OP4W — 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 OP4W, decoded by SO8OO in southeastern Poland. 30 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-20 and 2026-11-04.
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 30 FT8 messages attributed to OP4W as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (90%), followed by 10 m (7%) and 40 m (3%). Several six-hour UTC windows tied for the largest share (93%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.
Overview
Bands
Last attributed message: 2026-11-04 09:19 UTC
Observed FT8 message patterns
- Attributed sample
- 30 messages
- Active dates
- 4 UTC dates
- Estimated median S/N
- -12 dB
- Estimated 10th-90th percentile
- -19 to +3 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 9, moderate (-15 to -9 dB) 11, strong (≥ -8 dB) 10.
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 OP4W in decoded directed-looking exchanges:
Most frequent locator attributed to OP4W
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
- JO10 · 7 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,335 km (approx.)
- Last such locator decoded
- 2026-11-04 09:19 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 | OP4W S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-04 09:19 | 40m | - / - | DK3HV | -19 / - | 3 | Partial capture |
| 11-04 09:19 | 40m | - / - | HA7TM | 0 / - | 3 | Partial capture |
| 08-09 19:13 | 10m | -16 / - | DO1FDK | - / -16 | 2 | Partial capture |
| 08-09 19:11 | 10m | - / -7 | RN6MA | -5 / - | 3 | Partial capture |
| 08-09 18:57 | 10m | - / -6 | RN6MA | -4 / - | 4 | Partial capture |
| 08-09 16:50 | 10m | - / -16 | RN6MA | -8 / - | 3 | Partial capture |
| 08-09 16:34 | 10m | - / - | IK2UCK | -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 091900 -10 1329 CQ OP4W JO10 091915 +0 1329 OP4W HA7TM JN97 091915 -21 1892 OP4W DK3HV JO31 091945 -3 1329 OP4W HA7TM JN97 091945 -19 1891 OP4W DK3HV JO31 092015 +4 1329 OP4W HA7TM JN97 092015 -16 1892 OP4W DK3HV JO31 092045 -5 988 OP4W F1PBZ +02
UTC dB Audio Message 163445 -22 2040 OP4W IK2UCK JN45 (x2) 165045 -8 913 OP4W RN6MA -16 (x10) 191330 -16 913 DO1FDK OP4W -16 (x2)
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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