JA1OSJ — 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 JA1OSJ, decoded by SO8OO in southeastern Poland. 10 FT8 messages attributed to this token as transmitter, on 20m, across 1 UTC dates in the available aggregate history. Last observed 2026-06-07.
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 10 FT8 messages attributed to JA1OSJ 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 -11 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 10 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -11 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) 5, strong (≥ -8 dB) 5.
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 JA1OSJ in decoded directed-looking exchanges:
Most frequent locator attributed to JA1OSJ
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
- QM06 · 9 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,707 km (approx.)
- Last such locator decoded
- 2026-06-07 15:11 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 | JA1OSJ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-28 13:41 | 20m | - / -20 | UA6ADU | -5 / - | 4 | Partial capture |
| 08-28 13:34 | 20m | - / -11 | RV6AVU | +6 / - | 4 | ✓ Closing fragment |
| 08-06 12:50 | 20m | - / -24 | UT5ZC | -16 / - | 2 | Partial capture |
| 08-04 18:46 | 20m | - / -21 | RW6HB | -9 / - | 2 | ✓ Closing fragment |
| 08-04 08:31 | 20m | - / -20 | DL5NDD | -13 / - | 5 | ✓ Closing fragment |
| 08-04 07:51 | 20m | - / -17 | <...> | -2 / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 083230 -13 1392 JA1OSJ DL5NDD RR73 (x2) 184600 -5 1040 JA1OSJ RW6HB R-21 (x2) 125045 -15 1851 JA1OSJ UT5ZC KN57 (x2) 133445 +8 477 JA1OSJ RV6AVU KN94 (x4) 134145 -4 2139 JA1OSJ UA6ADU -20 (x5)
CW
No CW receptions recorded for this callsign in the last 30 days.
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