PI4U — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving PI4U, decoded by SO8OO in southeastern Poland. 16 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-26 and 2026-09-18.
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 16 FT8 messages attributed to PI4U as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (50%), followed by 80 m (38%) and 40 m (13%). In this small sample, the estimated median decoder S/N was 0 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-09-18 01:49 UTC
Observed FT8 message patterns
- Attributed sample
- 16 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- 0 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) 0, strong (≥ -8 dB) 16.
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 PI4U in decoded directed-looking exchanges:
Most frequent locator attributed to PI4U
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
- JO21 · 3 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,192 km (approx.)
- Last such locator decoded
- 2026-08-27 02:10 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 | PI4U S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-18 01:47 | 80m | -1 / - | DO8JB | - / -3 | 4 | Partial capture |
| 09-18 01:46 | 80m | - / - | G8OO | -12 / - | 9 | Partial capture |
| 09-18 01:45 | 80m | - / -12 | F1IQH | -24 / - | 3 | ✓ Closing fragment |
| 09-18 01:44 | 80m | +3 / 0 | DL3MIB | +15 / - | 4 | ✓ Full exchange observed |
| 09-18 01:44 | 80m | +6 / 0 | ON3MOH | -12 / - | 5 | ✓ Closing observed |
| 09-18 01:37 | 40m | - / +1 | IZ8PPI | -18 / - | 2 | Partial capture |
| 09-18 01:37 | 40m | - / -6 | TA4SSK | -8 / - | 4 | Partial capture |
| 09-17 20:20 | 40m | - / +1 | F6BHK | -1 / - | 3 | ✓ Closing fragment |
| 08-29 12:30 | 40m | - / - | DL6EL | -3 / - | 5 | ✓ Closing fragment |
| 08-27 02:13 | 40m | -3 / -17 | <...> | -14 / -17 | 4 | Partial capture |
| 08-27 02:06 | 20m | 0 / -5 | W3YNI | 0 / +1 | 5 | Partial capture |
| 08-27 02:06 | 20m | +5 / - | WZ4LZ | - / -6 | 3 | Partial capture |
| 08-26 20:32 | 20m | - / - | OE8RPK | -11 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 014615 -14 1963 PI4U G8OO JO02 (x2) 014645 -24 204 PI4U F1IQH R-12 014715 -7 1962 PI4U G8OO JO02 014715 -24 204 PI4U F1IQH 73 014730 +2 615 DO8JB PI4U -03 014745 -11 1963 PI4U G8OO JO02 014800 -1 615 DO8JB PI4U -03 014815 -18 1963 PI4U G8OO JO02 014830 -6 615 DO8JB PI4U -03 014845 -7 1963 PI4U G8OO JO02 (x2) 014930 +0 614 DO8JB PI4U -03 014945 -15 1962 PI4U G8OO JO02 (x2)
UTC dB Audio Message 021415 -2 649 <...> PI4U R-17 123045 -5 1229 PI4U DL6EL JN57 (x5) 202015 -1 650 PI4U F6BHK JN24 (x3) 013715 -7 652 PI4U TA4SSK KM57 (x2) 013745 -24 1531 PI4U IZ8PPI +01 (x2) 013915 -3 974 PI4U TA4SSK R-06 (x2)
UTC dB Audio Message 203100 -4 687 JA0LFV PI4U R-08 203245 -12 1916 PI4U OE8RPK JN76 (x2) 203330 -1 687 CQ DX PI4U JO21 203345 -13 1915 PI4U OE8RPK JN76 020545 +5 687 CQ PI4U JO21 020615 +6 687 WZ4LZ PI4U -06 020630 +0 395 PI4U W3YNI FN00 020645 +3 687 WZ4LZ PI4U -06 020700 +1 394 PI4U W3YNI FN00 020715 +5 687 WZ4LZ PI4U -06 020730 -1 395 PI4U W3YNI FN00 020815 +0 687 W3YNI PI4U +01 020830 -1 395 PI4U W3YNI R-05 021000 -3 687 YV6BXN PI4U JO21
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.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee