IU1VFY — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving IU1VFY, decoded by SO8OO in southeastern Poland. 17 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-08-28 and 2026-08-31.
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 17 FT8 messages attributed to IU1VFY 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 (59%), followed by 40 m (41%). In this small sample, the estimated median decoder S/N was -4 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-08-31 10:06 UTC
Observed FT8 message patterns
- Attributed sample
- 17 messages
- Active dates
- 4 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) 2, moderate (-15 to -9 dB) 4, strong (≥ -8 dB) 11.
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 IU1VFY in decoded directed-looking exchanges:
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 IU1VFY
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
- JN34 · 11 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,267 km (approx.)
- Last such locator decoded
- 2026-08-31 10:06 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 | IU1VFY S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-04 09:31 | 40m | - / -1 | DK7ZT | -18 / - | 2 | Partial capture |
| 08-31 10:05 | 20m | +1 / -16 | 9A4AA | -4 / - | 8 | Partial capture |
| 08-31 10:04 | 20m | -2 / - | OM7AMA | - / - | 2 | Partial capture |
| 08-31 10:01 | 20m | - / -11 | HA1BF | -22 / - | 2 | ✓ Closing fragment |
| 08-30 07:25 | 20m | - / - | 9A4ZM | +4 / - | 3 | Partial capture |
| 08-29 21:42 | 40m | -4 / -4 | EC5M | -4 / -19 | 12 | ✓ Full exchange observed |
| 08-29 21:33 | 20m | - / -10 | EA8UP | -4 / - | 7 | Partial capture |
| 08-29 21:30 | 20m | - / -21 | EA5OL | -9 / - | 3 | ✓ Closing fragment |
| 08-29 07:44 | 20m | - / - | R7OV | 0 / - | 3 | Partial capture |
| 08-29 07:22 | 20m | -12 / -7 | LZ1FBI | -4 / - | 2 | Partial capture |
| 08-28 21:59 | 20m | -15 / -5 | 4Z5PT | 0 / - | 3 | ✓ Closing observed |
| 08-28 21:46 | 20m | - / +10 | Z62NS | +7 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 214230 +0 696 EC5M IU1VFY JN34 214245 -7 697 IU1VFY EC5M -04 214300 -4 696 EC5M IU1VFY JN34 214315 -3 696 IU1VFY EC5M -04 214330 +1 696 EC5M IU1VFY R-19 214345 -1 696 IU1VFY EC5M RR73 214400 -4 697 EC5M IU1VFY R-19 214415 -3 696 IU1VFY EC5M RR73 214430 -10 696 EC5M IU1VFY R-19 214445 -5 697 IU1VFY EC5M RR73 214500 -10 697 EC5M IU1VFY R-19 (x2) 093100 -19 1907 IU1VFY DK7ZT -01 (x2)
UTC dB Audio Message 072645 +5 2468 IU1VFY 9A4ZM JN86 075445 -20 780 <...> IU1VFY JN34 095945 -8 906 MI0NWA IU1VFY JN34 100130 -23 1344 IU1VFY HA1BF -11 (x2) 100430 -4 1194 OM7AMA IU1VFY JN34 (x2) 100530 -3 726 9A4AA IU1VFY JN34 100545 -7 726 IU1VFY 9A4AA -16 100600 -1 726 9A4AA IU1VFY JN34 100615 -6 726 IU1VFY 9A4AA -16 100630 +7 726 9A4AA IU1VFY JN34 100645 +2 726 IU1VFY 9A4AA -16 (x3)
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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