AI5B — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving AI5B, decoded by SO8OO in southeastern Poland. 16 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-07-27 and 2026-09-19.
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 16 FT8 messages attributed to AI5B as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (69%), followed by 40 m (31%). In this small sample, the estimated median decoder S/N was -10 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-09-19 00:00 UTC
Observed FT8 message patterns
- Attributed sample
- 16 messages
- Active dates
- 4 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) 0, moderate (-15 to -9 dB) 10, strong (≥ -8 dB) 6.
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 AI5B in decoded directed-looking exchanges:
Most frequent locator attributed to AI5B
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
- EM50 · 14 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,779 km (approx.)
- Last such locator decoded
- 2026-09-19 00:00 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 | AI5B S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-16 23:39 | 40m | - / - | MI7XHT | -8 / - | 2 | Partial capture |
| 09-16 23:37 | 40m | -12 / -10 | HZ1TT | -7 / -13 | 6 | ✓ Full exchange observed |
| 08-10 02:25 | 80m | - / - | 9A4ZM | +17 / - | 3 | Partial capture |
| 07-27 00:27 | 20m | -8 / - | EP5TJS | - / - | 8 | Partial capture |
| 07-27 00:23 | 20m | -1 / - | EP5TJS | - / - | 3 | Partial capture |
| 07-08 04:03 | 20m | - / - | UR4QFP | -5 / - | 6 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 235530 -13 2256 D2ACE AI5B EM50 233745 -10 2541 HZ1TT AI5B EM50 233800 -11 1729 AI5B HZ1TT -10 (x2) 233845 -13 2541 HZ1TT AI5B R-13 233900 -5 1729 AI5B HZ1TT RR73 233930 -7 2462 AI5B MI7XHT IO64 233930 -4 1729 AI5B HZ1TT 73 234015 -10 2541 KA0BWH AI5B RR73 234100 -8 2461 AI5B MI7XHT IO64 000000 -12 2588 FG5FU AI5B EM50
UTC dB Audio Message 022515 +18 2340 AI5B 9A4ZM JN86 (x3)
UTC dB Audio Message 181830 -17 2404 AI5B IU3TOQ JN55
UTC dB Audio Message 040400 -2 2398 AI5B UR4QFP KN77 (x4) 002315 -2 3003 EP5TJS AI5B EM50 (x11)
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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