SP4WRF — 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 SP4WRF, decoded by SO8OO in southeastern Poland. 524 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, across 25 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-10-22.
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 524 FT8 messages attributed to SP4WRF as the transmitting token by decoded message structure across 25 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (72%), followed by 80 m (15%) and 60 m (6%). Most decodes (88%) fell within the six-hour window 19:00-01:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (92%); the estimated median was +5.5 dB.
Overview
Bands
Last attributed message: 2026-10-22 01:44 UTC
Observed FT8 message patterns
- Attributed sample
- 524 messages
- Active dates
- 25 UTC dates
- Estimated median S/N
- +5.5 dB
- Estimated 10th-90th percentile
- -8 to +15 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 12, moderate (-15 to -9 dB) 30, strong (≥ -8 dB) 482.
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 SP4WRF 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 SP4WRF
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
- JO93 · 428 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 440 km (approx.)
- Last such locator decoded
- 2026-10-22 01:38 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 | SP4WRF S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-22 23:11 | 60m | - / -1 | EP2AES | -9 / - | 3 | ✓ Closing fragment |
| 10-22 01:40 | 80m | - / - | DK8HC | +8 / - | 5 | Partial capture |
| 10-22 01:40 | 80m | - / - | PC2F | -2 / - | 13 | Partial capture |
| 10-22 01:37 | 80m | +24 / - | K6VHF/HR9 | - / -15 | 9 | ✓ Closing fragment |
| 10-22 00:20 | 160m | +2 / - | 7P8GE | - / - | 4 | Partial capture |
| 10-21 23:03 | 160m | +8 / - | 7P8GE | - / -15 | 27 | Partial capture |
| 10-21 22:21 | 160m | +7 / - | 7P8GE | - / -20 | 70 | Partial capture |
| 10-21 21:55 | 160m | +8 / - | 7P8GE | - / -18 | 44 | Partial capture |
| 10-21 21:41 | 160m | +5 / - | 7P8GE | - / - | 8 | Partial capture |
| 10-21 21:20 | 160m | +2 / - | 7P8GE | - / - | 33 | Partial capture |
| 10-21 21:00 | 160m | +6 / - | 7P8GE | - / - | 27 | Partial capture |
| 10-21 20:47 | 160m | +2 / - | 7P8GE | - / - | 13 | Partial capture |
| 10-20 22:18 | 60m | +4 / -16 | JY4CI | -20 / - | 2 | Partial capture |
| 10-20 22:13 | 60m | +4 / - | JY4CI | - / - | 5 | Partial capture |
| 10-20 22:09 | 60m | +4 / - | JY4CI | - / - | 2 | Partial capture |
| 10-15 17:36 | 160m | -4 / - | H49A | - / - | 13 | Partial capture |
| 10-15 17:26 | 160m | -7 / - | H49A | - / - | 12 | Partial capture |
| 10-15 16:12 | 160m | -9 / - | H49A | - / - | 8 | Partial capture |
| 10-13 21:37 | 160m | - / - | 9A4ZM | +12 / - | 2 | Partial capture |
| 10-13 21:32 | 160m | +14 / +1 | 4J3DJ | -4 / -3 | 11 | ✓ Full exchange observed |
| 10-11 19:54 | 60m | +6 / - | H49A | - / - | 5 | Partial capture |
| 10-11 19:44 | 60m | -6 / - | H49A | - / - | 6 | Partial capture |
| 10-10 21:15 | 80m | +6 / - | S79VU | - / -14 | 11 | ✓ Closing fragment |
| 10-10 20:05 | 60m | - / - | F1HFP | +3 / - | 5 | Partial capture |
| 10-10 20:03 | 60m | - / -16 | G0JEI | -8 / - | 2 | Partial capture |
| 10-10 19:58 | 60m | -3 / - | A92AE | - / - | 3 | ✓ Closing fragment |
| 10-10 19:55 | 60m | - / -15 | F5RRS | +9 / - | 3 | ✓ Closing fragment |
