hfdl.observer

high frequency data link

Ground Stations

Live status of HFDL ground stations and the frequencies they are currently listening and heard on. This can be used to help you tune your HFDL decoder at this exact moment. Frequencies in kHz.
IDNameUpdated
2
Molokai, Hawaii
📌 21.184428, -157.186846
2025-02-08T14:54:14+00:00
6565
10027
11348
9
Barrow, Alaska
📌 71.25849, -156.577447
2025-02-08T14:54:34+00:00
6646
1
San Francisco, California
📌 38.384587, -121.759647
2025-02-08T14:54:34+00:00
5508
6559
11
Albrook, Panama
📌 9.084681, -79.373969
2025-02-08T14:54:02+00:00
10063
4
Riverhead, New York
📌 40.881922, -72.63762
2025-02-08T14:54:14+00:00
8912
21931
13
Santa Cruz, Bolivia
📌 -17.671199, -63.157088
2025-02-08T14:54:34+00:00
17916
21997
3
Reykjavik, Iceland
📌 63.847168, -22.455754
2025-02-08T14:52:11+00:00
15025
17985
17
Canarias, Spain
📌 27.960945, -15.405608
2025-02-08T14:52:58+00:00
13303
21955
7
Shannon, Ireland
📌 52.744089, -8.926752
2025-02-08T14:54:06+00:00
8942
8
Johannesburg, South Africa
📌 -26.129658, 28.206078
2025-02-08T14:54:34+00:00
13321
21949
15
Al Muharraq, Bahrain
📌 26.268773, 50.648978
2025-02-08T14:37:22+00:00
17967
21982
14
Krasnoyarsk, Russia
📌 56.152603, 92.583337
2025-02-08T14:54:34+00:00
10087
6
Hat Yai, Thailand
📌 6.937536, 100.388451
2025-02-08T14:54:12+00:00
5655
13270
10
Muan, South Korea
📌 35.032377, 126.238644
2025-02-08T14:54:06+00:00
8939
13342
16
Agana, Guam
📌 13.488833, 144.828233
2025-02-08T14:50:10+00:00
8927
11306
21928
5
Auckland, New Zealand
📌 -37.015757, 174.809637
2025-02-08T14:54:34+00:00
10084
13351
Source Data. Last update 2025-02-08T14:52:58+00:00.
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[SPDU] Squitter Count

"Squitters" are sent out every 32 seconds by Ground Stations and provide regular, progressive updates of the active frequency list you see here.
(last hour)
AU-YBBN-HFDL 166
RG_EGHQ_HFDL_3_17-21 142
CO-CYTZ2-HFDL 107
RG_EGHQ_HFDL_1_8-10 66
AL-LFBP-HFDL 43
KD-PANC-HFDL 17
LOT-HFDL-PHNG 8
RG_EGHQ_HFDL_2_5-6 0

[HFNPDU] Performance Data Count

Performance Report packets are sent by aircraft, and include frequencies that they have heard Ground Stations on recently. This data is used as a backstop in case station updates via squitters are unavailable.
(last hour)
RG_EGHQ_HFDL_3_17-21 291
AL-LFBP-HFDL 31
RG_EGHQ_HFDL_1_8-10 28
CO-CYTZ2-HFDL 26
KD-PANC-HFDL 20
AU-YBBN-HFDL 13
LOT-HFDL-PHNG 2
RG_EGHQ_HFDL_2_5-6 0