IU5RDF — 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 IU5RDF, decoded by SO8OO in southeastern Poland. 66 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-07-07 and 2026-11-05.
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 66 FT8 messages attributed to IU5RDF as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (83%), followed by 40 m (17%). Several six-hour UTC windows tied for the largest share (65%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.
Overview
Bands
Last attributed message: 2026-11-05 15:55 UTC
Observed FT8 message patterns
- Attributed sample
- 66 messages
- Active dates
- 7 UTC dates
- Estimated median S/N
- -14 dB
- Estimated 10th-90th percentile
- -18 to -4 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 22, moderate (-15 to -9 dB) 35, strong (≥ -8 dB) 9.
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.
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with IU5RDF in decoded directed-looking exchanges:
Most frequent locator attributed to IU5RDF
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
- JN44 · 41 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,137 km (approx.)
- Last such locator decoded
- 2026-11-05 15:55 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 | IU5RDF S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-05 15:55 | 40m | - / - | HB9ZHK | -16 / - | 2 | Partial capture |
| 11-05 15:14 | 40m | -15 / - | JR1CEP | - / - | 4 | Partial capture |
| 11-05 14:46 | 40m | -13 / -11 | UX7QV | +3 / -1 | 4 | ✓ Full exchange observed |
| 11-05 11:02 | 40m | - / -5 | HA1BF | -7 / - | 4 | ✓ Closing fragment |
| 10-31 08:50 | 10m | - / +1 | JY5IB | -18 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 144615 -13 1003 UX7QV IU5RDF JN44 144630 +3 966 IU5RDF UX7QV -11 144645 -16 1003 UX7QV IU5RDF R-01 (x2) 150730 -13 1002 JR1CEP IU5RDF JN44 (x5) 155415 -14 1002 CQ IU5RDF JN44 (x2) 155500 -16 1799 IU5RDF HB9ZHK JN47 155515 -11 1002 CQ IU5RDF JN44 155530 -16 1799 IU5RDF HB9ZHK JN47 155630 -6 1002 IU5RDF YL3ATJ KO27
UTC dB Audio Message 085015 -21 1671 IU5RDF JY5IB +01 (x2)
CW
No CW receptions recorded for this callsign in the last 30 days.
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