| 10-10 19:55 | 60m | - / - | G0AZH | -4 / - | 6 | Partial capture |
| 10-06 22:44 | 160m | -6 / - | 9T0MD | - / - | 2 | Partial capture |
| 10-06 01:13 | 160m | 0 / - | 9T0MD | - / - | 2 | Partial capture |
| 10-05 23:05 | 160m | -12 / - | 9T0MD | - / -19 | 27 | Partial capture |
| 10-05 21:31 | 160m | +6 / - | VK6IR | - / -19 | 3 | ✓ Closing fragment |
| 09-20 16:33 | 160m | -1 / - | YE7LOW | - / - | 3 | Partial capture |
| 09-19 20:12 | 160m | 0 / - | EX7CQ | - / -2 | 5 | Partial capture |
| 09-19 20:07 | 160m | - / - | 9A4ZM | 0 / - | 2 | Partial capture |
| 09-19 20:00 | 160m | +5 / -21 | EX7CQ | -12 / -13 | 17 | ✓ Full exchange observed |
| 09-15 17:47 | 80m | +13 / - | ZS6BUN | - / -22 | 3 | ✓ Closing fragment |
| 09-06 19:12 | 40m | +8 / -2 | DL9KM | 0 / - | 10 | ✓ Full exchange observed |
| 09-06 19:12 | 40m | +11 / -2 | F5MXH | +2 / -5 | 6 | Partial capture |
| 09-06 19:12 | 40m | - / -7 | IU2HUQ | -4 / - | 2 | Partial capture |
| 09-06 00:26 | 80m | - / - | UA4FKT | +20 / - | 4 | Partial capture |
| 09-06 00:22 | 80m | +16 / - | VP8A | - / -9 | 8 | ✓ Closing fragment |
| 09-06 00:04 | 80m | +22 / - | VP8A | - / - | 6 | Partial capture |
| 09-03 22:16 | 60m | +16 / - | D44TWO | - / -12 | 8 | ✓ Closing fragment |
| 09-03 22:09 | 40m | - / -9 | F1PBZ | -3 / - | 2 | ✓ Closing fragment |
| 09-03 22:06 | 40m | - / -4 | F6BHK | -15 / - | 3 | ✓ Closing fragment |
| 09-03 22:03 | 40m | - / -11 | UA9CR | +3 / - | 3 | ✓ Closing fragment |
| 09-03 22:03 | 40m | - / - | DJ0MAB | 0 / - | 4 | Partial capture |
| 08-29 22:46 | 160m | +11 / - | RI1FJL | - / -18 | 5 | Partial capture |
| 08-29 22:18 | 160m | +7 / - | RI1FJL | - / -21 | 44 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 195615 +6 1270 H49A SP4WRF JO93 (x2) 220930 +3 2496 JY4CI SP4WRF JO93 (x8) 221845 -20 1492 SP4WRF JY4CI -16 223300 -9 1489 JY4CI SP4WRF JO93 231100 -7 2359 SP4WRF EP2AES -01 (x3)
UTC dB Audio Message 014200 +7 564 SP4WRF DK8HC JO42 014215 +26 687 K6VHF/HR9 SP4WRF R-19 014230 -2 1700 SP4WRF PC2F JO22 014230 +6 565 SP4WRF DK8HC JO42 014245 +23 687 K6VHF/HR9 SP4WRF R-19 014300 +3 1699 SP4WRF PC2F JO22 014315 +23 687 K6VHF/HR9 SP4WRF R-19 014330 -3 1699 SP4WRF PC2F JO22 014415 +24 337 F5OYA/P SP4WRF RR73 014430 -2 1700 SP4WRF PC2F JO22 (x6)
UTC dB Audio Message 231345 +11 485 7P8GE SP4WRF JO93 (x15)
UTC dB Audio Message 191315 -2 1564 SP4WRF IU2HUQ -07 191315 +1 2542 SP4WRF F5MXH JN07 191315 +2 1842 SP4WRF DL9KM JN68 191330 +11 2542 F5MXH SP4WRF -05 191345 +2 2541 SP4WRF F5MXH R-02 191345 +0 1842 SP4WRF DL9KM JN68 191400 +6 2542 DL9KM SP4WRF +12 191415 +2 2542 SP4WRF F5MXH R-02 191415 -4 1842 SP4WRF DL9KM R-02 191445 -1 2541 SP4WRF F5MXH R-02 191445 +6 1842 SP4WRF DL9KM R-02 191500 +8 2542 DL9KM SP4WRF +12 191515 +1 1842 SP4WRF DL9KM R-02 191530 +11 2542 DL9KM SP4WRF RR73 191545 +0 1842 SP4WRF DL9KM 73
UTC dB Audio Message 100545 -11 617 SP4WRF GJ0KYZ +00 100615 -13 593 SP4WRF CR7BRV IM58 121930 +0 2756 SP4WRF IK2ZJR JN45 125630 -24 1578 SP4WRF PD4FL JO33 (x4) 125845 +4 2641 AA0HJ SP4WRF -08 125900 -19 1578 SP4WRF PD4FL JO33 (x2) 205945 -10 2631 SP4WRF CT2KCK IM59 (x2) 205945 -16 324 SP4WRF RA6OY KN88 (x2) 210615 +0 2686 SP4WRF EA1FRP IN81
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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