OS5U — 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 OS5U, decoded by SO8OO in southeastern Poland. 78 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 12 UTC dates in the available aggregate history. Observed between 2026-06-23 and 2026-11-01.
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 78 FT8 messages attributed to OS5U as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (67%), followed by 40 m (33%). Most decodes (68%) fell within the six-hour window 08:00-14:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.
Overview
Bands
Last attributed message: 2026-11-01 10:45 UTC
Observed FT8 message patterns
- Attributed sample
- 78 messages
- Active dates
- 12 UTC dates
- Estimated median S/N
- -13 dB
- Estimated 10th-90th percentile
- -18 to -2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 26, moderate (-15 to -9 dB) 32, strong (≥ -8 dB) 20.
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 OS5U 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 OS5U
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 · 44 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,335 km (approx.)
- Last such locator decoded
- 2026-11-01 10:45 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 | OS5U S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-01 10:51 | 40m | - / -17 | ON4MHZ | -17 / - | 3 | ✓ Closing fragment |
| 11-01 10:45 | 40m | - / -13 | SQ3PMX | -11 / - | 3 | ✓ Closing fragment |
| 10-31 08:53 | 40m | - / -12 | SP1EG | -8 / - | 2 | ✓ Closing fragment |
| 10-25 10:24 | 40m | - / - | DL4KSD | -12 / - | 2 | Partial capture |
| 10-25 10:05 | 40m | - / - | IU6PRJ | -16 / - | 2 | Partial capture |
| 10-25 10:00 | 40m | - / - | DL6RS | -4 / - | 3 | Partial capture |
| 10-25 09:56 | 40m | - / -17 | DH2NJS | -12 / - | 10 | Partial capture |
| 10-25 09:52 | 40m | - / -10 | F1PBZ | -18 / - | 2 | Partial capture |
| 10-24 06:47 | 40m | - / -19 | F1PBZ | -8 / - | 3 | Partial capture |
| 10-24 06:24 | 40m | - / -17 | YL3AUR | -9 / - | 3 | ✓ Closing fragment |
| 10-24 06:13 | 40m | - / -14 | OH3OJ | -5 / - | 3 | ✓ Closing fragment |
| 10-16 19:35 | 40m | - / -1 | R4ZZ | -10 / - | 2 | Partial capture |
| 10-16 19:31 | 40m | - / -17 | UN0GY | -10 / - | 2 | ✓ Closing fragment |
| 10-10 16:46 | 40m | - / -9 | F4CWQ | -12 / - | 3 | ✓ Closing fragment |
| 10-10 15:27 | 40m | - / - | US2YW | +5 / - | 3 | Partial capture |
| 10-10 15:21 | 40m | - / - | UX7QV | -1 / - | 2 | Partial capture |
| 10-10 15:20 | 40m | - / - | DL4DW | +3 / - | 3 | ✓ Closing fragment |
| 10-10 15:19 | 40m | - / - | US2YW | +4 / - | 3 | Partial capture |
| 10-10 15:05 | 40m | - / -17 | OE3UKW | +2 / - | 2 | ✓ Closing fragment |
| 10-10 08:44 | 40m | - / - | UX7QV | +2 / - | 5 | Partial capture |
| 10-10 08:42 | 40m | - / -5 | IZ5RKH | -10 / - | 3 | ✓ Closing fragment |
| 10-10 08:42 | 40m | - / - | S51PV | -14 / - | 5 | Partial capture |
