SM4YZV — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving SM4YZV, decoded by SO8OO in southeastern Poland. 18 FT8 messages attributed to this token as transmitter, on 80m, across 1 UTC dates in the available aggregate history. Last observed 2026-09-17.
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 18 FT8 messages attributed to SM4YZV as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%). In this small sample, the estimated median decoder S/N was -20 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 18 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -20 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 13, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 2.
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 SM4YZV in decoded directed-looking exchanges:
Most frequent locator attributed to SM4YZV
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 · 11 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,249 km (approx.)
- Last such locator decoded
- 2026-09-17 22:48 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 | SM4YZV S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-20 13:27 | 40m | - / -6 | OK1STK | -7 / - | 7 | Partial capture |
| 09-18 23:09 | 80m | - / -7 | OH3GBW | +1 / - | 3 | ✓ Closing fragment |
| 09-17 22:45 | 80m | - / - | DL6RS | +3 / - | 4 | Partial capture |
| 09-17 22:45 | 80m | -21 / -17 | OH2FQV | -4 / - | 4 | ✓ Closing observed |
| 09-17 22:42 | 80m | - / - | DK2MAX | +10 / - | 3 | Partial capture |
| 09-17 22:39 | 80m | -20 / -14 | DO5HOK | 0 / - | 3 | ✓ Closing observed |
| 09-17 22:34 | 80m | -8 / -8 | F5MYK | -11 / -13 | 5 | ✓ Full exchange observed |
| 09-17 22:34 | 80m | -15 / -18 | ON4MAP | -17 / -17 | 9 | ✓ Full exchange observed |
| 09-17 22:18 | 40m | - / -15 | F1PBZ | +5 / - | 6 | ✓ Closing fragment |
| 07-21 19:23 | 40m | - / -13 | OK1FED | -7 / - | 3 | Partial capture |
| 07-21 19:11 | 40m | - / -6 | UA4FKT | -6 / - | 2 | Partial capture |
| 07-21 09:41 | 20m | - / - | RZ4FWA | -15 / - | 4 | Partial capture |
| 07-21 09:27 | 20m | - / -11 | K2UPD | -15 / - | 3 | Partial capture |
| 07-21 09:26 | 20m | - / -15 | DL6KA | -10 / - | 2 | ✓ Closing fragment |
| 07-21 09:08 | 20m | - / -22 | DL1BGH | -15 / - | 3 | Partial capture |
| 06-27 10:09 | 10m | - / - | PD0LK | -14 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 192445 -6 2099 SM4YZV OK1FED R-13 221815 +9 2696 SM4YZV F1PBZ -15 (x6) 225245 -17 2435 SM4YZV SP5EXA KO02 132715 -5 2029 SM4YZV OK1STK JO60 (x7)
UTC dB Audio Message 224530 -21 1730 CQ SM4YZV JP70 224545 -3 1730 SM4YZV OH2FQV KP20 224545 +10 2803 SM4YZV DL6RS JN48 224615 -3 1730 SM4YZV OH2FQV R-17 224615 +4 2803 SM4YZV DL6RS JN48 224630 -21 1730 OH2FQV SM4YZV RRR 224645 -6 1729 SM4YZV OH2FQV 73 224645 +0 2803 SM4YZV DL6RS JN48 224700 -20 1729 CQ SM4YZV JP70 224715 -3 2803 SM4YZV DL6RS JN48 224730 -23 1729 CQ SM4YZV JP70 (x2) 230915 +1 337 SM4YZV OH3GBW KP21 (x3)
UTC dB Audio Message 090845 -14 2301 SM4YZV DL1BGH JO32 (x3) 092615 -10 913 SM4YZV DL6KA -15 (x2) 092745 -13 2476 SM4YZV K2UPD FN65 (x3) 093645 -12 366 SM4YZV PD0WC R-22 094115 -14 2066 SM4YZV RZ4FWA LO23 (x4) 105015 -10 567 SM4YZV IU2THY R+09
UTC dB Audio Message 100915 -14 1351 SM4YZV PD0LK JO21 (x3) 102715 -14 2593 SM4YZV PD0HLA -12
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