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.


5583.0 kHz ACARS/HFDL H05 Auckland Air, New Zealand, and flight CAL054

8425.5 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

4219.0 kHz XSQ Guangzhou 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

5508.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + aircraft N583FE + N597FE + N879FD + N887FD
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 CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

4235.0 kHz NMF United States Coast Guard Boston MA, United States of America

4235.0 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 N610UP + N642FE + N891FD
LTAET = Less Than All Engine Taxi
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 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 XA-AMX
The Basic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or data for navigational accuracy

5508.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + flight FX1710

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

518.0 kHz PBK Netherlands Coast Guard Ijmuiden, Netherlands

518.0 kHz SVK Kerkyra Radio, Greece

518.0 kHz EAR La Coruna Radio, Spain

518.0 kHz Centre Regional Operationnel de Surveillance et de Sauvetage Corsen, France

518.0 kHz GPK Portpatrick Radio, United Kingdom

16023.7 kHz Egyptian Embassy Washington DC, United States of America, to Ministry of Foreign Affairs Cairo, Egypt

10060.0 kHz ACARS/HFDL H10 Muan Air, South Korea, + aircraft B-6330 + HL8286 + VP-BWK + VQ-BRH
HIRO = High Intensity Runway Operation
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!

17919.0 kHz ACARS/HFDL H16 Barrigada Air, Guam, + aircraft B-5939 + B-18918 + C-FGDX + PK-GFW + VP-BBL
AI = Arrival Information
GC = Ground Connections
DI = Departure Information
VSC = Vacuum System Controller

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

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

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

11387.0 kHz ACARS/HFDL H04 Riverhead Air NY, United States of America, + flight UAL280

5514.0 kHz ACARS/HFDL H02 Hoolehua Air, Molokai, Hawaii, + aircraft HL7639 + JA820A + N581UP + N605UP + N618UP
ECS = Environmental Control System
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 CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

8416.5 kHz NMO United States Coast Guard Honolulu, Hawaii

5514.0 kHz ACARS/HFDL H02 Hoolehua Air, Molokai, Hawaii, + aircraft B-LID + B-2763 + N859FD
Tailwind 121, resulting ground speed 564, not bad!
They reached 596 at 1716Z abeam Tokyo ...
The Basic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or data for navigational accuracy

518.0 kHz JNL Otaru Radio, Japan

5502.0 kHz ACARS/HFDL H10 Muan Air, South Korea, + aircraft B-LRS + N620UP
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!
The Basic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or data for navigational accuracy

5502.0 kHz ACARS/HFDL H10 Muan Air, South Korea, + aircraft N620UP (slightly corrupted ...)
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

5502.0 kHz ACARS/HFDL H10 Muan Air, South Korea, + flight UPS81
If the latest HFDL System Table file is copied into SIGMIRA's "bin" directory,
the GUI displays MUAN - SOUTH KOREA
and the corresponding frequency
1440 Hz pilot tone is clearly visible in the sonagram
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!

13270.0 kHz ACARS/HFDL H06 Hat Yai Air, Thailand, + aircraft B-2300 + B-6009 + B-8337 + 9V-SHM

17919.0 kHz ACARS/HFDL H16 Barrigada Air, Guam, + aircraft B-LNZ + B-6322
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 CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

21949.0 kHz ACARS/HFDL H06 Hat Yai Air, Thailand, + flight CES211
Not bad for the sunspot minimum ...

16971.0 kHz JJC Kyodo Tsushin Tokyo, Japan

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

518.0 kHz LFO Oerlandet Radio, Norway

518.0 kHz GCC Cullercoats Radio, United Kingdom

518.0 kHz EAV Valencia Radio, Spain

5514.0 kHz ACARS/HFDL H02 Hoolehua Air, Molokai, Hawaii, + aircraft B-LJC + C-FNNH + N203UW
AFOB = Actual FOB
ECS = Environmental Control System
EFOB = Estimated FOB
MEL = Minimum Equipment List

5583.0 kHz ACARS/HFDL H05 Auckland Air, New Zealand, + aircraft B-8426
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 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

