IU2STM — reception at SO8OO
Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.
FT8 activity
Receiver-side FT8 activity involving IU2STM, decoded by SO8OO in southeastern Poland. 17 FT8 messages attributed to this token as transmitter, on 40m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-11.
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 IU2STM as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -10 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 17 messages
- Active dates
- 7 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) 5, moderate (-15 to -9 dB) 4, strong (≥ -8 dB) 8.
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 IU2STM 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 IU2STM
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
- JN46 · 12 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,020 km (approx.)
- Last such locator decoded
- 2026-10-11 06:16 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 | IU2STM S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-11 06:16 | 40m | -8 / - | EI9KF | - / -23 | 2 | Partial capture |
| 10-06 18:50 | 40m | -4 / - | V51WH | - / - | 3 | Partial capture |
| 10-06 18:38 | 40m | -16 / +2 | EA3FHP | -11 / - | 4 | ✓ Closing observed |
| 10-06 18:37 | 40m | -20 / - | EX7CQ | - / -14 | 2 | ✓ Closing fragment |
| 09-12 06:17 | 40m | - / - | DK5EO | -16 / - | 3 | Partial capture |
| 09-12 06:15 | 40m | - / -14 | F5PBG | -9 / - | 4 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 061815 -15 1171 IU2STM DK5EO JO31 (x2) 070900 -15 2021 TF5B IU2STM JN46 054915 -13 1152 J88IH IU2STM JN46 183745 -18 1301 EX7CQ IU2STM R-14 (x2) 183830 -11 240 IU2STM EA3FHP JN11 (x2) 183915 -16 241 EA3FHP IU2STM RR73 183930 -10 240 IU2STM EA3FHP 73 185015 -3 2732 V51WH IU2STM JN46 (x3) 061615 -10 1091 EI9KF IU2STM JN46 (x2)
UTC dB Audio Message 112800 -16 2533 IU2STM 5Z4VJ RR73
UTC dB Audio Message 182715 -13 1389 IU2STM CT1END/P +07
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.
CW
No CW receptions recorded for this callsign in the last 30 days.
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