RA3OS — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving RA3OS, decoded by SO8OO in southeastern Poland. 30 FT8 messages attributed to this token as transmitter, on 80m, 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 30 FT8 messages attributed to RA3OS 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 +6 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 30 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- +6 dB
- Estimated 10th-90th percentile
- 0 to +11 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 30.
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 RA3OS in decoded directed-looking exchanges:
Most frequent locator attributed to RA3OS
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
- KO90 · 18 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,223 km (approx.)
- Last such locator decoded
- 2026-09-18 17:37 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 | RA3OS S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-18 17:37 | 80m | +8 / - | ZL2NU | - / - | 2 | Partial capture |
| 09-18 17:16 | 80m | 0 / - | ZL2NU | - / - | 2 | Partial capture |
| 09-18 17:14 | 80m | +2 / - | JA8DNV | - / -24 | 3 | Partial capture |
| 09-18 16:30 | 80m | +10 / - | UB8CQC/P | - / -16 | 2 | ✓ Closing fragment |
| 09-18 16:28 | 80m | +11 / - | YE4FNN | - / -24 | 4 | ✓ Closing fragment |
| 09-18 16:27 | 80m | +8 / - | UN7LAN | - / - | 3 | Partial capture |
| 09-18 16:24 | 80m | +6 / - | R9JX | - / - | 3 | Partial capture |
| 09-18 16:23 | 80m | +2 / - | UA4QK | - / -2 | 2 | ✓ Closing fragment |
| 09-18 16:22 | 80m | +8 / - | R0AL | - / -19 | 2 | ✓ Closing fragment |
| 09-18 16:20 | 80m | 0 / - | R0ADK | - / -15 | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 162930 +13 2294 YE4FNN RA3OS R-24 (x2) 163030 +11 2294 UB8CQC/P RA3OS -16 (x2) 163200 +13 2294 RC7LX RA3OS 73 163530 +10 2294 JA4FKX RA3OS KO90 171415 +2 2295 JA8DNV RA3OS R-24 (x3) 171630 -2 2295 ZL2NU RA3OS KO90 (x6)
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