JA7YAA — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving JA7YAA, decoded by SO8OO in southeastern Poland. 7 FT8 messages attributed to this token as transmitter, on 40m, across 1 UTC dates in the available aggregate history. Last observed 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 7 FT8 messages attributed to JA7YAA as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -16 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 7 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -16 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 0.
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 JA7YAA in decoded directed-looking exchanges:
Most frequent locator attributed to JA7YAA
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
- QM08 · 2 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,525 km (approx.)
- Last such locator decoded
- 2026-09-18 20:02 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 | JA7YAA S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-18 20:14 | 40m | - / -10 | IZ5IMD | +3 / - | 3 | ✓ Closing fragment |
| 09-18 20:13 | 40m | -20 / - | 9A5E | -19 / -9 | 3 | ✓ Closing observed |
| 09-18 20:05 | 40m | -16 / -9 | R7ZY | +2 / -16 | 6 | ✓ Full exchange observed |
| 09-18 20:01 | 40m | -16 / - | EA5KB | - / - | 2 | Partial capture |
| 09-18 20:01 | 40m | - / - | DL1SVI | -4 / - | 3 | Partial capture |
| 09-18 19:59 | 40m | - / - | RV3V | +5 / - | 2 | Partial capture |
| 09-18 19:56 | 40m | -16 / -12 | SM2OTU | -7 / - | 3 | ✓ Closing observed |
| 09-18 19:48 | 80m | - / -13 | OH4MDY | -2 / - | 2 | ✓ Closing fragment |
| 09-13 20:39 | 40m | - / -16 | YO4NF | -22 / - | 2 | ✓ Closing fragment |
| 09-13 20:36 | 40m | - / - | PD0IFI | +4 / - | 2 | Partial capture |
| 09-13 20:32 | 40m | - / - | DK1GP | 0 / - | 9 | Partial capture |
| 09-13 20:31 | 40m | - / -15 | OZ7CL | +8 / - | 2 | ✓ Closing fragment |
| 09-08 16:50 | 80m | - / -18 | UX5UO | +18 / - | 3 | ✓ Closing fragment |
| 08-31 20:22 | 40m | - / - | DL3MIB | +16 / - | 7 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 200200 -6 1914 JA7YAA DL1SVI JO60 200215 -16 1782 EA5KB JA7YAA QM08 200500 +0 2612 JA7YAA R7ZY KN98 (x2) 200545 -18 1781 R7ZY JA7YAA -16 200600 +2 2612 JA7YAA R7ZY R-09 200615 -15 1781 R7ZY JA7YAA RR73 200630 +4 2612 JA7YAA R7ZY 73 200830 +16 445 JA7YAA PD0IFI JO32 201315 -20 1780 9A5E JA7YAA R-09 201330 -19 2170 JA7YAA 9A5E RR73 201345 -20 1780 9A5E JA7YAA 73 201430 +3 2212 JA7YAA IZ5IMD JN53 (x3)
UTC dB Audio Message 165030 +17 1192 JA7YAA UX5UO KO50 (x3) 194600 -1 1034 JA7YAA OH4MDY RR73 (x3)
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