UR4UUA — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving UR4UUA, decoded by SO8OO in southeastern Poland. 15 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-26 and 2026-08-28.
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 15 FT8 messages attributed to UR4UUA as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (80%), followed by 40 m (20%). In this small sample, the estimated median decoder S/N was -10 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-08-28 20:33 UTC
Observed FT8 message patterns
- Attributed sample
- 15 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- -10 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 7, 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. 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 UR4UUA in decoded directed-looking exchanges:
Most frequent locator attributed to UR4UUA
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
- KO50 · 9 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 658 km (approx.)
- Last such locator decoded
- 2026-08-28 20:32 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 | UR4UUA S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-28 20:32 | 40m | +1 / -5 | GJ0KYZ | +6 / -8 | 5 | ✓ Full exchange observed |
| 08-23 18:19 | 20m | -11 / -11 | PD4RJ | -10 / -15 | 4 | ✓ Full exchange observed |
| 08-23 18:16 | 20m | -7 / -14 | EC3A | +3 / - | 3 | ✓ Closing observed |
| 08-23 18:14 | 20m | - / -16 | PD5MVH | +6 / - | 4 | Partial capture |
| 08-23 18:13 | 20m | -14 / - | 4X1UF | - / -22 | 4 | Partial capture |
| 06-26 09:46 | 20m | -15 / -15 | UR5UU | -17 / - | 5 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 203230 +2 1301 GJ0KYZ UR4UUA KO50 203245 +5 2615 UR4UUA GJ0KYZ -05 203300 +4 1301 GJ0KYZ UR4UUA R-08 203315 +6 2614 UR4UUA GJ0KYZ RR73 203330 -3 1301 GJ0KYZ UR4UUA 73
UTC dB Audio Message 181330 -10 2310 4X1UF UR4UUA KO50 (x2) 181415 -8 2316 UR4UUA PD5MVH -16 (x2) 181500 -23 2307 4X1UF UR4UUA R-22 181515 +11 2316 UR4UUA PD5MVH -16 (x2) 181645 +6 586 UR4UUA EC3A -14 (x2) 181730 -7 2303 EC3A UR4UUA 73 181800 -4 2302 CQ UR4UUA KO50 181900 -10 2301 PD4RJ UR4UUA KO50 182015 -10 1427 UR4UUA PD4RJ -11 182030 -12 2298 PD4RJ UR4UUA R-15 (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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