ZC4OL — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving ZC4OL, decoded by SO8OO in southeastern Poland. 90 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 3 UTC dates in the available aggregate history. Observed between 2026-09-27 and 2026-09-30.
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 90 FT8 messages attributed to ZC4OL as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (99%), followed by 80 m (1%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (84%); the estimated median was -3 dB.
Overview
Bands
Last attributed message: 2026-09-30 19:00 UTC
Observed FT8 message patterns
- Attributed sample
- 90 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- -3 dB
- Estimated 10th-90th percentile
- -10 to +3 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 76.
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 ZC4OL 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 ZC4OL
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
- KM64
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,944 km (approx.)
- Last such locator decoded
- 2026-09-27 22:18 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 | ZC4OL S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-30 21:10 | 40m | - / - | RD5Q | -2 / - | 2 | Partial capture |
| 09-30 19:05 | 80m | - / -14 | EB5JKV | -14 / - | 6 | Partial capture |
| 09-30 19:05 | 80m | - / -14 | R3BDQ | -12 / - | 2 | Partial capture |
| 09-30 19:02 | 80m | - / - | SV8TCK | -24 / - | 2 | Partial capture |
| 09-30 19:02 | 80m | - / - | LZ2VQ | -8 / - | 2 | Partial capture |
| 09-30 19:02 | 80m | - / - | UA1OIZ | +4 / - | 3 | Partial capture |
| 09-30 19:01 | 80m | - / -14 | R3BDQ | -10 / - | 2 | Partial capture |
| 09-30 19:01 | 80m | - / - | HA5OV | +5 / - | 6 | Partial capture |
| 09-30 19:01 | 80m | - / - | R3ZMM | -12 / - | 5 | Partial capture |
| 09-30 19:00 | 80m | - / - | DK1MAX | -3 / - | 3 | Partial capture |
| 09-30 19:00 | 80m | - / - | LB0EI | -2 / - | 5 | Partial capture |
| 09-30 19:00 | 80m | - / -10 | YO2MAX | +4 / - | 7 | ✓ Closing fragment |
| 09-30 19:00 | 80m | - / - | IK0PHY | -6 / - | 7 | Partial capture |
| 09-30 19:00 | 80m | - / - | UY7VV | +2 / - | 10 | Partial capture |
| 09-30 18:59 | 80m | - / - | R4FV | -12 / - | 3 | Partial capture |
| 09-30 18:59 | 80m | - / - | RY3K | -12 / - | 6 | Partial capture |
| 09-30 18:59 | 80m | - / - | RA4FHO | -6 / - | 7 | Partial capture |
| 09-30 18:59 | 80m | - / - | SP3BPU | +6 / - | 7 | Partial capture |
| 09-30 18:59 | 80m | - / - | SV8JE | -14 / - | 9 | Partial capture |
| 09-30 18:58 | 80m | - / - | R2SDZ | -4 / - | 4 | Partial capture |
| 09-30 18:57 | 80m | - / -21 | OE5GQQ | -3 / - | 3 | Partial capture |
| 09-30 18:57 | 80m | - / - | R3HH | -4 / - | 8 | Partial capture |
| 09-30 18:57 | 80m | - / - | OM3RP | +13 / - | 6 | Partial capture |
| 09-30 18:56 | 80m | - / - | IK5CHL | -10 / - | 10 | Partial capture |
| 09-30 18:56 | 80m | - / - | R2HB | -1 / - | 3 | Partial capture |
| 09-30 18:55 | 80m | - / - | I7DFV | +4 / - | 11 | Partial capture |
| 09-30 18:55 | 80m | - / - | SP3FLY | +7 / - | 3 | Partial capture |
| 09-30 18:54 | 80m | -24 / - | F5UKW | -1 / - | 12 | ✓ Closing observed |
| 09-30 18:54 | 80m | - / -23 | LA9GX | -4 / - | 5 | ✓ Closing fragment |
| 09-30 18:54 | 80m | - / - | PE5T | +6 / - | 6 | Partial capture |
| 09-30 18:54 | 80m | - / - | R3HH | -6 / - | 2 | Partial capture |
| 09-30 18:54 | 80m | - / - | YO4GIY | -8 / - | 4 | Partial capture |
| 09-30 18:54 | 80m | - / - | R4FV | -10 / - | 2 | Partial capture |
| 09-30 18:53 | 80m | - / - | SV8JE | -2 / - | 5 | Partial capture |
| 09-30 18:52 | 80m | - / - | G4EZT | -8 / - | 2 | Partial capture |
| 09-30 18:52 | 80m | - / - | IU8SDA | -4 / - | 4 | Partial capture |
| 09-30 18:52 | 80m | - / - | RA4FHO | -6 / - | 4 | Partial capture |
| 09-30 18:51 | 80m | - / - | IK7FPV | -4 / - | 14 | Partial capture |
| 09-30 18:51 | 80m | - / - | R7HL | -12 / - | 2 | Partial capture |
| 09-30 18:51 | 80m | - / -7 | IT9VCE | -10 / - | 10 | Partial capture |
| 09-30 18:50 | 80m | - / - | IK5CHL | -7 / - | 7 | Partial capture |
| 09-30 18:50 | 80m | - / - | IK5PWJ | +1 / - | 26 | Partial capture |
| 09-30 18:50 | 80m | - / -12 | OE6BME | -4 / - | 2 | Partial capture |
| 09-30 18:50 | 80m | - / -13 | UR4LRG | -3 / - | 24 | Partial capture |
| 09-30 18:50 | 80m | - / -13 | HA7XL | +14 / - | 8 | ✓ Closing fragment |
| 09-30 18:50 | 80m | - / - | OK1YQ | +18 / - | 34 | Partial capture |
| 09-30 18:50 | 80m | - / -12 | OM2DX | +14 / - | 6 | ✓ Closing fragment |
| 09-30 18:49 | 80m | - / - | IU8SDA | -8 / - | 2 | Partial capture |
| 09-30 18:49 | 80m | - / - | IV3SKB | +12 / - | 20 | Partial capture |
| 09-30 18:49 | 80m | - / - | LZ5EO | +3 / - | 15 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 224630 -5 2923 HK3X ZC4OL RR73 224700 -2 2924 V47YA ZC4OL -06 224715 -15 1318 ZC4OL F6FDY JN33 224715 -13 2719 ZC4OL DF9OX JO53 224730 -3 2924 V47YA ZC4OL -06 224745 -5 1319 ZC4OL F6FDY JN33 224800 -5 2924 V47YA ZC4OL -06 224815 +1 1799 ZC4OL R5BM KO85 224815 -6 1319 ZC4OL F6FDY JN33 224845 -3 1799 ZC4OL R5BM KO85 224845 -10 1319 ZC4OL F6FDY JN33 194700 -6 2796 ZC4OL UA1OIZ LP04 211030 -2 1008 ZC4OL RD5Q KO90 (x2) 175600 +9 2684 ZC4OL YL3HI KO16
UTC dB Audio Message 190645 +24 972 ZC4OL OK1YQ JN79 190645 +5 851 ZC4OL IK5PWJ JN53 190645 -5 2544 ZC4OL EA3GCV JN01 190715 +19 972 ZC4OL OK1YQ JN79 (x2) 190745 -22 1840 ZC4OL EB5JKV -14 190815 +23 972 ZC4OL OK1YQ JN79 (x2) 190845 -7 1841 ZC4OL EB5JKV -14 190915 +19 972 ZC4OL OK1YQ JN79 190915 -21 1841 ZC4OL EB5JKV -14 190945 +26 972 ZC4OL OK1YQ JN79 190945 -10 1840 ZC4OL EB5JKV -14 191015 +20 972 ZC4OL OK1YQ JN79 191530 +13 2656 ZC4OL 9A2AJ JN85
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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