ON4UP — 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 ON4UP, decoded by SO8OO in southeastern Poland. 151 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-30 and 2026-11-05.
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 151 FT8 messages attributed to ON4UP as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (50%), followed by 80 m (39%) and 20 m (11%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (71%); the estimated median was -3 dB.
Overview
Bands
Last attributed message: 2026-11-05 18:41 UTC
Observed FT8 message patterns
- Attributed sample
- 151 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- -3 dB
- Estimated 10th-90th percentile
- -14 to +7 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 10, moderate (-15 to -9 dB) 34, strong (≥ -8 dB) 107.
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 ON4UP 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 ON4UP
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
- JO20 · 84 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,194 km (approx.)
- Last such locator decoded
- 2026-11-05 18:41 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 | ON4UP S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-05 18:38 | 80m | -12 / -1 | DA6SL | -1 / - | 5 | ✓ Full exchange observed |
| 11-05 18:33 | 80m | -16 / - | DK7TX | - / +4 | 2 | ✓ Closing fragment |
| 11-05 18:23 | 80m | -17 / +2 | DA6NEL | -1 / +4 | 4 | ✓ Full exchange observed |
| 11-05 18:21 | 80m | - / +10 | DO1DMR | +5 / - | 2 | Partial capture |
| 11-05 18:19 | 80m | -9 / - | OH2MA | +10 / +2 | 3 | ✓ Closing observed |
| 11-05 18:18 | 80m | -9 / - | DB2QM | - / -14 | 2 | ✓ Closing fragment |
| 11-05 18:16 | 80m | - / 0 | G8TJQ | -3 / - | 2 | Partial capture |
| 11-05 18:14 | 80m | -4 / - | PA3DJP | - / -15 | 2 | ✓ Closing fragment |
| 11-05 18:12 | 80m | -10 / - | DO5AX | - / -14 | 2 | ✓ Closing fragment |
| 11-05 18:10 | 80m | -5 / -17 | SP5JMA | +13 / -6 | 4 | ✓ Full exchange observed |
| 11-05 18:08 | 80m | -7 / -10 | DF2JK | -15 / 0 | 5 | ✓ Full exchange observed |
| 11-05 18:04 | 80m | -10 / -4 | YO2CR | -4 / 0 | 5 | ✓ Full exchange observed |
| 11-05 18:02 | 80m | -2 / 0 | DL1HTY | -5 / +3 | 5 | ✓ Full exchange observed |
| 11-05 18:00 | 80m | -10 / -10 | G0WZM | -22 / - | 4 | ✓ Closing observed |
| 11-05 17:59 | 80m | -8 / - | ON8WR | -13 / - | 4 | ✓ Full exchange observed |
| 11-05 17:58 | 80m | -5 / -3 | IK1AIL | -10 / - | 5 | ✓ Closing observed |
| 11-04 19:47 | 40m | - / - | DL6NA | -20 / - | 2 | ✓ Closing fragment |
| 11-04 19:37 | 40m | +1 / -6 | YT2U | -4 / - | 4 | ✓ Full exchange observed |
| 11-04 19:36 | 40m | 0 / - | LB3RE | - / +9 | 2 | ✓ Closing fragment |
| 11-04 19:29 | 40m | +4 / - | 9H2LB | - / -6 | 11 | Partial capture |
| 11-04 19:26 | 40m | +6 / - | ZS6KBS | - / - | 6 | Partial capture |
| 11-04 19:25 | 40m | +5 / - | SQ2EEJ | - / -5 | 2 | ✓ Closing fragment |
| 11-04 19:22 | 40m | +2 / - | SP5MIG | - / +7 | 2 | ✓ Closing fragment |
| 11-04 19:20 | 40m | +4 / -15 | SV1DKR | -1 / -15 | 5 | ✓ Full exchange observed |
| 11-04 19:18 | 40m | +2 / - | EB1GUA | - / -9 | 3 | Partial capture |
| 11-04 19:15 | 40m | +1 / - | EA5MK | - / -20 | 5 | Partial capture |
| 11-04 19:11 | 40m | +6 / - | R3XBB | - / +2 | 2 | ✓ Closing fragment |
| 11-04 19:08 | 40m | -2 / - | VJ6X | - / - | 3 | Partial capture |
| 11-04 19:06 | 40m | +6 / - | RA3LAT | - / +3 | 2 | ✓ Closing fragment |
| 11-04 19:05 | 40m | - / - | DG5PW | -6 / - | 5 | Partial capture |
| 10-31 20:05 | 40m | - / +2 | CT7AXN | -6 / - | 2 | ✓ Closing fragment |
| 10-10 10:02 | 40m | - / - | DL1SWB | -12 / - | 2 | Partial capture |
| 08-30 18:47 | 20m | - / - | G8OO | -1 / - | 8 | Partial capture |
| 08-30 18:22 | 20m | -8 / -9 | F1PPH | -15 / -9 | 3 | ✓ Full exchange observed |
| 08-30 18:19 | 20m | +7 / -8 | IQ4JO | -2 / -19 | 4 | ✓ Full exchange observed |
| 08-30 18:18 | 20m | - / - | PD1HPB | -12 / - | 2 | Partial capture |
| 08-30 18:16 | 20m | +1 / - | BG7BVP | - / -16 | 3 | Partial capture |
| 08-30 18:15 | 20m | +10 / - | IK2WSA | - / +3 | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 183330 -15 1903 DK7TX ON4UP RR73 183400 -11 1903 CQ ON4UP JO20 (x4) 183615 +3 2154 ON4UP EA5DF IM99 183845 +0 1903 ON4UP DA6SL JO31 183900 -14 1902 DA6SL ON4UP +20 183915 -1 1903 ON4UP DA6SL R-01 183930 -11 1903 DA6SL ON4UP RR73 183945 -1 1903 ON4UP DA6SL 73 184000 -15 1903 CQ ON4UP JO20 (x4)
UTC dB Audio Message 193730 +0 839 YT2U ON4UP R+16 193745 -3 1274 ON4UP YT2U RR73 193800 +2 839 YT2U ON4UP 73 193830 -3 839 CQ ON4UP JO20 (x9) 194745 -20 2211 ON4UP DL6NA R+12 (x2) 195015 -13 580 ON4UP DK1MBY R-03
UTC dB Audio Message 182200 -8 773 F1PPH ON4UP -09 182215 -13 774 ON4UP F1PPH R-09 (x2) 182745 -10 773 ON4UP PD3LKN JO22 184745 -1 1971 ON4UP G8OO JO02 (x8) 185845 -3 775 CT8ACA ON4UP R-11 190045 +0 775 CQ ON4UP JO20 190200 -11 1564 ON4UP DB1EF JO41
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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