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 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

3585.0 kHz HLL8 Soul Meteo, South Korea

8416.5 kHz SUZ Serapeum Radio, Egypt

8416.5 kHz SUZ Serapeum Radio, Egypt

7880.0 kHz DDK3 Hamburg Meteo, Germany

7880.0 kHz DDK3 Hamburg Meteo, Germany

7880.0 kHz DDK3 Hamburg Meteo, Germany

7880.0 kHz DDK3 Hamburg Meteo, Germany

10081.0 kHz ACARS/HFDL H03 Reykjavik Air, Iceland, + aircraft B-2098

10081.0 kHz ACARS/HFDL H03 Reykjavik Air, Iceland, + aircraft B-2098 + VP-BIM + VP-BPU + VP-BQJ + VQ-BBC
ECS = Environmental Control System

8977.0 kHz ACARS/HFDL H03 Reykjavik Air, Iceland, + aircraft VP-BDE + VQ-BFU + VQ-BSJ + VQ-BTI + 9V-SMR
VOMH should read VOMM!
The CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

9165.0 kHz HLL Soul Meteo, South Korea

5508.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + aircraft N205UW + N850FD + N893FD
Planned WP - ETO - FL - TAS - FOB
The CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

8834.0 kHz ACARS/HFDL H08 Johannesburg Air, South Africa (Republic of), + aircraft 5Y-CYE + 5Y-KZB
The CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

4681.0 kHz ACARS/HFDL H08 Johannesburg Air, South Africa (Republic of), + flight UAE2AR

8582.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil
SHIP/SYNOP decoding see Radio Data Code Manual page 299
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

8582.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

4209.5 kHz XVG Hai Phong Radio, Viet Nam

8569.8 kHz FUV French Navy Jibuti, Djibouti

10084.0 kHz ACARS/HFDL H05 Auckland Air, New Zealand, + aircraft JA895A + VQ-BBD
The CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

13270.0 kHz ACARS/HFDL H06 Hat Yai Air, Thailand, + aircraft B-30A7 + B-6361 + PK-GFF + PK-GFX

13270.0 kHz ACARS/HFDL H06 Hat Yai Air, Thailand, + aircraft B-LIF + B-302G
BTMS = Brake Temperature Monitoring System

13270.0 kHz ACARS/HFDL H06 Hat Yai Air, Thailand, + aircraft HL8213 + PK-GFF + PK-GNM + VT-IFP + 9V-SHG
The CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

5583.0 kHz ACARS/HFDL H05 Auckland Air, New Zealand, + flight CAL058
1440 Hz pilot tone is clearly visible in the sonagram

4209.5 kHz XVG Hai Phong Radio, Viet Nam

4209.5 kHz XSQ Guangzhou Radio, China
What those megalomaniac Communist Chinese call "Zengmu Ansha Reef"
is in fact James Shoal, recognized by the Brits in the early 19th Century
and listed on the British Admiralty Chart in the 1870s (!).
Needless to say, located a mere 83 kilometres off Bintulu in Sarawak,
BETING SERUPAI belongs perfectly to the continental shelf and EEZ of MALAYSIA,
and has never repeat NEVER been a territory of Communist "China"
that is more than 1,800 kilometres repeat
MORE THAN ONE THOUSAND EIGHT HUNDRED KILOMETRES away!
Tak boleh tahan lah!!

8454.0 kHz UIW Kaliningrad Radio, Russian Federation

8454.0 kHz UIW Kaliningrad Radio, Russian Federation
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

6535.0 kHz ACARS/HFDL H06 Hat Yai Air, Thailand, + aircraft 9V-SHL
The CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

10084.0 kHz ACARS/HFDL H05 Auckland Air, New Zealand, + aircraft N620FE + PR-TYJ
PDC = Pre-Departure Clearance

10543.0 kHz RCV Commonwealth of Independent States Navy Sevastopol', Ukraine
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

