W4FMM — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving W4FMM, decoded by SO8OO in southeastern Poland. 15 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-08-26 and 2026-09-15.
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 W4FMM as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (87%), followed by 40 m (13%). In this small sample, the estimated median decoder S/N was -4 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-09-15 02:25 UTC
Observed FT8 message patterns
- Attributed sample
- 15 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -4 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 10.
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 W4FMM in decoded directed-looking exchanges:
Most frequent locator attributed to W4FMM
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
- FN31 · 7 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 6,913 km (approx.)
- Last such locator decoded
- 2026-09-15 02:25 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 | W4FMM S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-15 02:27 | 40m | - / - | R7BN | -17 / - | 3 | Partial capture |
| 09-15 02:25 | 40m | -16 / - | TK/4O7CC | - / - | 2 | Partial capture |
| 08-26 02:26 | 20m | - / -20 | WA4MB | -16 / - | 4 | ✓ Closing fragment |
| 08-26 02:09 | 20m | -20 / - | EX8ABC | - / - | 2 | Partial capture |
| 08-26 01:07 | 20m | -3 / - | W4KWS | -6 / +7 | 4 | ✓ Closing observed |
| 08-26 01:06 | 20m | -4 / - | R9FF | - / +3 | 2 | ✓ Closing fragment |
| 08-26 01:05 | 20m | 0 / - | UT7UJ | - / +2 | 2 | ✓ Closing fragment |
| 08-26 01:03 | 20m | -1 / - | VU2SW | - / -13 | 4 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 022515 -17 2114 TK/4O7CC W4FMM FN31 (x2) 022700 -15 2113 W4FMM R7BN LN05 (x3)
UTC dB Audio Message 010530 -4 2829 UT7UJ W4FMM R+02 (x2) 010630 +0 2829 R9FF W4FMM +03 (x2) 010715 -6 2829 W4FMM W4KWS EL94 010730 -2 2829 W4KWS W4FMM +07 (x2) 010815 -5 2829 W4FMM W4KWS 73 020930 -21 1754 EX8ABC W4FMM FN31 (x2) 022615 -20 1769 W4FMM WA4MB R-20 (x4) 024815 -13 832 <...> W4FMM FN31
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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