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
2025-04-15T06:21:59+00:00
11348
13324
21937
9
Barrow, Alaska
📌 71.25849, -156.577447
2025-04-15T06:22:06+00:00
17934
1
San Francisco, California
📌 38.384587, -121.759647
2025-04-15T06:22:12+00:00
6559
17919
11
Albrook, Panama
📌 9.084681, -79.373969
2025-04-15T06:21:59+00:00
10063
4
Riverhead, New York
📌 40.881922, -72.63762
2025-04-15T06:20:18+00:00
11387
13276
13
Santa Cruz, Bolivia
📌 -17.671199, -63.157088
2025-04-15T06:21:59+00:00
11318
21997
3
Reykjavik, Iceland
📌 63.847168, -22.455754
2025-04-15T06:20:48+00:00
8977
15025
17
Canarias, Spain
📌 27.960945, -15.405608
2025-04-15T06:02:27+00:00
13303
17928
7
Shannon, Ireland
📌 52.744089, -8.926752
2025-04-15T06:22:06+00:00
8942
8
Johannesburg, South Africa
📌 -26.129658, 28.206078
2025-04-15T06:21:39+00:00
8834
21949
15
Al Muharraq, Bahrain
📌 26.268773, 50.648978
2025-04-15T06:21:39+00:00
17967
21982
14
Krasnoyarsk, Russia
📌 56.152603, 92.583337
2025-04-15T06:21:39+00:00
21990
6
Hat Yai, Thailand
📌 6.937536, 100.388451
2025-04-15T06:21:34+00:00
5655
13270
10
Muan, South Korea
📌 35.032377, 126.238644
2025-04-15T06:22:06+00:00
17958
21931
16
Agana, Guam
📌 13.488833, 144.828233
2025-04-15T06:22:12+00:00
5451
11306
21928
5
Auckland, New Zealand
📌 -37.015757, 174.809637
2025-04-15T06:21:49+00:00
13351
17916
Source Data. Last update 2025-04-15T06:02:27+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 196
KD-PANC-HFDL 182
LOT-HFDL-PHNG 163
AL-LFBP-HFDL 148
RG_EGHQ_HFDL_1_8-10 66
RG_EGHQ_HFDL_4_11-15 7
CO-CYTZ2-HFDL 0
RG_EGHQ_HFDL_2_5-6 0
RG_EGHQ_HFDL_3_17-21 0
*CO-CYTZ2-HFDL 0
CO-CYTZ-HFDL 0
*AU-YBBN-HFDL 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)
AL-LFBP-HFDL 45
AU-YBBN-HFDL 26
RG_EGHQ_HFDL_1_8-10 26
RG_EGHQ_HFDL_4_11-15 26
KD-PANC-HFDL 15
RG_EGHQ_HFDL_2_5-6 3
CO-CYTZ2-HFDL 3
LOT-HFDL-PHNG 2
RG_EGHQ_HFDL_3_17-21 0
*CO-CYTZ2-HFDL 0
CO-CYTZ-HFDL 0
*AU-YBBN-HFDL 0