F5SLD — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving F5SLD, decoded by SO8OO in southeastern Poland. 52 FT8 messages attributed to this token as transmitter, on 10m, across 2 UTC dates in the available aggregate history. Observed between 2026-07-07 and 2026-08-18.
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 52 FT8 messages attributed to F5SLD as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (100%). In this small sample, the estimated median decoder S/N was -9 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 52 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -9 dB
- Estimated 10th-90th percentile
- -13 to -3 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 25, strong (≥ -8 dB) 26.
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 F5SLD in decoded directed-looking exchanges:
Most frequent locator attributed to F5SLD
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
- JO10 · 23 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,335 km (approx.)
- Last such locator decoded
- 2026-08-18 11:15 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 | F5SLD S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-18 11:13 | 10m | -15 / - | MM7FTH | - / -2 | 3 | ✓ Closing fragment |
| 08-18 11:12 | 10m | -12 / - | <...> | - / - | 2 | Partial capture |
| 08-18 11:09 | 10m | -9 / - | GM0VGI | - / -16 | 3 | ✓ Closing fragment |
| 08-18 11:07 | 10m | -9 / - | <...> | - / - | 2 | Partial capture |
| 08-18 10:04 | 10m | -6 / - | D2UY | - / +6 | 3 | ✓ Closing fragment |
| 08-18 09:58 | 10m | -7 / - | VU2DED | - / -7 | 7 | ✓ Closing fragment |
| 08-18 09:57 | 10m | -8 / - | GB8VJ | - / +6 | 2 | ✓ Closing fragment |
| 08-18 09:56 | 10m | -2 / -12 | SV7BAY | -11 / -10 | 5 | ✓ Full exchange observed |
| 08-18 09:53 | 10m | -12 / - | DO8SD | - / +2 | 3 | ✓ Closing fragment |
| 08-11 08:45 | 10m | - / +1 | UA4FKT | -18 / - | 2 | ✓ Closing fragment |
| 07-07 14:22 | 10m | -10 / - | EA1E | - / - | 2 | Partial capture |
| 07-07 14:19 | 10m | -10 / - | EI9JM | - / -1 | 3 | ✓ Closing fragment |
| 07-07 14:16 | 10m | -12 / - | CX7AT | - / -11 | 4 | ✓ Closing fragment |
| 07-07 14:11 | 10m | -8 / - | CX5ABM | - / -10 | 5 | Partial capture |
| 07-07 14:09 | 10m | -4 / - | SP9LS | - / - | 3 | ✓ Closing fragment |
| 07-07 14:08 | 10m | -7 / - | SP6SOZ | - / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 100415 -4 814 D2UY F5SLD JO10 (x3) 110715 -13 729 <...> F5SLD JO10 (x2) 110900 -11 729 GM0VGI F5SLD JO10 (x3) 111115 -6 656 F6BNX F5SLD JO10 111200 -13 1087 <...> F5SLD JO10 (x2) 111330 -13 1087 MM7FTH F5SLD JO10 (x3) 111545 -6 1087 F6BNX F5SLD JO10
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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