SM4JDW — 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 SM4JDW, decoded by SO8OO in southeastern Poland. 13 FT8 messages attributed to this token as transmitter, on 40m, across 1 UTC dates in the available aggregate history. Last observed 2026-10-16.
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 13 FT8 messages attributed to SM4JDW as the transmitting token by decoded message structure across 1 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 -17 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 13 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -17 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 9, moderate (-15 to -9 dB) 4, strong (≥ -8 dB) 0.
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 SM4JDW in decoded directed-looking exchanges:
Most frequent locator attributed to SM4JDW
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
- JP70 · 5 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,249 km (approx.)
- Last such locator decoded
- 2026-10-16 19:25 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 | SM4JDW S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-18 12:02 | 40m | - / -17 | UA4FKT | -17 / - | 2 | Partial capture |
| 10-18 11:59 | 40m | - / 0 | YL2CI | -6 / - | 3 | ✓ Closing fragment |
| 10-16 19:25 | 40m | -16 / - | OE3MZC | - / -3 | 3 | ✓ Closing fragment |
| 10-16 19:24 | 40m | -18 / - | PC1K | - / - | 2 | Partial capture |
| 10-16 19:20 | 40m | -14 / - | DJ0MAB | -10 / +1 | 3 | Partial capture |
| 10-16 19:20 | 40m | -12 / -7 | DK7ZT | -1 / -17 | 6 | Partial capture |
| 10-16 19:19 | 40m | -17 / - | UN0GY | -10 / -16 | 3 | ✓ Closing observed |
| 10-16 19:16 | 40m | - / -11 | UR3HC | -1 / - | 2 | ✓ Closing fragment |
| 10-16 19:12 | 40m | -23 / - | EY7BM | - / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 192230 -14 1657 DK7ZT SM4JDW R-17 (x2) 192415 -17 1657 PC1K SM4JDW JP70 (x2) 192545 -17 1742 OE3MZC SM4JDW JP70 (x3) 192815 -16 1742 DK7ZT SM4JDW 73 115915 -4 1986 SM4JDW YL2CI KO06 115915 -16 1847 SM4JDW UA4FKT LO23 115945 -6 1986 SM4JDW YL2CI R+00 (x2) 120245 -17 1847 SM4JDW UA4FKT LO23 (x2) 120645 -7 802 SM4JDW DH9DR JO31
CW
No CW receptions recorded for this callsign in the last 30 days.
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