SM5UYV — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving SM5UYV, decoded by SO8OO in southeastern Poland. 14 FT8 messages attributed to this token as transmitter, on 40m, across 1 UTC dates in the available aggregate history. Last observed 2026-09-18.
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 14 FT8 messages attributed to SM5UYV as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -19 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 14 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -19 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 9, moderate (-15 to -9 dB) 5, 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 SM5UYV in decoded directed-looking exchanges:
Most frequent locator attributed to SM5UYV
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
- JO78 · 14 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,048 km (approx.)
- Last such locator decoded
- 2026-09-18 07:44 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 | SM5UYV S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-18 09:10 | 40m | - / -18 | 3Z100PKP | -12 / - | 2 | Partial capture |
| 09-18 07:40 | 40m | -14 / - | HC2GRC | - / - | 5 | Partial capture |
| 09-18 07:33 | 40m | -20 / - | HC2GRC | - / - | 5 | Partial capture |
| 09-18 07:27 | 40m | -20 / - | HC2GRC | - / - | 3 | Partial capture |
| 08-30 14:51 | 20m | - / -4 | G4UJS | +6 / - | 2 | ✓ Closing fragment |
| 08-29 16:06 | 20m | - / -17 | BG7BVI | -7 / - | 3 | ✓ Closing fragment |
| 07-11 16:06 | 20m | - / -9 | EA7GB | -16 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 143800 -19 2025 SM5UYV YO9PH RR73 091730 -23 1729 SM5UYV RR73; DM2GM <...> +00
UTC dB Audio Message 072745 -22 1426 HC2GRC SM5UYV JO78 (x13) 091000 -11 1432 SM5UYV 3Z100PKP -18 (x2)
UTC dB Audio Message 160630 -16 993 SM5UYV EA7GB R-09 (x2) 160600 -6 2216 SM5UYV UN7IV R-16 160630 -7 2040 SM5UYV BG7BVI OL66 (x3) 145145 +6 1455 SM5UYV G4UJS -04 (x2) 145415 -2 1455 SM5UYV M0LAD JO02
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