RL4D — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving RL4D, decoded by SO8OO in southeastern Poland. 5 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-08-19 and 2026-09-10.
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 5 FT8 messages attributed to RL4D as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (60%), followed by 40 m (40%). In this small sample, the estimated median decoder S/N was -11 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-09-10 19:14 UTC
Observed FT8 message patterns
- Attributed sample
- 5 messages
- Active dates
- 2 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) 2, moderate (-15 to -9 dB) 3, 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 RL4D in decoded directed-looking exchanges:
Most frequent locator attributed to RL4D
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
- LO31 · 3 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,774 km (approx.)
- Last such locator decoded
- 2026-09-10 19:13 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 | RL4D S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-10 19:13 | 80m | - / - | HA7XL | +15 / - | 6 | Partial capture |
| 09-10 19:13 | 80m | -11 / -6 | RV3GZ | -20 / -6 | 5 | ✓ Full exchange observed |
| 08-25 02:55 | 20m | - / -20 | XQ1KK | +2 / - | 2 | ✓ Closing fragment |
| 08-19 02:07 | 40m | -20 / - | OJ0YL | - / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 191330 -10 1001 CQ RL4D LO31 191345 -20 1406 RL4D RV3GZ KO92 191345 +14 1000 RL4D HA7XL JN97 191400 -11 1001 RV3GZ RL4D -06 191415 -21 1406 RL4D RV3GZ R-06 191415 +15 1001 RL4D HA7XL JN97 191430 -11 1001 RV3GZ RL4D RR73 191445 -20 1406 RL4D RV3GZ 73 191445 +17 1000 RL4D HA7XL JN97 (x4)
UTC dB Audio Message 025500 +3 983 RL4D XQ1KK -20 (x2) 025630 -19 1373 RL4D W3YNI -08
UTC dB Audio Message 020745 -20 2155 OJ0YL RL4D LO31 (x2)
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.
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