SM4VZN — 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 SM4VZN, decoded by SO8OO in southeastern Poland. 91 FT8 messages attributed to this token as transmitter, on 60m, 40m, across 8 UTC dates in the available aggregate history. Observed between 2026-09-13 and 2026-10-21.
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 91 FT8 messages attributed to SM4VZN as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (67%), followed by 60 m (33%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.
Overview
Bands
Last attributed message: 2026-10-21 19:23 UTC
Observed FT8 message patterns
- Attributed sample
- 91 messages
- Active dates
- 8 UTC dates
- Estimated median S/N
- -9 dB
- Estimated 10th-90th percentile
- -21 to -1 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 29, moderate (-15 to -9 dB) 21, strong (≥ -8 dB) 41.
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 SM4VZN 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 SM4VZN
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 · 63 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,249 km (approx.)
- Last such locator decoded
- 2026-10-21 19:23 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 | SM4VZN S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-21 19:22 | 60m | -20 / - | F1TXI | - / - | 2 | Partial capture |
| 10-21 19:17 | 60m | -15 / - | UX0FF | - / - | 6 | Partial capture |
| 10-21 19:15 | 60m | -13 / -14 | UR8UQ | +12 / -12 | 6 | ✓ Full exchange observed |
| 10-20 18:46 | 40m | - / -4 | G3RCW | -16 / - | 2 | Partial capture |
| 10-19 20:07 | 60m | - / -9 | ON6MX | +3 / - | 3 | ✓ Closing fragment |
| 10-19 19:48 | 60m | - / -17 | OH3GBW | -16 / - | 2 | ✓ Closing fragment |
| 10-19 19:45 | 60m | - / -12 | IK5ZPV | -8 / - | 2 | ✓ Closing fragment |
| 10-19 19:44 | 60m | - / -5 | DH4PAP | -13 / - | 7 | ✓ Closing fragment |
| 10-19 19:32 | 40m | - / - | IU8RFW | -10 / - | 2 | Partial capture |
| 10-19 19:32 | 40m | -9 / - | UK8OM | - / - | 4 | Partial capture |
| 10-19 19:30 | 40m | -12 / - | UN8PC | - / - | 3 | ✓ Closing fragment |
| 10-19 19:26 | 40m | -10 / - | UK8OM | - / - | 2 | Partial capture |
| 10-19 19:23 | 40m | -10 / - | R3LDK | -9 / -5 | 5 | ✓ Full exchange observed |
| 10-17 18:40 | 40m | -7 / -12 | IQ4JO | 0 / -12 | 4 | ✓ Full exchange observed |
| 10-17 18:38 | 40m | -8 / - | G1PZS | -10 / -16 | 4 | ✓ Closing observed |
| 10-17 18:38 | 40m | - / - | OK3MB | -4 / - | 2 | Partial capture |
| 10-17 18:36 | 40m | - / - | UB6HWF | -18 / - | 2 | Partial capture |
| 10-17 18:35 | 40m | -9 / -5 | US8KA | -4 / -10 | 5 | ✓ Full exchange observed |
| 10-17 18:31 | 40m | -6 / - | EX7CQ | - / - | 4 | Partial capture |
| 10-16 17:39 | 60m | -15 / -14 | DL3SAT | +8 / - | 9 | ✓ Closing observed |
| 10-16 17:38 | 60m | - / -12 | G4ZFJ | +6 / - | 5 | ✓ Closing fragment |
| 10-16 17:38 | 60m | - / -13 | YO4BEW | -11 / - | 7 | ✓ Closing fragment |
