IZ0HEI — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving IZ0HEI, decoded by SO8OO in southeastern Poland. 10 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 3 UTC dates in the available aggregate history. Observed between 2026-09-10 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 10 FT8 messages attributed to IZ0HEI as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (80%), followed by 80 m (20%). In this small sample, the estimated median decoder S/N was -15 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-09-19 04:52 UTC
Observed FT8 message patterns
- Attributed sample
- 10 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- -15 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 1.
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 IZ0HEI 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 IZ0HEI
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
- JN61 · 6 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,158 km (approx.)
- Last such locator decoded
- 2026-09-19 04:52 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 | IZ0HEI S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-19 04:51 | 80m | -10 / -12 | MI0NWA | -6 / - | 3 | ✓ Closing observed |
| 09-17 04:35 | 40m | -22 / - | MI0NWA | - / -16 | 3 | Partial capture |
| 09-10 05:47 | 40m | - / - | F5RRS | -4 / - | 3 | Partial capture |
| 09-10 05:47 | 40m | - / - | RC2Y | -7 / - | 3 | Partial capture |
| 09-10 05:45 | 40m | - / -8 | DJ0MAB | +5 / - | 4 | ✓ Closing fragment |
| 09-10 05:06 | 40m | - / -7 | YO4NT | +1 / - | 2 | Partial capture |
| 09-10 05:05 | 40m | -6 / -15 | F5MOO | +6 / -1 | 4 | ✓ Full exchange observed |
| 09-10 04:40 | 160m | - / - | PA3DUU | -12 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 045100 -9 714 IZ0HEI MI0NWA -12 (x2) 045145 -10 1621 MI0NWA IZ0HEI 73 045245 -10 1621 DO8JB IZ0HEI JN61
UTC dB Audio Message 054530 +4 1069 IZ0HEI DJ0MAB JN49 (x3) 054700 -8 1571 IZ0HEI RC2Y KO73 054700 +4 1070 IZ0HEI DJ0MAB 73 054730 -11 1571 IZ0HEI RC2Y KO73 054730 -6 2022 IZ0HEI F5RRS JN36 054800 -2 1571 IZ0HEI RC2Y KO73 054800 +1 2022 IZ0HEI F5RRS JN36 (x2) 043515 -23 1729 MI0NWA IZ0HEI JN61 (x3) 043800 -17 1765 IZ0HEI SV8NAJ -12 050545 -24 1729 TJ1GD IZ0HEI JN61
UTC dB Audio Message 042500 -14 2234 IZ0HEI F4FQY -16 044030 -12 844 IZ0HEI PA3DUU RR73 (x2)
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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