S55DK — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving S55DK, decoded by SO8OO in southeastern Poland. 26 FT8 messages attributed to this token as transmitter, on 20m, across 1 UTC dates in the available aggregate history. Last observed 2026-07-19.
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 26 FT8 messages attributed to S55DK as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -4 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 26 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -4 dB
- Estimated 10th-90th percentile
- -15 to +2 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 8, strong (≥ -8 dB) 16.
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 S55DK in decoded directed-looking exchanges:
Most frequent locator attributed to S55DK
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
- JN75 · 8 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 708 km (approx.)
- Last such locator decoded
- 2026-07-19 05:47 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 | S55DK S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-23 04:44 | 20m | - / -16 | RW6HPS | +14 / - | 2 | ✓ Closing fragment |
| 08-07 06:38 | 20m | - / - | EA5KB | -16 / - | 2 | ✓ Closing fragment |
| 07-19 05:46 | 20m | -15 / - | SP3DOF | - / - | 3 | Partial capture |
| 07-19 05:44 | 20m | -11 / - | EA3IZF | - / - | 2 | Partial capture |
| 07-19 05:42 | 20m | +1 / - | PD1PET | - / -20 | 3 | ✓ Closing fragment |
| 07-19 05:41 | 20m | -2 / - | G8GRG | - / +1 | 2 | ✓ Closing fragment |
| 07-19 05:38 | 20m | +2 / -7 | M7BQC | -4 / - | 6 | ✓ Closing observed |
| 07-19 05:38 | 20m | -3 / - | YO8RQP | - / - | 2 | ✓ Closing fragment |
| 07-19 05:37 | 20m | 0 / - | KK5JY | - / -19 | 3 | ✓ Closing fragment |
| 07-19 05:32 | 20m | -10 / -8 | CR7BUJ | -15 / -12 | 4 | ✓ Full exchange observed |
| 07-19 05:28 | 20m | -10 / - | SP9D | - / - | 2 | ✓ Closing fragment |
| 07-19 05:21 | 20m | -16 / - | VE3EZZ | - / -24 | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 054130 -3 2785 G8GRG S55DK R+01 (x2) 054230 -2 2772 PD1PET S55DK JN75 (x3) 054415 -11 1576 EA3IZF S55DK JN75 (x2) 054600 -16 1867 SP3DOF S55DK JN75 (x3) 200530 -17 1141 S55DK M9LCB RR73 063800 -20 1635 S55DK EA5KB +11 (x2) 044415 +15 485 S55DK RW6HPS R-16 (x2)
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