IU3UKU — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving IU3UKU, decoded by SO8OO in southeastern Poland. 11 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-15 and 2026-08-12.
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 11 FT8 messages attributed to IU3UKU as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (82%), followed by 20 m (18%). In this small sample, the estimated median decoder S/N was -21 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-08-12 05:54 UTC
Observed FT8 message patterns
- Attributed sample
- 11 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- -21 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 0.
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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with IU3UKU in decoded directed-looking exchanges:
Most frequent locator attributed to IU3UKU
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
- JN65 · 7 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 821 km (approx.)
- Last such locator decoded
- 2026-08-12 05:54 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 UTC | Band | IU3UKU S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-30 09:13 | 20m | - / -19 | G3ZLG | -7 / - | 3 | Partial capture |
| 08-30 09:11 | 20m | - / -11 | IK0QDM | +4 / - | 4 | ✓ Closing fragment |
| 08-30 09:05 | 20m | - / - | PD3LKN | +6 / - | 2 | Partial capture |
| 08-23 08:30 | 40m | - / +8 | IZ4AIF | -20 / - | 2 | ✓ Closing fragment |
| 06-25 21:30 | 40m | - / - | PD1BER | -16 / - | 3 | Partial capture |
| 06-25 21:26 | 40m | - / -16 | HG8IT | -10 / - | 2 | ✓ Closing fragment |
| 06-25 21:23 | 40m | - / - | PD1BER | -17 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 092900 -18 1581 IU3UKU YO4NF RR73 093115 -24 1580 CQ IU3UKU JN65 ? a1 (x2) 090545 +5 1819 IU3UKU PD9FLX JO22 090545 +5 1580 IU3UKU PD3LKN JO22 (x2) 091115 +4 1307 IU3UKU IK0QDM JN61 (x4) 091315 -9 1749 IU3UKU G3ZLG JO02 (x3)
UTC dB Audio Message 212330 -16 2438 IU3UKU PD1BER JO22 (x3) 212600 -10 1539 IU3UKU HG8IT -16 (x2) 213030 -15 2438 IU3UKU PD1BER JO22 (x3) 083000 -19 1542 IU3UKU IZ4AIF R+08 (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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