| 10-16 17:37 | 60m | - / -9 | DK6AH | -20 / - | 10 | ✓ Closing fragment |
| 10-16 17:33 | 40m | - / -7 | PD7YY | -6 / - | 3 | ✓ Closing fragment |
| 10-16 17:29 | 40m | -1 / -7 | DF3GY | +6 / +2 | 5 | ✓ Full exchange observed |
| 10-16 17:29 | 40m | -7 / -9 | UN0GY | -12 / -15 | 5 | ✓ Full exchange observed |
| 10-16 16:55 | 40m | -2 / - | YL3KZ | - / - | 3 | Partial capture |
| 10-16 16:51 | 40m | -2 / - | RM8CZ | -17 / -14 | 3 | ✓ Closing observed |
| 10-16 16:49 | 40m | -2 / - | RA8AF | - / -13 | 3 | ✓ Closing fragment |
| 10-16 16:47 | 40m | +2 / -3 | DL9KM | -8 / -11 | 7 | ✓ Full exchange observed |
| 10-16 16:40 | 40m | 0 / -3 | R2EC | +7 / -12 | 5 | ✓ Full exchange observed |
| 10-13 18:11 | 60m | - / - | SQ9LOJ | -12 / - | 2 | Partial capture |
| 10-13 18:04 | 60m | - / -2 | F9IE | -4 / - | 2 | ✓ Closing fragment |
| 10-13 18:00 | 60m | -21 / -17 | ER3UA | -3 / - | 5 | ✓ Closing observed |
| 10-13 17:51 | 60m | -22 / -19 | EU3A | +10 / - | 5 | ✓ Closing observed |
| 10-13 17:47 | 60m | - / - | SQ9LOJ | -16 / - | 2 | Partial capture |
| 10-13 17:43 | 60m | -21 / - | UT5UGR | - / - | 9 | Partial capture |
| 10-13 17:39 | 60m | -23 / - | UT5UGR | - / - | 3 | Partial capture |
| 10-13 17:03 | 60m | - / -8 | PA4PA | +1 / - | 4 | ✓ Closing fragment |
| 10-13 17:02 | 60m | - / - | OE5DML | -2 / - | 2 | Partial capture |
| 10-13 16:46 | 40m | - / -2 | DJ0MAB | +1 / - | 4 | ✓ Closing fragment |
| 10-13 16:43 | 40m | - / -12 | HB9ELE | +9 / - | 4 | ✓ Closing fragment |
| 10-13 16:43 | 40m | - / - | SA3KAK | -16 / - | 2 | Partial capture |
| 10-13 16:39 | 40m | - / 0 | OS4K | -19 / - | 4 | ✓ Closing fragment |
| 10-10 17:32 | 40m | - / - | DF8MH | -1 / - | 12 | Partial capture |
| 10-10 17:32 | 40m | - / - | IU2THY | +11 / - | 3 | Partial capture |
| 10-10 17:32 | 40m | - / - | PA3WB | +2 / - | 3 | ✓ Closing fragment |
| 09-28 09:01 | 40m | - / -17 | OZ9FF | -11 / - | 5 | ✓ Closing fragment |
| 09-27 19:16 | 40m | -13 / -9 | G5DAN | -10 / - | 4 | ✓ Closing observed |
| 09-13 18:16 | 40m | - / -13 | UC6D | +5 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 200845 +2 2246 SM4VZN ON6MX 73 191500 -14 1029 UR8UQ SM4VZN JP70 (x2) 191545 +10 828 SM4VZN UR8UQ -14 191600 -12 1029 UR8UQ SM4VZN R-12 191615 +15 828 SM4VZN UR8UQ RR73 191630 -15 1029 UR8UQ SM4VZN 73 191700 -16 1029 UX0FF SM4VZN JP70 (x6) 192230 -21 1626 F1TXI SM4VZN JP70 (x2)
UTC dB Audio Message 193045 -8 2189 UN8PC SM4VZN JP70 (x2) 193215 -12 2189 UK8OM SM4VZN JP70 193230 -12 1374 SM4VZN IU8RFW JN70 193245 -8 2189 UK8OM SM4VZN JP70 193300 -8 1374 SM4VZN IU8RFW JN70 193315 -8 2189 UK8OM SM4VZN JP70 (x2) 184600 -17 1833 SM4VZN G3RCW IO93 (x2) 184915 -8 2195 CQ SM4VZN JP70 (x3) 185100 -7 2194 EU4U SM4VZN JP70 185230 -5 2194 OE3KAS SM4VZN JP70
UTC dB Audio Message 131600 -16 2128 SM4VZN CN8NS -17 100715 -19 1934 SM4VZN CN8WK +00
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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