ON4UP — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving ON4UP, decoded by SO8OO in southeastern Poland. 17 FT8 messages attributed to this token as transmitter, on 20m, across 1 UTC dates in the available aggregate history. Last observed 2026-08-30.
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 17 FT8 messages attributed to ON4UP as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was +4 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 17 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- +4 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 15.
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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with ON4UP in decoded directed-looking exchanges:
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 · 8 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,194 km (approx.)
- Last such locator decoded
- 2026-08-30 19:00 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 |
|---|---|---|---|---|---|---|
| 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 |
| 07-17 20:07 | 10m | - / +9 | IK4LZH | -6 / - | 2 | Partial capture |
| 07-17 20:04 | 10m | - / -11 | LZ4VR | -20 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
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
UTC dB Audio Message 200415 -22 1646 ON4UP LZ4VR R-11 (x2) 200715 -7 439 ON4UP IK4LZH JN54 (x2)
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