DF4RD — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving DF4RD, decoded by SO8OO in southeastern Poland. 39 FT8 messages attributed to this token as transmitter, on 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-07-13 and 2026-07-23.
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 39 FT8 messages attributed to DF4RD as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (85%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.
Overview
Observed FT8 message patterns
- Attributed sample
- 39 messages
- Active dates
- 4 UTC dates
- Estimated median S/N
- -11 dB
- Estimated 10th-90th percentile
- -14 to +7 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 22, strong (≥ -8 dB) 15.
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.
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with DF4RD in decoded directed-looking exchanges:
Most frequent locator attributed to DF4RD
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
- JN59 · 33 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 777 km (approx.)
- Last such locator decoded
- 2026-07-23 09:47 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 | DF4RD S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-28 16:07 | 20m | - / -20 | US3EW | -13 / - | 3 | ✓ Closing fragment |
| 08-28 16:06 | 20m | - / - | 3V8HP | -2 / - | 2 | ✓ Closing fragment |
| 07-23 09:46 | 20m | +8 / - | TK5K | -13 / -15 | 5 | ✓ Closing observed |
| 07-22 10:18 | 20m | -10 / +5 | TF4M | -14 / -5 | 3 | Partial capture |
| 07-16 19:13 | 20m | -4 / - | 7Q7EB | - / -5 | 3 | Partial capture |
| 07-16 19:12 | 20m | -9 / - | 9J2FI | - / +2 | 3 | ✓ Closing fragment |
| 07-13 07:31 | 20m | -10 / - | 5N0YEN | - / - | 26 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 101815 -11 2095 TF4M DF4RD JN59 101830 -14 2495 DF4RD TF4M +05 101845 -9 2095 TF4M DF4RD R-05 101900 -14 2495 DF4RD RR73; DB5AE <...> -16 101915 -14 2095 CQ DF4RD JN59 094615 +9 2918 TK5K DF4RD JN59 (x4) 094800 -13 533 DF4RD TK5K RR73 160615 -3 2353 DF4RD 3V8HP +13 (x2) 160745 -14 2353 DF4RD US3EW KN78 (x3)
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.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee