ZL4TT — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving ZL4TT, decoded by SO8OO in southeastern Poland. 313 FT8 messages attributed to this token as transmitter, on 20m, across 14 UTC dates in the available aggregate history. Observed between 2026-07-17 and 2026-08-30.
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 313 FT8 messages attributed to ZL4TT as the transmitting token by decoded message structure across 14 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Most decodes (87%) fell within the six-hour window 03:00-09:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.
Overview
Observed FT8 message patterns
- Attributed sample
- 313 messages
- Active dates
- 14 UTC dates
- Estimated median S/N
- -11 dB
- Estimated 10th-90th percentile
- -19 to 0 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 61, moderate (-15 to -9 dB) 154, strong (≥ -8 dB) 98.
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 ZL4TT 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 ZL4TT
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
- RE54 · 80 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 17,677 km (approx.)
- Last such locator decoded
- 2026-08-30 07:17 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 | ZL4TT S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-21 06:56 | 40m | - / -15 | F5IYE | -12 / - | 3 | ✓ Closing fragment |
| 09-05 05:38 | 40m | - / -10 | UZ5CA | +6 / - | 2 | Partial capture |
| 09-04 07:30 | 40m | - / -20 | F4MMH | -17 / - | 4 | Partial capture |
| 09-04 07:25 | 40m | - / - | F4MMH | -16 / - | 2 | Partial capture |
| 09-04 06:13 | 40m | - / -2 | F4GWG | +1 / - | 3 | ✓ Closing fragment |
| 09-04 06:07 | 40m | - / - | OZ1KZX | -15 / - | 3 | ✓ Closing fragment |
| 09-04 06:05 | 40m | - / - | SM7HZK | -10 / - | 2 | Partial capture |
| 09-04 06:04 | 40m | - / -20 | IZ0MYH | +6 / - | 3 | ✓ Closing fragment |
| 09-04 05:54 | 40m | - / -25 | PA3EMN | -4 / - | 3 | ✓ Closing fragment |
| 09-04 05:46 | 40m | - / - | DL7DL | -1 / - | 8 | Partial capture |
| 09-04 05:37 | 40m | - / - | DF7EE | -4 / - | 5 | Partial capture |
| 09-04 05:35 | 40m | - / -17 | M0KSE | -3 / - | 5 | ✓ Closing fragment |
| 09-04 05:34 | 40m | - / -23 | PD5MJF | -20 / - | 5 | ✓ Closing fragment |
| 09-04 05:33 | 40m | - / -19 | LY1DY | 0 / - | 4 | ✓ Closing fragment |
| 09-04 05:31 | 40m | - / -20 | DM2SP | -8 / - | 3 | ✓ Closing fragment |
| 09-04 05:28 | 40m | - / - | PD1AC | -13 / - | 3 | Partial capture |
| 09-04 05:27 | 40m | - / -15 | SP1EUS | -4 / - | 4 | ✓ Closing fragment |
| 09-04 05:24 | 40m | - / -12 | DL5EAG | +1 / - | 6 | ✓ Closing fragment |
| 09-04 05:24 | 40m | - / -22 | LA7OY | -7 / - | 6 | Partial capture |
| 09-04 05:21 | 40m | - / -16 | S56A | +12 / - | 6 | ✓ Closing fragment |
| 09-04 05:19 | 40m | - / - | SP9BGL | +19 / - | 11 | Partial capture |
| 09-04 05:19 | 40m | - / - | DL2YCD | -1 / - | 8 | Partial capture |
| 09-04 05:18 | 40m | - / - | M0DSK | +6 / - | 4 | Partial capture |
