DO1CU — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving DO1CU, decoded by SO8OO in southeastern Poland. 17 FT8 messages attributed to this token as transmitter, on 10m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-25 and 2026-07-05.
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 DO1CU as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 10 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
- 17 messages
- Active dates
- 4 UTC dates
- Estimated median S/N
- -6 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 6, strong (≥ -8 dB) 10.
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 DO1CU in decoded directed-looking exchanges:
Attributed messages by UTC hour
Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.
Most frequent locator attributed to DO1CU
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
- JO60 · 9 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 628 km (approx.)
- Last such locator decoded
- 2026-07-05 08:20 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 | DO1CU S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-14 18:51 | 80m | - / -7 | OE3ZIO | -14 / - | 2 | ✓ Closing fragment |
| 06-30 11:19 | 10m | -3 / - | YB7WW | - / - | 2 | Partial capture |
| 06-27 12:37 | 10m | - / -2 | OH3OJ | -17 / - | 3 | ✓ Closing fragment |
| 06-27 12:28 | 10m | - / - | F4LNM | -14 / - | 3 | Partial capture |
| 06-26 11:07 | 10m | - / - | R1LP | -13 / - | 2 | Partial capture |
| 06-26 11:06 | 10m | -6 / -3 | SV2AEL | -12 / -11 | 4 | ✓ Full exchange observed |
| 06-26 11:05 | 10m | +8 / - | EW4DX | - / -3 | 2 | ✓ Closing fragment |
| 06-26 07:56 | 10m | -11 / - | YO6OGW | - / -4 | 3 | ✓ Closing fragment |
| 06-26 07:52 | 10m | -8 / -9 | 9K2HN | -14 / -2 | 5 | ✓ Full exchange observed |
| 06-25 07:53 | 10m | - / -12 | LZ4VR | -14 / - | 3 | ✓ Closing fragment |
| 06-25 07:51 | 10m | -16 / - | EA5AOP | - / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 185130 -14 2169 DO1CU OE3ZIO -07 (x2)
UTC dB Audio Message 110645 -5 1671 SV2AEL DO1CU JO60 110700 -14 1673 DO1CU SV2AEL -03 110700 -15 1495 DO1CU R1LP KO59 110715 -6 1671 SV2AEL DO1CU R-11 110730 -10 1671 DO1CU SV2AEL RR73 110800 -11 1494 DO1CU R1LP KO59 122845 -12 1932 DO1CU F4LNM JN09 (x3) 123730 -17 2006 DO1CU OH3OJ KP20 (x3) 111900 -5 2252 YB7WW DO1CU JO60 (x2) 082045 +2 496 <...> DO1CU JO60
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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