alaska

3900.0 kHz ACARS/HFDL H03 Reykjavik Air, Iceland, + flight DP0418

518.0 kHz Vakalpudi Radio, India

7550.0 kHz All India Radio's DRM transmission
decoded with the new Kiwi-SDR extension feature

17151.2 kHz NMC United States Coast Guard San Francisco CA, United States of America

17151.2 kHz NMC United States Coast Guard San Francisco CA, United States of America

17151.2 kHz NMC United States Coast Guard San Francisco CA, United States of America

518.0 kHz 9HD Valetta Radio, Malta

518.0 kHz SVK Kerkyra Radio, Greece

490.0 kHz UUI Odessa Radio, Ukraine

3622.5 kHz JMH Tokyo Meteo, Japan

6661.0 kHz ACARS/HFDL H04 Riverhead Air NY, United States of America, + aircraft C-GHPN + N613UP + VQ-BBE
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

6661.0 kHz ACARS/HFDL H04 Riverhead Air NY, United States of America, + aircraft C-FRSO + ZS-SNI
For years, we've monitored only SAA -
and no buddy else in tenthousands of messages! -
regularly transmitting AMDARs
(decoding see Radio Data Code Manual page 271)
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response CPDLC
FMH = Facilities Message Header = Flight Number
The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles each

The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

518.0 kHz XSZ Dalian Radio, China

6619.0 kHz ACARS/HFDL H10 Muan Air, South Korea, + aircraft B-1297
This is exactly the new station -
within the largest worldwide radio network on HF! -
that we've already predicted on page 20 of our
2019/2020 GUIDE TO UTILITY RADIO STATIONS!

8416.5 kHz UFZ Vladivostok Radio SE, Russian Federation

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

6619.0 kHz ACARS/HFDL H10 Muan Air, South Korea, + aircraft B-1640 + B-2046 + B-18905 + 4K-AZ82
This is exactly the new station -
within the largest worldwide radio network on HF! -
that we've already predicted on page 20 of our
2019/2020 GUIDE TO UTILITY RADIO STATIONS!

9459.0 kHz ZKLF Auckland Meteo, New Zealand

518.0 kHz UON Baku Radio, Azerbaijan

518.0 kHz 4XO Haifa Radio, Israel

518.0 kHz TAH Istanbul Radio, Turkey

6661.0 kHz ACARS/HFDL H04 Riverhead Air NY, United States of America, + aircraft N609FE

6661.0 kHz ACARS/HFDL H04 Riverhead Air NY, United States of America, + aircraft N576UP + ZS-SXI + 9V-SGB
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

The Waypoint Change Event is triggered by a change
made to the Next, or the Next-plus-one waypoint
This change normally occurs due to normal waypoint sequencing by the FMS
The Next or Next-plus-one waypoint can be either an ATS waypoint or a pilot inserted waypoint
The Basic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or data for navigational accuracy

13324.0 kHz ACARS/HFDL H02 Hoolehua Air, Molokai, Hawaii, + flight AS0739

8948.0 kHz ACARS/HFDL H17 Telde Air, Canary Islands, + aircraft CN-ROD + G-TTNJ + P4-KDD + 9V-SMW
What seems to be Pidgin for Motor Talk (remember wantok = one talk ...)
is in fact a manufacturer of superb aircraft tugs / positioning units ;-)
So the latest Mototok now can even move an AIRBUS A380-841??
Not bad at all!
CTOT = Calculated Take-Off Time (used for slot allocation)
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FAR ADS = Facilities Application Response ADS-C
FAR ATC = Facilities Application Response CPDLC
FMH = Facilities Message Header = Flight Number

8454.0 kHz UIW Kaliningrad Radio, Russian Federation

8834.0 kHz ACARS/HFDL H08 Johannesburg Air, South Africa (Republic of), + flight UAE32

4209.5 kHz SVH Iraklion Radio, Greece

9046.7 kHz Ministry of Foreign Affairs Cairo, Egypt, to Egyptian Embassy Washington DC, United States of America
A pretty long one ...

9046.7 kHz Ministry of Foreign Affairs Cairo, Egypt, to Egyptian Embassy Washington DC, United States of America

8416.5 kHz NMO United States Coast Guard Honolulu, Hawaii

8416.5 kHz NMO United States Coast Guard Honolulu, Hawaii

518.0 kHz 9MG Georgetown Radio, Pinang Island, Malaysia

518.0 kHz United States Coast Guard Savannah GA, United States of America

518.0 kHz LZW Varna Radio, Bulgaria

518.0 kHz Izmir Radio, Turkey

518.0 kHz Hamburg Meteo, Germany

518.0 kHz LFO Oerlandet Radio, Norway

16916.8 kHz FUX French Forces Le Port de la Riviere des Galets, Reunion
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

10100.8 kHz DDK9 Hamburg Meteo, Germany
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

10100.8 kHz DDK9 Hamburg Meteo, Germany

10100.8 kHz DDK9 Hamburg Meteo, Germany

8454.0 kHz UIW Kaliningrad Radio, Russian Federation

490.0 kHz 9AS Split Radio, Croatia

490.0 kHz IQM Mondolfo Radio, Italy

490.0 kHz GNI Niton Radio, United Kingdom

13351.0 kHz ACARS/HFDL H05 Auckland Air, New Zealand, and flight CI0028

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

12668.3 kHz FUG French Navy Saissac, France

8319.0 kHz 4XZ Israeli Navy Haifa, Israel

17958.0 kHz ACARS/HFDL H10 Muan Air, South Korea, + aircraft B-1297 + B-8973 + OH-LWH
This is exactly the new station -
within the largest worldwide radio network on HF! -
that we've already predicted on page 20 of our
2019/2020 GUIDE TO UTILITY RADIO STATIONS!