12669.8 kHz Digital data station

3585.0 kHz HLL8 Soul Meteo, South Korea

518.0 kHz UFL Vladivostok Radio SE, Russian Federation

518.0 kHz Byunsan Radio, South Korea

518.0 kHz XSV Tianjin Radio, China

518.0 kHz XSG Shanghai Radio, China

11312.0 kHz ACARS/HFDL H02 Hoolehua Air, Molokai, Hawaii, + flight CPA328

518.0 kHz HSA Bangkok Radio, Thailand

518.0 kHz 9WW21 Miri Radio, Sarawak, Malaysia

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

10081.0 kHz ACARS/HFDL H07 Shannon Air, Ireland, + aircraft HZ-NS26 + VP-BAY + VP-BQB + VQ-BSL + VQ-BST

16285.0 kHz STAT152 Digital data station

9982.5 kHz KVM70 Honolulu Meteo, Hawaii

9982.5 kHz KVM70 Honolulu Meteo, Hawaii

8424.0 kHz SVO Olympia Radio, Athens, Greece

8977.0 kHz ACARS/HFDL H03 Reykjavik Air, Iceland, + flight UAE41P

8977.0 kHz ACARS/HFDL H03 Reykjavik Air, Iceland, + aircraft ET-ATL + PR-TYN
The Basic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or data for navigational accuracy

518.0 kHz 9HD Valetta Radio, Malta

5508.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + aircraft N624FE
DFDAU = Digital Flight Data Acquisition Unit
DFDR = Digital Flight Data Recorder
EGTM = Exhaust Gas Temperature Margin
ISFC = Indicated Specific Fuel Consumption
OATL = Outside Air Temperature Limit
VGMN = Vertical G Minimum During Flight
VGMX = Vertical G Maximum During Flight
VGTD = Vertical G During Touch Down

5508.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + aircraft N624FE + N38955

5508.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + aircraft N586FE

5508.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + aircraft N601FE + N642FE

5508.0 kHz ACARS/HFDL H01 San Francisco Air CA, United States of America, + aircraft C-FRTG + N576UP + N857FD + N890FD + N27965
ECS = Environmental Control System
LRA = Landing Radio Altimeter
RA = Radio Altimeter
The 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 L2T Argentinian Coast Guard Mar del Plata, Argentina

518.0 kHz L2N Argentinian Coast Guard Bahia Blanca, Argentina

8416.5 kHz UAT Moscow Radio, Russian Federation

5583.0 kHz ACARS/HFDL H05 Auckland Air, New Zealand, + aircraft B-17805 + C-FVNF + VT-IEK

6652.0 kHz ACARS/HFDL H16 Barrigada Air, Guam, + aircraft B-KPS + JA878A + N869FD
The Basic Report gives position - trajectory intent - speed vector data
plus the Figure of Merit code or data for navigational accuracy

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

9459.0 kHz ZKLF Auckland Meteo, New Zealand

518.0 kHz NOJ United States Coast Guard Kodiak, Alaska

518.0 kHz VAU Canadian Coast Guard Chebogue NS, Canada

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

6652.0 kHz ACARS/HFDL H16 Barrigada Air, Guam, + flight CCA868

10093.0 kHz ACARS/HFDL H09 Barrow Air, Alaska, + aircraft B-LJD
Parameters ...
ECS = Environmental Control System

5514.0 kHz ACARS/HFDL H02 Hoolehua Air, Molokai, Hawaii, + aircraft N859FD
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

8425.5 kHz XSG Shanghai Radio, China

8302.0 kHz XSG Shanghai Radio, China

8302.0 kHz XSG Shanghai Radio, China

10081.0 kHz ACARS/HFDL H07 Shannon Air, Ireland, + aircraft VP-BAY + 5Y-CYE
EENT = ETOPS Entry Point
EEXT = ETOPS Exit Point
ETP = Equal Time Point

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

16963.3 kHz FUF French Navy Fort de France, Martinique

518.0 kHz LGQ Rogaland Radio, Norway

518.0 kHz EJK Irish Coast Guard Valentia, Ireland

8699.2 kHz CTA North Atlantic Treaty Organization Lisbon, Portugal

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

5514.0 kHz ACARS/HFDL H02 Hoolehua Air, Molokai, Hawaii, + aircraft B-2035 + JA15KZ + JA832A + VP-BUO
The 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