| 10-10 08:39 | 40m | - / +2 | DK3HJ | -16 / - | 4 | ✓ Closing fragment |
| 10-10 08:25 | 40m | - / +2 | DF8RU | -2 / - | 3 | ✓ Closing fragment |
| 10-10 08:20 | 40m | - / - | SP6AXW | -22 / - | 2 | Partial capture |
| 10-10 08:20 | 40m | - / - | IU2THY | -8 / - | 2 | Partial capture |
| 10-01 17:12 | 40m | -17 / - | DK8HC | -11 / - | 2 | ✓ Closing observed |
| 10-01 17:10 | 40m | -17 / -10 | SP4MPH | 0 / - | 3 | ✓ Full exchange observed |
| 10-01 17:07 | 40m | -15 / - | I6EDC | -5 / - | 2 | ✓ Closing observed |
| 10-01 17:02 | 40m | - / -2 | DJ2FL | -6 / - | 3 | ✓ Closing fragment |
| 10-01 17:00 | 40m | -13 / - | SM0TPH | -7 / - | 2 | ✓ Closing observed |
| 10-01 16:55 | 40m | -14 / - | ON4ASV | +9 / - | 2 | Partial capture |
| 10-01 16:54 | 40m | -16 / - | DL1YFS | -11 / +7 | 5 | ✓ Full exchange observed |
| 10-01 16:51 | 40m | - / -7 | EA1IOK | -16 / - | 2 | Partial capture |
| 09-27 09:58 | 40m | - / 0 | F6BEC | -17 / - | 3 | ✓ Closing fragment |
| 09-24 15:38 | 40m | - / -4 | I4BUQ | -10 / - | 4 | ✓ Closing fragment |
| 09-23 09:25 | 40m | - / -7 | DH3PL | -19 / - | 3 | ✓ Closing fragment |
| 09-23 09:23 | 40m | - / -21 | DG6TOM | -11 / - | 3 | ✓ Closing fragment |
| 09-23 09:10 | 40m | - / +9 | DF5DY | -8 / - | 2 | ✓ Closing fragment |
| 09-23 09:00 | 40m | - / -3 | DG7CF | -10 / - | 3 | ✓ Closing fragment |
| 09-23 09:00 | 40m | - / -18 | S57CT | -7 / - | 4 | ✓ Closing fragment |
| 09-23 08:57 | 40m | - / +2 | DH1NGL | -19 / - | 2 | ✓ Closing fragment |
| 09-22 14:53 | 40m | - / -8 | PD4HT | -16 / - | 2 | ✓ Closing fragment |
| 09-22 14:47 | 40m | - / -16 | SH5RJX | -13 / - | 3 | ✓ Closing fragment |
| 09-22 14:43 | 40m | - / -5 | IK2TCV | -13 / - | 3 | ✓ Closing fragment |
| 09-22 14:37 | 40m | - / +4 | PH9OY | -22 / - | 2 | ✓ Closing fragment |
| 09-22 14:30 | 40m | - / -12 | IN3ADG | -3 / - | 2 | ✓ Closing fragment |
| 09-22 14:30 | 40m | - / +1 | PD1ADA | -11 / - | 4 | Partial capture |
| 09-22 08:46 | 40m | - / - | DG7CF | -15 / - | 3 | Partial capture |
| 09-22 08:42 | 40m | - / +6 | F4BYA | -11 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 100845 -18 1578 OS5U DL6AZ R-15 102115 -14 1221 OS5U DH2NJS JO50 102415 -12 2488 OS5U DL4KSD JO71 (x2) 085145 -15 1225 OS5U GJ0KYZ IN89 085315 -8 1226 OS5U SP1EG -12 (x2) 104400 -22 1224 EI7JQ OS5U RR73 104500 -15 1224 CQ OS5U JO10 104545 -10 2374 OS5U SQ3PMX JO72 (x3) 105145 -18 1119 OS5U ON4MHZ JN29 (x3)
UTC dB Audio Message 083915 +0 1247 DL6UM OS5U RR73 083930 -7 1084 OS5U EA3IE JN01 083945 -5 1247 EA3IE OS5U -05 084000 -11 1084 OS5U EA3IE R-16 084015 -3 1246 EA3IE OS5U RR73 084030 -11 1085 OS5U EA3IE 73 084045 -9 1246 CQ OS5U JO10 084100 +7 1248 OS5U UA3AIU KO85 084115 -9 1246 UA3AIU OS5U +04 (x2) 084245 +2 1246 CQ OS5U JO10 (x5)
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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