WO3U — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FN00

Receiver-side FT8 activity involving WO3U, decoded by SO8OO in southeastern Poland. 37 FT8 messages attributed to this token as transmitter, on 60m, 20m, across 12 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-09-07.

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 37 FT8 messages attributed to WO3U as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (97%), followed by 60 m (3%). Most decodes (100%) fell within the six-hour window 21:00-03:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's moderate S/N range (62%); the estimated median was -11 dB.

Overview

37
Messages attributed
12
UTC dates decoded
15
Active 15-min windows
-11 dB
Estimated median S/N

Bands

60m · 1 20m · 36
First attributed message: 2026-06-09
Last attributed message: 2026-09-07 02:30 UTC

Observed FT8 message patterns

Attributed sample
37 messages
Active dates
12 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-19 to -4 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 23, strong (≥ -8 dB) 9.

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 WO3U 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 WO3U

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
FN00 · 22 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
7,348 km (approx.)
Last such locator decoded
2026-08-28 22:16 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 UTCBandWO3U S/NCounterpartCounterpart S/NMsgsCapture
09-20 00:03 40m - / -12 F5NBU +9 / - 3 ✓ Closing fragment
09-19 01:51 60m - / - EA1IOK +1 / - 5 Partial capture
09-19 01:36 40m - / - M9RPO -4 / - 2 Partial capture
09-19 01:31 40m - / - F4HXJ -3 / - 2 Partial capture
09-19 00:52 40m - / - F4HXJ -4 / - 2 Partial capture
09-19 00:51 40m - / -17 EB1LA -6 / - 5 Partial capture
09-18 02:18 40m - / -19 RN4LP +12 / - 2 Partial capture
09-17 01:06 60m - / -10 LA9JKA -12 / - 2 ✓ Closing fragment
09-16 02:08 80m - / -16 EC3A -6 / - 2 Partial capture
09-16 01:47 60m - / -2 HB9SNR -1 / - 3 ✓ Closing fragment
09-16 01:46 60m - / -10 OE7UU -12 / - 2 ✓ Closing fragment
09-14 02:05 60m - / -20 YO3APJ -3 / - 2 ✓ Closing fragment
09-14 02:03 60m - / -19 HA7TM -15 / - 3 ✓ Closing fragment
09-14 01:59 60m - / - F5MXH -3 / - 2 ✓ Closing fragment
09-14 01:59 60m - / -6 PE1MHY -4 / - 3 ✓ Closing fragment
09-13 02:20 40m - / -15 HK3W -14 / - 3 ✓ Closing fragment
09-13 01:55 60m - / -14 ON8DX -20 / - 2 ✓ Closing fragment
09-13 01:49 60m - / -14 HB9EFK +6 / - 2 ✓ Closing fragment
09-13 01:42 60m - / -2 F5HNQ +2 / - 3 ✓ Closing fragment
09-13 01:42 60m - / -16 G0AZH -5 / - 7 Partial capture
09-11 03:23 60m - / -6 HB9ALO -8 / - 4 ✓ Closing fragment
09-11 02:17 40m - / -13 D44TWO -16 / - 2 ✓ Closing fragment
09-11 02:12 40m - / -10 D44TWO -19 / - 3 ✓ Closing fragment
09-08 02:24 80m - / - K4YT -11 / - 5 Partial capture
