KG4USN — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Guantanamo Bay Most frequent locator attributed to this token: FM19

Receiver-side FT8 activity involving KG4USN, decoded by SO8OO in southeastern Poland. 94 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-19.

These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.

SO8OO decoded 94 FT8 messages attributed to KG4USN as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (67%), followed by 80 m (33%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's moderate S/N range (71%); the estimated median was -13 dB.

Overview

94
Messages attributed
7
UTC dates decoded
13
Active 15-min windows
-13 dB
Estimated median S/N

Bands

80m · 31 40m · 63
First attributed message: 2026-06-07
Last attributed message: 2026-09-19 23:56 UTC

Observed FT8 message patterns

Attributed sample
94 messages
Active dates
7 UTC dates
Estimated median S/N
-13 dB
Estimated 10th-90th percentile
-17 to -9 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 20, moderate (-15 to -9 dB) 67, strong (≥ -8 dB) 7.

WSJT-X defines S/N reports against a 2,500 Hz reference noise bandwidth. The ranges above are SO8OO receiver-side display categories, not official WSJT-X classes, transmitter-power measurements or estimates of how easy the station is to hear elsewhere. Statistics include only successful decodes on SO8OO's monitored FT8 channels; transmissions that were not decoded are absent.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with KG4USN in decoded directed-looking exchanges:

Attributed messages by UTC hour

Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.

Most frequent locator attributed to KG4USN

The map compares the centres and boundaries of the locator field attributed to this token by decoded message structure, 2° × 1° as a Maidenhead square, and SO8OO's six-character receiver square. The separation is not an exact antenna-to-antenna distance or a radio-path length.

Attributed locator
FM19 · 39 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
7,310 km (approx.)
Last such locator decoded
2026-09-19 23:56 UTC

A decoded locator can describe portable, remote or special-event operation and is not proof of a permanent station address or transmitter identity.

Observed FT8 exchanges

S/N cells show: decoded at SO8OO / report transmitted by the counterpart. An observed exchange is not a QSL or an official logbook confirmation.

Time UTCBandKG4USN S/NCounterpartCounterpart S/NMsgsCapture
09-19 23:55 80m -20 / - TF3VS - / - 2 Partial capture
09-11 23:54 80m - / - IZ2AMW -11 / - 3 Partial capture
09-11 23:54 80m - / - PA3KUS -4 / - 8 Partial capture
09-11 23:54 80m - / - SP5EXA +23 / - 6 Partial capture
09-08 00:48 80m - / - UX5UO +12 / - 2 Partial capture
09-08 00:47 80m - / - IK0XKP -6 / - 5 Partial capture
09-08 00:44 80m - / - PA3KUS -1 / - 9 Partial capture
09-08 00:39 80m - / - IZ5IMD +2 / - 8 Partial capture
09-08 00:39 80m - / -10 ON1JP -14 / - 5 Partial capture
09-08 00:38 80m - / - F4UJU +4 / - 2 Partial capture
09-08 00:31 80m - / - CT2GQA -18 / - 4 Partial capture
08-21 23:13 80m - / -17 EC3A -14 / - 2 Partial capture
08-20 23:13 40m - / - M0LAD +4 / - 6 Partial capture
08-20 23:08 40m - / -7 SP6VXO -6 / - 4 Partial capture
08-20 23:08 40m - / - DK2BJ -3 / - 3 Partial capture
08-20 23:08 40m - / - PA2KV +8 / - 4 Partial capture
08-14 03:24 80m - / -16 LZ2VQ -12 / - 3 Partial capture
08-14 02:51 80m - / -14 LZ2VQ -6 / - 3 Partial capture
08-14 02:45 80m - / -18 LZ2VQ +5 / - 3 Partial capture
08-14 02:28 80m - / -16 LZ2VQ +7 / - 3 Partial capture
08-14 00:59 80m - / - DO8JB +9 / - 4 Partial capture
08-14 00:59 80m - / -12 LZ2VQ +6 / - 3 Partial capture
08-14 00:57 80m - / - EA2EES -20 / - 8 Partial capture
08-14 00:57 80m - / - YO6BJG +8 / - 2 Partial capture
08-14 00:56 80m - / - DO1ID +16 / - 3 Partial capture
08-14 00:56 80m - / - EA5HM -10 / - 3 Partial capture
08-14 00:55 80m - / -15 GB8VJ -12 / - 2 Partial capture
08-14 00:55 80m - / -19 LZ2VQ +3 / - 3 Partial capture
08-14 00:54 80m - / -14 MM0KQC -2 / - 9 Partial capture
08-11 00:41 80m - / - LA3RLA -24 / - 2 Partial capture
08-11 00:40 80m - / - SP0DF +4 / - 2 Partial capture
08-11 00:35 80m - / -24 SP1MGM +6 / - 2 ✓ Closing fragment
08-11 00:33 80m - / -16 DL1RWN +12 / - 2 ✓ Closing fragment
07-22 00:27 40m - / - UA4FKT -4 / - 2 Partial capture
07-03 00:38 40m - / +5 EA9ABC -20 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

80m 
UTC    dB Audio  Message
235515 -11  739  KG4USN PA3KUS JO21
235515 -12 2007  KG4USN IZ2AMW JN45
235545 +22 2602  KG4USN SP5EXA KO02
235545  -7  739  KG4USN PA3KUS JO21
235545 -11 2007  KG4USN IZ2AMW JN45
235600 -24 1497  CQ KG4USN FM19                        a1
235615 +20 2602  KG4USN SP5EXA KO02
235615  -6  738  KG4USN PA3KUS JO21
235645 +26 2602  KG4USN SP5EXA KO02
235645  -8  739  KG4USN PA3KUS JO21 (x4)
235545 -24 2105  TF3VS KG4USN FM19 (x2)
40m 
UTC    dB Audio  Message
231030  -4 2095  KG4USN SP6VXO -07
231030  +5  393  KG4USN PA2KV JO33
231100  -4 2094  KG4USN SP6VXO -07
231145  -6  393  CQ AS KG4USN FM19
231330 -20 2018  KG4USN MM0DXL IO75
231330  +3  797  KG4USN M0LAD JO02 (x2)
231515 -16 1338  CQ AS KG4USN FM19
231530  +6  798  KG4USN M0LAD JO02
231545 -16 1339  CQ AS KG4USN FM19 (x2)
231700  +5  798  KG4USN M0LAD JO02
231715 -19 1339  CQ AS KG4USN FM19
231730  +4  798  KG4USN M0LAD JO02 (x2)

Decoder S/N history by band

Count-weighted daily averages across messages attributed to this profiled token and successfully decoded at SO8OO, limited to the rolling 90-day UTC chart window.

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