SP4JAN — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving SP4JAN, decoded by SO8OO in southeastern Poland. 19 FT8 messages attributed to this token as transmitter, on 80m, across 1 UTC dates in the available aggregate history. Last observed 2026-06-25.
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 19 FT8 messages attributed to SP4JAN as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%). In this small sample, the estimated median decoder S/N was +12 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 19 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- +12 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) 19.
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 SP4JAN in decoded directed-looking exchanges:
Most frequent locator attributed to SP4JAN
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
- KO13 · 11 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 405 km (approx.)
- Last such locator decoded
- 2026-06-25 18:36 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 | SP4JAN S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 06-25 18:37 | 80m | +13 / -25 | R3XBS | -12 / -7 | 6 | ✓ Full exchange observed |
| 06-25 18:36 | 80m | +15 / - | SQ5SCZ | +18 / -7 | 4 | ✓ Closing observed |
| 06-25 18:28 | 80m | +14 / - | R9SAP | - / - | 3 | Partial capture |
| 06-25 18:27 | 80m | +6 / - | RA3RPW | - / - | 2 | Partial capture |
| 06-25 18:24 | 80m | +14 / +3 | SP4FEU | +13 / +3 | 6 | ✓ Full exchange observed |
| 06-25 18:23 | 40m | - / -7 | DK7ZT | -20 / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 182715 +7 1562 RA3RPW SP4JAN KO13 (x2) 182830 +12 1049 R9SAP SP4JAN KO13 (x3) 183615 +9 502 SQ5SCZ SP4JAN KO13 (x2) 183700 +18 502 SP4JAN SQ5SCZ RR73 183715 +17 502 SQ5SCZ SP4JAN 73 183730 -11 2298 SP4JAN R3XBS KO74 183745 +16 502 R3XBS SP4JAN -07 183800 -11 2298 SP4JAN R3XBS R-25 183815 +11 2299 R3XBS SP4JAN RRR 183830 -13 2298 SP4JAN R3XBS 73 183845 +12 2299 R3XBS SP4JAN 73
UTC dB Audio Message 182130 +1 2732 SP4JAN IQ4JO JN63 182300 -22 1904 SP4JAN DK7ZT -07 (x2)
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