K9STL — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving K9STL, decoded by SO8OO in southeastern Poland. 43 FT8 messages attributed to this token as transmitter, on 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-07-20 and 2026-08-02.
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 43 FT8 messages attributed to K9STL as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (98%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (98%); the estimated median was -21 dB.
Overview
Observed FT8 message patterns
- Attributed sample
- 43 messages
- Active dates
- 7 UTC dates
- Estimated median S/N
- -21 dB
- Estimated 10th-90th percentile
- -23 to -17 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 42, moderate (-15 to -9 dB) 1, strong (≥ -8 dB) 0.
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 K9STL 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 K9STL
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
- EM58 · 28 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,082 km (approx.)
- Last such locator decoded
- 2026-08-02 04:31 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 | K9STL S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-11 13:16 | 20m | - / -13 | DK9NP | -8 / - | 2 | Partial capture |
| 08-11 12:16 | 20m | - / - | G0GHL | -13 / - | 2 | Partial capture |
| 08-11 12:09 | 20m | - / - | DL4BBH | -17 / - | 3 | Partial capture |
| 08-11 11:16 | 20m | - / - | IT9KHI | -1 / - | 7 | Partial capture |
| 08-11 09:22 | 20m | - / - | F4AWT | -10 / - | 2 | Partial capture |
| 08-11 09:21 | 20m | - / - | DF1VV | -14 / - | 2 | Partial capture |
| 08-11 09:14 | 20m | - / - | PD8L | -12 / - | 3 | Partial capture |
| 08-11 09:03 | 20m | - / -15 | M7JVH | -17 / - | 3 | Partial capture |
| 08-11 05:51 | 20m | - / - | PA3HFT | -2 / - | 3 | Partial capture |
| 08-11 05:26 | 20m | - / - | RG3H | -11 / - | 5 | Partial capture |
| 08-11 05:22 | 20m | - / - | RA5CW | -13 / - | 6 | Partial capture |
| 08-11 05:18 | 20m | - / - | YO9FQT | -12 / - | 5 | ✓ Closing fragment |
| 08-11 05:12 | 20m | - / -14 | RC5F | -13 / - | 4 | Partial capture |
| 08-11 05:04 | 20m | - / - | YO4CAI | -7 / - | 6 | Partial capture |
| 08-11 05:01 | 20m | - / - | RA3FY | -12 / - | 2 | ✓ Closing fragment |
| 08-11 04:42 | 20m | - / -7 | UA3GIE | -3 / - | 2 | ✓ Closing fragment |
| 08-11 04:34 | 20m | - / - | UB3GER | +4 / - | 2 | ✓ Closing fragment |
| 08-11 04:26 | 20m | - / - | R4FDK | -13 / - | 3 | Partial capture |
| 08-11 04:06 | 20m | - / - | EA3AKY | -14 / - | 2 | Partial capture |
| 08-11 01:48 | 20m | - / - | R7BN | -20 / - | 2 | Partial capture |
| 08-11 00:03 | 20m | - / - | IU2VBP | -20 / - | 2 | Partial capture |
| 08-10 22:36 | 20m | - / - | DM4GG | +7 / - | 5 | Partial capture |
| 08-10 22:35 | 20m | - / - | UR7IBU | -2 / - | 14 | Partial capture |
| 08-10 22:21 | 20m | - / -17 | RN3QN | -21 / - | 3 | Partial capture |
| 08-10 22:20 | 20m | - / - | DM4GG | +6 / - | 5 | Partial capture |
| 08-10 22:19 | 20m | - / - | DG1KFR | -7 / - | 4 | Partial capture |
| 08-10 21:18 | 20m | - / -4 | DF4IAF | -13 / - | 4 | ✓ Closing fragment |
| 08-10 21:09 | 20m | - / - | DM4GG | +6 / - | 4 | Partial capture |
| 08-10 20:19 | 20m | - / -7 | F6ARS | -13 / - | 2 | Partial capture |
| 08-10 11:37 | 20m | - / - | PA3DHR | -19 / - | 2 | Partial capture |
| 08-10 06:32 | 20m | - / -21 | F8TRT | -14 / - | 3 | ✓ Closing fragment |
| 08-10 05:51 | 20m | - / - | HB9IBA | -13 / - | 4 | Partial capture |
| 08-10 05:31 | 20m | - / - | 9A1KO | -6 / - | 5 | Partial capture |
| 08-10 04:28 | 20m | - / - | RV6FT | -14 / - | 2 | Partial capture |
| 08-10 04:26 | 20m | - / - | UT1US | +2 / - | 2 | Partial capture |
| 08-10 04:06 | 20m | - / - | R7OV | -10 / - | 6 | Partial capture |
| 08-10 02:58 | 20m | - / - | UA6HBJ | -12 / - | 4 | Partial capture |
| 08-09 21:59 | 20m | - / -8 | PY6HD | -12 / - | 2 | ✓ Closing fragment |
| 08-09 20:37 | 20m | - / - | EA5HM | -9 / - | 4 | Partial capture |
| 08-09 20:19 | 20m | - / - | G6OTZ | -14 / - | 2 | Partial capture |
| 08-09 19:50 | 20m | - / -16 | F4LUK | -8 / - | 4 | Partial capture |
| 08-09 19:45 | 20m | - / -16 | F4LUK | -2 / - | 3 | Partial capture |
| 08-09 17:35 | 20m | - / - | R4FDK | -22 / - | 2 | Partial capture |
| 08-09 12:50 | 20m | - / - | F6ARS | -11 / - | 4 | Partial capture |
| 08-08 22:21 | 20m | - / -3 | CR5VP | -15 / - | 2 | ✓ Closing fragment |
| 08-08 20:14 | 20m | - / - | IK0MIB | -11 / - | 2 | Partial capture |
| 08-08 20:12 | 20m | - / - | F4JRM | -13 / - | 2 | Partial capture |
| 08-08 20:07 | 20m | - / - | F4MSA | -14 / - | 3 | Partial capture |
| 08-08 20:05 | 20m | - / -12 | F1ODM | -4 / - | 2 | ✓ Closing fragment |
| 08-08 19:37 | 20m | - / -15 | F1ODM | -5 / - | 10 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 111645 +5 2915 K9STL IT9KHI JM77 (x6) 114430 -11 2319 K9STL G0GHL IO82 120900 -20 1224 K9STL DL4BBH JO42 (x3) 121600 -12 2319 K9STL G0GHL IO82 (x2) 131645 -7 580 K9STL DK9NP -13 (x2) 151945 -17 1458 K9STL HB9IBA JN47
UTC dB Audio Message 062830 -17 1955 K9STL SP9UPH JO90
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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