7795.0 kHz JMH2 Tokyo Meteo, Japan

6450.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

6450.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

4209.5 kHz XSG Shanghai Radio, China
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-304P + B-8599 + 9V-SHD
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

2610.2 kHz FUO French Navy Toulon, France

17151.2 kHz NMC United States Coast Guard San Francisco CA, United States of America
ITCZ = Inter-Tropical Convergence Zone

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

10081.0 kHz ACARS/HFDL H07 Shannon Air, Ireland, + aircraft ET-ARE + VP-BRH + VQ-BHQ + VT-IFU
AI = Arrival Information
DI = Departure Information
GC = Ground Connections
DA = Departure Airport
DS = Destination Airport
The CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

17928.0 kHz ACARS/HFDL H17 Telde Air, Canary Islands, + aircraft F-HRBG + ZS-SXM
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)
The CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

11312.0 kHz ACARS/HFDL H02 Hoolehua Air, Molokai, Hawaii, + aircraft B-LIC + N512AS
BTMS = Brake Temperature Monitoring System
AA = Arrival Airport
DA = Departure Airport

12789.9 kHz NMG United States Coast Guard New Orleans LA, United States of America

518.0 kHz JNX Kushiro Radio, Japan

11387.0 kHz ACARS/HFDL H04 Riverhead Air NY, United States of America, + aircraft CC-CXC + HP1723

8912.0 kHz ACARS/HFDL H04 Riverhead Air NY, United States of America, + aircraft A7-ANA + C-GHPN + RPC8784 + VQ-BMY
The CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

8912.0 kHz ACARS/HFDL H04 Riverhead Air NY, United States of America, + aircraft N289AY
Routing calculation = WP + ETO + FL + SPEED + FOB
RVSM = Reduced Vertical Separation Minima

6661.0 kHz ACARS/HFDL H04 Riverhead Air NY, United States of America, + aircraft CC-BGJ + PR-AIS + 50003B
The CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

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

518.0 kHz ICH Italian Coast Guard La Maddalena Island, Italy

518.0 kHz SVL Limnos Radio, Greece

8977.0 kHz ACARS/HFDL H03 Reykjavik Air, Iceland, + aircraft JY-AYV + JY-AYX
MMR = Multi-Mode Receiver
The CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here

3585.0 kHz HLL8 Soul Meteo, South Korea

4209.5 kHz TAH Istanbul Radio, Turkey

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!

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!

6652.0 kHz ACARS/HFDL H16 Barrigada Air, Guam, + aircraft JA838A + N606UP + N615UP + N618UP + VQ-BGZ
ECS = Environmental Control System
The CPDLC ADS-C message headers
- such as "UM130" - are defined e.g. in
ICAO's Global Operational Data Link Manual here or here

486.0 kHz XSV Tianjin Radio, China
Chinese teleprinter code after Latin alphabet header

8416.5 kHz UFZ Vladivostok Radio SE, Russian Federation

518.0 kHz NMO United States Coast Guard Honolulu, Hawaii

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

8416.5 kHz LGS Svalbard Radio, Spitsbergen, Norway

13321.0 kHz ACARS/HFDL H08 Johannesburg Air, South Africa (Republic of), + aircraft HZ-AQK + UR-CSU + 5Y-CYC + 9N-ALM
DA = Departure Airport
DAR = Data Access Recorder
DS = Destination Airport

8454.8 kHz FUG French Navy Saissac, France
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

4209.5 kHz XVN Nha Thrang Radio, Viet Nam

4209.5 kHz XSV Tianjin Radio, China

5502.0 kHz ACARS/HFDL H10 Muan Air, South Korea, + aircraft B-6321+ JA219A + VN-A620
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 L2G Argentinian Coast Guard Buenos Aires, Argentina

