ZL4SY — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving ZL4SY, decoded by SO8OO in southeastern Poland. 1 FT8 messages attributed to this token as transmitter, on 80m, across 1 UTC dates in the available aggregate history. Last observed 2026-09-19.
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 1 FT8 messages attributed to ZL4SY as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The available sample contains attributed decodes on 80 m (100%). The sample is too small to infer a recurring UTC-hour or received-S/N pattern.
Overview
Observed FT8 message patterns
- Attributed sample
- 1 messages
- Active dates
- 1 UTC dates
- S/N summary
- Too few decodes
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
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 ZL4SY in decoded directed-looking exchanges:
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 | ZL4SY S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-19 17:26 | 80m | - / - | S52DD | +4 / - | 2 | Partial capture |
| 09-19 17:25 | 80m | - / -17 | SP6JIU | +7 / - | 3 | ✓ Closing fragment |
| 09-19 17:23 | 80m | -24 / -10 | IZ7NLJ | +3 / -25 | 7 | Partial capture |
| 09-19 17:23 | 80m | - / - | S52DD | +6 / - | 2 | Partial capture |
| 09-18 05:02 | 40m | - / - | SP2BBQ | 0 / - | 2 | Partial capture |
| 09-17 05:50 | 40m | - / - | F6ASP | -16 / - | 2 | Partial capture |
| 08-22 04:49 | 20m | - / - | F4LNM | +3 / - | 5 | Partial capture |
| 08-21 07:11 | 40m | - / - | DK1AJ | 0 / - | 2 | Partial capture |
| 08-19 07:10 | 40m | - / -25 | IZ3ERM | -14 / - | 3 | ✓ Closing fragment |
| 08-19 07:04 | 40m | - / - | IZ3ERM | -17 / - | 4 | Partial capture |
| 08-19 06:45 | 40m | - / - | HB9EBM | -10 / - | 2 | Partial capture |
| 08-19 06:40 | 40m | - / -16 | DH9DR | -21 / - | 3 | ✓ Closing fragment |
| 08-19 06:08 | 40m | - / - | IZ5EME | -7 / - | 10 | Partial capture |
| 08-19 05:58 | 40m | - / - | HG1DBQ | -10 / - | 8 | Partial capture |
| 08-19 05:58 | 40m | - / -10 | S54E | -16 / - | 4 | ✓ Closing fragment |
| 08-19 05:54 | 40m | - / - | IZ3ATV | -18 / - | 4 | Partial capture |
| 08-19 05:50 | 40m | - / - | PD8MD | -15 / - | 3 | Partial capture |
| 08-19 05:47 | 40m | - / - | OE3HPT | -18 / - | 6 | Partial capture |
| 08-19 05:43 | 40m | - / - | YO6LM | -10 / - | 2 | Partial capture |
| 08-19 05:39 | 40m | - / -12 | IZ5SIH | -12 / - | 2 | ✓ Closing fragment |
| 08-19 05:37 | 40m | - / - | YO6LM | -16 / - | 2 | Partial capture |
| 08-19 05:32 | 40m | - / - | YO6LM | -8 / - | 2 | Partial capture |
| 08-19 05:30 | 40m | - / - | IZ5SIH | -7 / - | 3 | Partial capture |
| 08-19 05:27 | 40m | - / - | DG1KDD | -9 / - | 4 | Partial capture |
| 08-17 06:54 | 20m | - / - | F1JPG | -5 / - | 2 | Partial capture |
| 08-16 20:29 | 40m | - / -14 | LZ1GC | -8 / - | 3 | Partial capture |
| 08-16 20:23 | 40m | - / - | LZ1GC | 0 / - | 2 | Partial capture |
| 08-16 20:15 | 40m | - / -21 | IW0RGN | -6 / - | 6 | ✓ Closing fragment |
| 08-16 20:15 | 40m | - / -24 | LZ1GC | -10 / - | 6 | Partial capture |
| 08-11 06:06 | 20m | - / - | F5NNN | -12 / - | 2 | Partial capture |
| 07-25 05:15 | 20m | - / - | DL1R | -2 / - | 9 | Partial capture |
| 07-11 20:48 | 20m | - / - | IZ8NON | -20 / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 172300 +9 396 ZL4SY S52DD JN75 172300 +10 800 ZL4SY IZ7NLJ JN81 172300 -10 1838 ZL4SY DL8HD JN68 172330 +2 396 ZL4SY S52DD JN75 172345 -24 479 IZ7NLJ ZL4SY -25 172400 +2 801 ZL4SY IZ7NLJ JN81 (x2) 172500 +5 2252 ZL4SY SP6JIU JO80 172500 +3 800 ZL4SY IZ7NLJ R-10 172530 +7 2252 ZL4SY SP6JIU R-17 172530 -1 801 ZL4SY IZ7NLJ R-10 172600 +8 2252 ZL4SY SP6JIU 73 172600 +2 310 ZL4SY S52DD JN75 172600 +2 800 ZL4SY IZ7NLJ R-10 172630 +6 310 ZL4SY S52DD JN75
UTC dB Audio Message 064700 -10 2510 ZL4SY HB9EBM JN37 070130 -22 2090 ZL4SY DH5BM JO41 070400 -16 1660 ZL4SY IZ3ERM JN55 (x7) 071130 -1 2516 ZL4SY DK1AJ JO42 (x2) 055045 -15 600 ZL4SY F6ASP JO00 (x2) 050230 +3 2269 ZL4SY SP2BBQ JO84 (x2)
UTC dB Audio Message 051800 +1 2671 ZL4SY DL1R JN58 (x4) 055930 -3 2635 ZL4SY F1PBZ -06 060630 -14 734 ZL4SY F5NNN IN94 (x2) 041500 -18 1265 ZL4SY UR5SG KN28 065415 -5 2025 ZL4SY F1JPG JN06 (x2) 044915 +7 1209 ZL4SY F4LNM JN09 (x5)
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