DK1SF — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving DK1SF, decoded by SO8OO in southeastern Poland. 17 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-22 and 2026-08-29.
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 17 FT8 messages attributed to DK1SF as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (53%), followed by 20 m (47%). In this small sample, the estimated median decoder S/N was -2 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-08-29 21:17 UTC
Observed FT8 message patterns
- Attributed sample
- 17 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- -2 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) 3, strong (≥ -8 dB) 14.
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 DK1SF in decoded directed-looking exchanges:
Most frequent locator attributed to DK1SF
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
- JO42 · 11 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 934 km (approx.)
- Last such locator decoded
- 2026-08-29 21:17 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 | DK1SF S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-29 16:35 | 20m | -6 / - | AP2TN | - / -12 | 4 | Partial capture |
| 08-24 20:47 | 20m | -9 / - | BG7BMG | - / -4 | 2 | Partial capture |
| 08-24 20:44 | 20m | -4 / - | BG7BVI | - / +6 | 2 | Partial capture |
| 08-22 21:33 | 80m | -2 / +3 | DK7ZT | +10 / +8 | 7 | ✓ Full exchange observed |
| 08-22 21:29 | 80m | +7 / -3 | SM3IZB | +5 / -1 | 9 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 213030 +8 2148 SM3IZB DK1SF JO42 (x4) 213215 +4 2149 DK1SF SM3IZB -03 213230 +11 2148 SM3IZB DK1SF R-01 213245 +6 2150 DK1SF SM3IZB RR73 213315 +12 2148 DK1SF DK7ZT +03 (x5) 213630 -2 2149 DK7ZT DK1SF R+08 213645 +7 2148 DK1SF DK7ZT RR73 211700 -7 2254 R9SS DK1SF JO42
UTC dB Audio Message 181130 -24 2335 DK1SF YB7FII -15 204430 -3 2045 BG7BVI DK1SF JO42 (x2) 204715 -11 2275 BG7BMG DK1SF JO42 (x2) 163545 -10 2265 AP2TN DK1SF JO42 (x4)
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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