3622.5 kHz JMH Tokyo Meteo, Japan

518.0 kHz VRX Hong Kong Radio, China

518.0 kHz JGC Yokohama Radio, Japan

518.0 kHz JNR Moji Radio, Japan

518.0 kHz XVT Da Nang Radio, Viet Nam

518.0 kHz XVS Ho Chi Minh City Radio, Viet Nam

518.0 kHz IQM Mondolfo Radio, Italy
Sembra ke almeno parzialmente hanno sbagliato
di non tradurre Italiaaaaaaaaano (dalle 490 kHz) x Inglese ...
Sperumma ke si svegliano presto ;-))

10081.0 kHz ACARS/HFDL H07 Shannon Air, Ireland, + aircraft P4-MES + VP-BMM + VQ-BWB
AI = Arrival Information
DI = Departure Information
GC = Ground Connections

5720.0 kHz ACARS/HFDL H03 Reykjavik Air, Iceland, + aircraft CN-RGB + OY-KAO
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

16559.0 kHz XSG Shanghai Radio, China

6619.0 kHz ACARS/HFDL H10 Muan Air, South Korea, + flight CPA216
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!

8446.5 kHz MKG Digital data station, India

518.0 kHz LZW Varna Radio, Bulgaria

518.0 kHz RFA Astrakhan Radio, Russian Federation

518.0 kHz OXJ Torshavn Radio, Faroe Islands, Denmark

518.0 kHz EJM Irish Coast Guard Malin Head, Ireland

4272.8 kHz FUJ French Navy Noumea, New Caledonia

11017.7 kHz Digital data station
A specially formatted sample Klingenfuss frequency database
is perfectly integrated in the go2MONITOR GUI

518.0 kHz Parangipettai Radio, India

518.0 kHz Muttam Point Radio, India

4583.0 kHz DDK2 Hamburg Meteo, Germany
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 AIJ274

518.0 kHz 9MG Georgetown Radio, Pinang Island, Malaysia

518.0 kHz XSQ Guangzhou Radio, China

3622.5 kHz JMH Tokyo Meteo, Japan

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

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

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!
These fellers just don't get it!

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

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

518.0 kHz Sandakan Radio, Sabah, Malaysia

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

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

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

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

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 ...

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

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

518.0 kHz DZX Manila Radio, Philippines

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

16067.7 kHz Ministry of Foreign Affairs Cairo, Egypt

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

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

5156.8 kHz TBB Turkish Navy Ankara, Turkey

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!
These fellers just don't get it!

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

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

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

4232.5 kHz Digital data station, Japan

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

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

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

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

490.0 kHz UUI Odessa Radio, Ukraine

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 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

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!

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

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

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 ...

8416.5 kHz NMO United States Coast Guard Honolulu, Hawaii

518.0 kHz Izmir Radio, Turkey

518.0 kHz Hamburg Meteo, Germany

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

10100.8 kHz DDK9 Hamburg Meteo, Germany

490.0 kHz 9AS Split Radio, Croatia

490.0 kHz GNI Niton Radio, United Kingdom

8416.5 kHz L2C Argentinian Coast Guard Buenos Aires, Argentina

8319.0 kHz 4XZ Israeli Navy Haifa, Israel

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

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

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

518.0 kHz EQM Bushire Radio, Iran

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

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 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

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 VFF Canadian Coast Guard Iqaluit NUN, Canada

12840.5 kHz PBB Dutch Navy Den Helder, Netherlands

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

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 Porto Santo Radio, Madeira
POST = Porto Santo

518.0 kHz EAL Las Palmas Radio, Canary Islands

518.0 kHz DZX Manila Radio, Philippines

8416.5 kHz VFF Canadian Coast Guard Iqaluit NUN, Canada

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

8582.0 kHz PWZ Brazilian Navy Rio de Janeiro, Brazil

4154.0 kHz Digital data station, Japan

13315.0 kHz ACARS/HFDL H13 Santa Cruz Air, Bolivia, + aircraft B-2787 + B-6097 + F-HPJH + PR-YYF + 9V-SMC
The 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

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

518.0 kHz LGP Bodoe Radio, Norway

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 19,000 (nineteen thousand!) fascinating screenshots are available on our unique Digital Data Decoder Screenshots USB Stick!