13276.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + flight CCA983

6422.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

518.0 kHz Parangipettai Radio, India

518.0 kHz VAU Canadian Coast Guard Chebogue NS, Canada

3965.0 kHz Radio France International's DRM transmission
decoded with the new Kiwi-SDR extension feature
Among several nearby digital data signals, the sonagram shows
the CW exercise of the French Army at Mont-Valerien on 3881 kHz,
the HFDL aggregate of Reykjavik Air, Iceland, on 3900 kHz,
and a 50 Baud FSK emission on 4020 kHz

8422.0 kHz OSY Sailmail Radio, Brugge, Belgium
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

8503.8 kHz NMG United States Coast Guard New Orleans LA, United States of America

8503.8 kHz NMG United States Coast Guard New Orleans LA, United States of America

11318.0 kHz ACARS/HFDL H13 Santa Cruz Air, Bolivia, + flight SIA921

7880.0 kHz DDK3 Hamburg Meteo, Germany

7778.7 kHz 44406 Egyptian Embassy Delhi, India, to 99904 Ministry of Foreign Affairs Cairo, Egypt

6340.5 kHz NMF United States Coast Guard Boston MA, United States of America

6340.5 kHz NMF United States Coast Guard Boston MA, United States of America

518.0 kHz EQM Bushire Radio, Iran

3855.0 kHz DDH3 Hamburg Meteo, Germany

6220.0 kHz IDN Italian Navy Napoli, Italy

12695.5 kHz KFS San Francisco Radio CA, United States of America

518.0 kHz XSX Chi-Lung Radio, Taiwan (Democratic Republic of China)

518.0 kHz TFX Siglufjördur Radio, Iceland

518.0 kHz UGE Arkhangelsk Radio, Russian Federation

7630.8 kHz Digital data station

4219.0 kHz XSQ Guangzhou Radio, China
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI
Characters in brackets denote the Latin alphabet
The four-figure groups without brackets
are Chinese ideographs - see page 48 ff. in our Radio Data Code Manual

4215.0 kHz XSG Shanghai Radio, China
Characters in brackets denote the Latin alphabet
The four-figure groups without brackets
are Chinese ideographs - see page 48 ff. in our Radio Data Code Manual

490.0 kHz XVT Da Nang Radio, Viet Nam

8957.0 kHz ACARS/HFDL H13 Santa Cruz Air, Bolivia, + aircraft JA04VA + N968AV + RPC8782 + VQ-BRH
A NOTAM decoder can be found e.g. here
AFN = ATS Facilities Notification (ATS = Air Traffic Service)
FAK = Facilities Acknowledgement Message
FCO ADS = Facilities Contact ADS-C
FCO ATC = Facilities Contact CPDLC
FMH = Facilities Message Header = Flight Number
FPO = Facilities Current Position
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here
The Periodic Contract is a report sent every ... minutes
It specifies the reporting rate at which the avionics is required
to assemble and downlink the requested information to the ground system
The minimum reporting rate is usually not greater than every 14 minutes
but can vary to suit the need of the ground station
This procedure allows longitudinal and lateral separation of aircraft
in oceanic areas to be reduced to 30 nautical miles each

518.0 kHz L2G Argentinian Coast Guard Buenos Aires, Argentina

6450.0 (!) kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

12858.8 kHz 6WW French Navy Dakar, Senegal
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

8948.0 kHz ACARS/HFDL H17 Telde Air, Canary Islands, + aircraft JY-AYR
ADIRU = Air Data Inertial Reference Unit
GPSSU = Global Positioning System Sensor Unit

518.0 kHz Balasore Radio, India

518.0 kHz Parangipettai Radio, India

3622.5 kHz JMH Tokyo Meteo, Japan

8446.5 kHz BBSR BPR KNJ KPT Digital data stations, India

518.0 kHz VFF Canadian Coast Guard Iqaluit NUN, Canada

12840.5 kHz PBB Dutch Navy Den Helder, Netherlands

12750.0 kHz NMF United States Coast Guard Boston MA, United States of America

8658.0 kHz JFW Fukushima Fisheries Radio, Japan

10063.0 kHz ACARS/HFDL H11 Panama City Air, Panama, + aircraft CS-TSG
The Basic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or data for navigational accuracy
The Lateral Deviation Change Event is triggered
when the aircraft’s actual position exceeds a lateral distance parameter
from the aircraft’s expected position on the active flight plan