| 09-04 05:18 | 40m | - / - | M9PAS | -9 / - | 5 | Partial capture |
| 09-04 05:17 | 40m | - / -8 | DG5AAG | 0 / - | 3 | ✓ Closing fragment |
| 09-04 05:15 | 40m | - / - | IC8TEM | -3 / - | 4 | Partial capture |
| 09-04 03:52 | 40m | - / - | R2FC | -1 / - | 2 | Partial capture |
| 08-31 04:02 | 20m | - / - | R3TY | +2 / - | 2 | Partial capture |
| 08-30 08:15 | 20m | - / - | IZ3NVR | -2 / - | 2 | Partial capture |
| 08-30 07:59 | 20m | - / - | 2E0TXZ | -9 / - | 3 | ✓ Closing fragment |
| 08-30 07:56 | 20m | - / -4 | F4ASA | +11 / - | 6 | ✓ Closing fragment |
| 08-30 07:46 | 20m | - / -17 | G7SQC | -6 / - | 4 | ✓ Closing fragment |
| 08-30 07:45 | 20m | - / - | F4ASA | +10 / - | 2 | Partial capture |
| 08-30 07:44 | 20m | - / - | IW0EWI | -12 / - | 9 | Partial capture |
| 08-30 07:36 | 20m | - / - | IZ5UGE | -4 / - | 2 | Partial capture |
| 08-30 07:34 | 20m | - / +2 | G8OO | +6 / - | 8 | ✓ Closing fragment |
| 08-30 07:28 | 20m | - / - | IW0EWI | -13 / - | 3 | Partial capture |
| 08-30 07:27 | 20m | - / -14 | G7SQC | -4 / - | 2 | Partial capture |
| 08-30 07:27 | 20m | - / -10 | IZ6NAL | -8 / - | 3 | Partial capture |
| 08-30 07:18 | 20m | - / -17 | R3KF | +10 / - | 2 | Partial capture |
| 08-30 07:16 | 20m | -11 / -7 | F5SZB | +5 / - | 5 | ✓ Closing observed |
| 08-30 06:53 | 20m | -13 / -7 | G5CVL | +1 / -12 | 6 | ✓ Full exchange observed |
| 08-30 06:49 | 20m | -10 / - | N2LEE | - / -14 | 2 | Partial capture |
| 08-30 06:46 | 20m | -10 / - | N2LEE | - / -14 | 2 | Partial capture |
| 08-30 06:18 | 20m | -7 / - | IN3EQZ | - / -10 | 2 | ✓ Closing fragment |
| 08-30 06:15 | 20m | -8 / - | UB8FAS | - / -17 | 4 | Partial capture |
| 08-30 05:10 | 20m | -3 / -10 | IK8NSI | -13 / -4 | 6 | ✓ Full exchange observed |
| 08-30 05:09 | 20m | 0 / - | N4SV | - / -6 | 2 | ✓ Closing fragment |
| 08-30 05:08 | 20m | 0 / - | VE3FZG | - / -21 | 2 | ✓ Closing fragment |
| 08-30 05:02 | 20m | 0 / - | VE4ZIM | - / -8 | 4 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 061330 +3 2808 ZL4TT F4GWG IN77 (x3) 061800 -10 2268 ZL4TT F4MMH JN18 (x7) 053815 +5 2700 ZL4TT UZ5CA -10 (x2) 065600 -13 2483 ZL4TT F5IYE JN05 (x3)
UTC dB Audio Message 075730 +8 2182 ZL4TT F4ASA JN19 (x4) 075900 -6 2577 ZL4TT 2E0TXZ IO90 (x3) 080415 -23 2317 VE3PJ ZL4TT -14 080545 -24 2317 DL3KVR ZL4TT -13 080630 -8 2154 ZL4TT G4DBW JO01 081530 -8 2026 ZL4TT PD4AVT JO21 081530 -2 1852 ZL4TT IZ3NVR JN65 (x2) 040200 +2 1824 ZL4TT R3TY LO25 (x2)
UTC dB Audio Message 053300 -9 488 ZL4TT PG0DX -09 053330 +5 855 ZL4TT S57MPU JN76 053430 -8 488 ZL4TT PG0DX -09 (x3) 053730 -4 855 ZL4TT S57MPU JN76 053800 -20 1926 ZL4TT IT9JNR JM67 (x3) 054200 -19 1854 ZL4TT SM4ONW JP70 054200 -10 1167 ZL4TT IK6HRB JN63 (x3) 050100 -3 933 ZL4TT PA2S -20 (x2)
UTC dB Audio Message 215715 -15 2227 ZL4TT PD0IFI 73 220630 -3 1070 ZL4TT DG6VC JN39 (x5) 213700 -24 1884 ZL4TT PA3GDL JO22 220500 -24 1596 ZL4TT SP8PT KN09 (x3) 213000 -19 2272 ZL4TT SQ8SV KN19 (x5)
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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