09-08 02:07 80m - / -18 G0VDZ 0 / - 4 ✓ Closing fragment
09-08 01:52 80m - / -12 UX5UO +15 / - 2 ✓ Closing fragment
09-08 01:31 60m - / -5 F5MYK -12 / - 3 ✓ Closing fragment
09-07 02:30 60m - / -16 F5RRS +2 / - 3 ✓ Closing fragment
09-06 01:57 60m - / - EW8CW -3 / - 3 Partial capture
09-06 01:29 60m - / -8 DK7ZT -13 / - 2 Partial capture
09-06 01:22 60m - / -20 ER3UA -11 / - 7 ✓ Closing fragment
09-05 22:04 60m - / +3 VE1YX -15 / - 2 ✓ Closing fragment
09-04 02:10 60m - / -11 4X1UF -3 / - 3 ✓ Closing fragment
09-04 02:06 60m - / -3 S57MPU -4 / - 6 ✓ Closing fragment
09-04 02:05 60m - / -9 ON8BB +3 / - 4 ✓ Closing fragment
09-04 02:04 60m - / -2 S56P -3 / - 3 ✓ Closing fragment
09-04 01:55 40m - / -18 A41KB -8 / - 6 Partial capture
09-04 01:28 40m - / -10 ON1JP -18 / - 3 Partial capture
08-30 19:01 20m - / -18 F4JZW +4 / - 6 ✓ Closing fragment
08-28 23:02 20m - / -12 EA7JCR +2 / - 2 ✓ Closing fragment
08-28 22:13 20m - / -14 LZ2INP +20 / - 3 ✓ Closing fragment
08-28 01:51 40m - / - SV1DKR -9 / - 2 Partial capture
08-28 01:37 40m - / -13 EA7R +6 / - 2 ✓ Closing fragment
08-27 11:56 20m - / -16 GB4LD 0 / - 4 ✓ Closing fragment
08-27 01:11 40m - / -22 SP2GG -15 / - 5 Partial capture
08-26 13:43 20m - / -22 F1ODM -8 / - 3 Partial capture
08-26 02:44 60m - / -9 SM4IED -5 / - 2 ✓ Closing fragment
08-24 18:51 20m - / -6 DL1EMV +5 / - 6 ✓ Closing fragment
08-24 11:48 20m - / -14 F6ARS -12 / - 2 Partial capture
08-23 20:04 20m - / -5 S57ESG +4 / - 5 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
021830 +11 1082  WO3U RN4LP -19
005130  -4 1470  WO3U EB1LA IN73 (x2)
005230  -9 2996  WO3U F4HXJ IN87
005230  -6 1470  WO3U EB1LA IN73
005300  +1 2996  WO3U F4HXJ IN87
005300  -8 1470  WO3U EB1LA R-17 (x2)
013130  -7 2996  WO3U F4HXJ IN87 (x2)
013600  -3 2354  WO3U M9RPO IO82 (x2)
000300  +0 2650  WO3U F5NBU JN28 (x3)
60m 
UTC    dB Audio  Message
020545  -5 2259  WO3U YO3APJ RR73
014630 -12 1618  WO3U OE7UU -10
014730  -2 1984  WO3U HB9SNR JN36
014800 -12 1618  WO3U OE7UU RR73
014800  +1 1984  WO3U HB9SNR R-02 (x2)
174930  -1 2768  WO3U DG0OAT JO62
010615 -11 1409  WO3U LA9JKA -10 (x2)
015145  +1  481  WO3U EA1IOK IN62
015215 -23 1779  WO3U OS4K -12
015215  +1  481  WO3U EA1IOK IN62 (x4)
80m 
UTC    dB Audio  Message
023530 -16  426  WO3U TJ1GD/P RR73
015200 +17 1327  WO3U UX5UO -12 (x2)
020730  -3 2708  WO3U G0VDZ -18 (x4)
022445  -9 2033  WO3U K4YT FM19 (x5)
013800 -24 1607  WO3U AD8IO RR73
020815  -8 1664  WO3U EC3A -16 (x2)
20m 
UTC    dB Audio  Message
221315  -2  929  WO3U HB9JNM JN47
221345 +18  491  WO3U LZ2INP KN34 (x3)
221600 -15 2683  PY5QW WO3U FN00
221745 -12 2684  WO3U DH2RL JN68
230215  +3 2670  WO3U EA7JCR -12 (x2)
230445 +10  280  WO3U EA5ITW -18
190115  +7  966  WO3U F4JZW JN08 (x6)

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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