S57AT — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving S57AT, decoded by SO8OO in southeastern Poland. 197 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-16 and 2026-09-20.
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 197 FT8 messages attributed to S57AT as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (71%), followed by 40 m (23%) and 80 m (7%). Most decodes (93%) fell within the six-hour window 19:00-01:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (67%); the estimated median was -6 dB.
Overview
Bands
Last attributed message: 2026-09-20 05:32 UTC
Observed FT8 message patterns
- Attributed sample
- 197 messages
- Active dates
- 6 UTC dates
- Estimated median S/N
- -6 dB
- Estimated 10th-90th percentile
- -13 to +3 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 62, strong (≥ -8 dB) 132.
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.
Attributed messages by UTC hour
Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.
Most frequent locator attributed to S57AT
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
- JN76 · 190 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 631 km (approx.)
- Last such locator decoded
- 2026-09-20 05:32 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 | S57AT S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-20 05:27 | 80m | -3 / - | WB8SCG | - / - | 10 | Partial capture |
| 09-20 05:25 | 80m | +5 / - | TF3VS | - / - | 3 | Partial capture |
| 09-20 00:29 | 160m | -3 / - | V26OC | - / - | 11 | Partial capture |
| 09-20 00:13 | 160m | -4 / - | RI1FJZ | - / - | 3 | Partial capture |
| 09-19 23:57 | 160m | -1 / - | RI1FJZ | - / - | 23 | Partial capture |
| 09-19 23:31 | 160m | -6 / -20 | RI1FJZ | -17 / -12 | 39 | Partial capture |
| 09-19 23:23 | 160m | -9 / - | RI1FJZ | - / - | 5 | Partial capture |
| 09-19 23:06 | 160m | -10 / -19 | RI1FJZ | -13 / -15 | 13 | Partial capture |
| 09-14 20:22 | 160m | - / -10 | Z31PM | -12 / - | 2 | Partial capture |
| 09-14 20:21 | 160m | -4 / - | R9SAP | - / - | 2 | Partial capture |
| 09-14 20:09 | 160m | -6 / - | R9SAP | - / - | 5 | Partial capture |
| 09-04 22:53 | 160m | -11 / - | RA9YTI | - / - | 5 | Partial capture |
| 09-04 22:46 | 160m | -12 / - | RA9YTI | - / - | 5 | Partial capture |
| 09-04 22:41 | 160m | -10 / - | RA9YTI | - / - | 5 | Partial capture |
| 09-04 22:34 | 160m | -6 / - | RI1FJL | - / - | 5 | Partial capture |
| 09-04 22:31 | 160m | -6 / - | RA9YTI | - / - | 3 | Partial capture |
| 09-04 22:22 | 160m | -13 / - | RA9YTI | - / - | 10 | Partial capture |
| 09-02 22:19 | 40m | -14 / - | RI1FJL | - / - | 2 | Partial capture |
| 09-02 21:46 | 40m | -11 / - | RI1FJL | - / - | 3 | Partial capture |
| 09-02 21:38 | 40m | -11 / - | RI1FJL | - / - | 5 | Partial capture |
| 09-02 21:12 | 40m | -12 / - | RI1FJL | - / - | 5 | Partial capture |
| 09-02 20:52 | 40m | -1 / - | RI1FJL | - / - | 8 | Partial capture |
| 09-02 20:45 | 40m | -3 / - | RI1FJL | - / - | 5 | Partial capture |
| 09-02 20:35 | 40m | +2 / - | RI1FJL | - / -12 | 13 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 052515 +3 1503 TF3VS S57AT JN76 (x3) 052715 +0 1546 WB8SCG S57AT JN76 (x10)
UTC dB Audio Message 001345 +0 1293 RI1FJZ S57AT JN76 (x4) 002945 -4 2138 V26OC S57AT JN76 (x11)
UTC dB Audio Message 211345 -11 658 RI1FJL S57AT JN76 (x15)
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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