7795.0 kHz JMH2 Tokyo Meteo, Japan
Severe Tropical Storm Kammuri

518.0 kHz VBC Canadian Coast Guard Wiarton ONT, Canada

518.0 kHz VAJ Canadian Coast Guard Prince Rupert BC, Canada

518.0 kHz NMN United States Coast Guard Norfolk VA, United States of America

518.0 kHz UFO Kholmsk Radio, FE, Russian Federation

518.0 kHz JNL Otaru Radio, Japan

518.0 kHz XSG Shanghai Radio, China

518.0 kHz LGQ Rogaland Radio, Norway

7880.0 kHz DDK3 Hamburg Meteo, Germany

518.0 kHz Porto Santo Radio, Madeira
POST = Porto Santo

518.0 kHz EAL Las Palmas Radio, Canary Islands

518.0 kHz EAR La Coruna Radio, Spain

518.0 kHz DZX Manila Radio, Philippines

8416.5 kHz VFF Canadian Coast Guard Iqaluit NUN, Canada

518.0 kHz PBK Netherlands Coast Guard Ijmuiden, Netherlands

3585.0 kHz HLL8 Soul Meteo, South Korea

11135.0 kHz GANOB10 HQ1 Digital data stations

2815.0 kHz MKL Royal Air Force London, United Kingdom
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

2610.2 kHz FUO French Navy Toulon, France

518.0 kHz EAV Valencia Radio, Spain

518.0 kHz SVL Limnos Radio, Greece

490.0 kHz Centre Regional Operationnel de Surveillance et de Sauvetage Toulon, France

8582.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

4154.0 kHz Digital data station, Japan

518.0 kHz JNR Moji Radio, Japan

13315.0 kHz ACARS/HFDL H13 Santa Cruz Air, Bolivia, + aircraft B-2787 + B-6097 + F-HPJH + PR-YYF + 9V-SMC
The MA-AFAS CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

518.0 kHz 5BA Nicosia Radio, Cyprus

3247.4 kHz ZKLF Auckland Meteo, New Zealand

8462.0 kHz 9MR Malaysian Navy Johor Baharu, Malaysia
Shift is indeed 898 and not standard 850 Hz

518.0 kHz UFO Kholmsk Radio, FE, Russian Federation

4227.5 kHz Italian Navy Rome, Italy

518.0 kHz VWB Mumbai Radio, India

4209.5 kHz XVG Hai Phong Radio, Viet Nam

518.0 kHz NMG United States Coast Guard New Orleans LA, United States of America

518.0 kHz NMG United States Coast Guard New Orleans LA, United States of America

4170.0 kHz XSG Shanghai Radio, China

518.0 kHz LGP Bodoe Radio, Norway

13276.0 kHz ACARS/HFDL H04 Riverhead Air NY, United States of America, + flight DAL159

518.0 kHz L2N Argentinian Coast Guard Bahia Blanca, Argentina

518.0 kHz L3b Argentinian Coast Guard Comodoro Rivadavia, Argentina

518.0 kHz UDN Novorossiysk Radio, Russian Federation

518.0 kHz Veraval Radio, India

17146.4 kHz CBV Valparaiso Radio, Chile

17146.4 kHz CBV Valparaiso Radio, Chile

6365.0 kHz 7CB Indonesian Navy Belawan, Indonesia

4233.0 kHz Fully automatic frequency step mode monitoring
with continuous classification of digital data signals
on a remote receiver abroad

State-of-the-art digital data signals have been tested since 2013
by innovative broadcast stations such as the Voice of America ...
Here's a 6067.1 kHz MFSK-16 emission on the lower sideband
of AM station Channel 292 transmitting both sidebands
± 2900 Hz from the carrier frequency 6070.0 kHz
New 2020 edition of our Perseus Frequency Database
now shows utility stations' callsigns as well!

8454.8 kHz FUG French Navy Saissac, France
New 2020 edition of our Perseus Frequency Database
now shows utility stations' callsigns as well!

6095.0 kHz Broadcast (!) radio station KBC, Netherlands via Germany
testing state-of-the-art digital data signals
such as parallel MFSK emissions on 6093.5 and 6096.5 kHz
i.e. on both sidebands ± 1500 Hz from the carrier frequency 6095.0 kHz
New 2020 edition of our Perseus Frequency Database
now shows utility stations' callsigns as well!

18529.5 kHz 7RV50 Algerian Embassy Moscow, Russian Federation, to 7RQ20 Ministry of Foreign Affairs El Djaza'ir, Algeria

18063.3 kHz RC2JAL International Committee of the Red Cross Jalalabad, Afghanistan, via MB1TBI International Committee of the Red Cross Tbilisi, Georgia, to RC2KAB International Committee of the Red Cross Kabul, Afghanistan

13973.0 kHz RC2PES International Committee of the Red Cross Peshawar, Pakistan, via MB1TBI International Committee of the Red Cross Tbilisi, Georgia, to RC2MAZ International Committee of the Red Cross Mazar-e Sherif, Afghanistan

More than 18,000 (eighteen thousand!) fascinating screenshots are available on our unique Digital Data Decoder Screenshots USB Stick!