K8SJM — reception at SO8OO
Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.
FT8 activity
Receiver-side FT8 activity involving K8SJM, decoded by SO8OO in southeastern Poland. 32 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-20 and 2026-09-21.
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 32 FT8 messages attributed to K8SJM as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (97%), followed by 40 m (3%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.
Overview
Bands
Last attributed message: 2026-09-21 23:51 UTC
Observed FT8 message patterns
- Attributed sample
- 32 messages
- Active dates
- 5 UTC dates
- Estimated median S/N
- -15 dB
- Estimated 10th-90th percentile
- -19 to -6 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 12, moderate (-15 to -9 dB) 10, 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.
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with K8SJM in decoded directed-looking exchanges:
Most frequent locator attributed to K8SJM
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
- EM79 · 12 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 7,775 km (approx.)
- Last such locator decoded
- 2026-09-21 23:51 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 | K8SJM S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-05 00:34 | 80m | - / - | UX5UO | +4 / - | 4 | Partial capture |
| 10-13 23:38 | 40m | - / - | EA2EWL | -17 / - | 4 | Partial capture |
| 10-13 23:37 | 40m | - / - | F8MRQ | +1 / - | 4 | Partial capture |
| 10-04 23:27 | 40m | - / -21 | PT7YB | -1 / - | 4 | ✓ Closing fragment |
| 10-03 23:02 | 40m | - / - | 2E0BTX | -3 / - | 2 | Partial capture |
| 10-01 23:34 | 40m | - / -16 | F4CQS | -9 / - | 12 | Partial capture |
| 10-01 23:27 | 40m | - / -14 | F4CQS | -5 / - | 5 | Partial capture |
| 09-28 01:02 | 40m | - / -18 | F4CQS | -2 / - | 3 | Partial capture |
| 09-28 00:55 | 40m | - / -6 | F1PBZ | -2 / - | 3 | Partial capture |
| 09-28 00:52 | 40m | - / -14 | F4CQS | -12 / - | 2 | Partial capture |
| 09-28 00:52 | 40m | - / -16 | ON1JP | -17 / - | 4 | Partial capture |
| 09-21 23:51 | 40m | - / - | PI4TX | -6 / - | 3 | Partial capture |
| 09-21 23:35 | 40m | - / -14 | ON3MOH | +2 / - | 3 | Partial capture |
| 09-21 23:33 | 40m | - / -14 | F4CQS | -4 / - | 6 | Partial capture |
| 09-21 23:30 | 40m | - / - | WA4YIZ | -20 / - | 4 | ✓ Closing fragment |
| 09-21 23:29 | 40m | - / -13 | ON1DGN | 0 / - | 3 | ✓ Closing fragment |
| 09-14 00:17 | 40m | - / -15 | GM6URC | -10 / - | 3 | Partial capture |
| 09-14 00:06 | 40m | - / - | PC2J | -9 / - | 4 | Partial capture |
| 09-13 02:16 | 40m | - / -15 | GM6URC | -12 / - | 4 | Partial capture |
| 09-10 22:51 | 40m | - / -13 | WB8CQV | 0 / - | 2 | ✓ Closing fragment |
| 09-06 01:35 | 40m | - / - | UR4QWW | -14 / - | 4 | Partial capture |
| 09-06 00:48 | 40m | - / -18 | T77NC | -1 / - | 9 | ✓ Closing fragment |
| 09-05 23:55 | 40m | - / -11 | ON1DGN | -13 / - | 4 | Partial capture |
| 09-05 23:54 | 40m | - / - | F1IQH | -5 / - | 2 | Partial capture |
| 09-04 02:06 | 40m | - / - | KD2BS | -13 / - | 7 | Partial capture |
| 09-04 02:01 | 40m | - / - | PC2J | 0 / - | 4 | Partial capture |
| 09-04 01:55 | 40m | - / -8 | ON1JP | -17 / - | 4 | Partial capture |
| 09-04 01:52 | 40m | - / - | PC2J | 0 / - | 2 | Partial capture |
| 09-04 01:43 | 40m | - / +4 | ON1DGN | -13 / - | 3 | Partial capture |
| 09-04 01:42 | 40m | - / - | F1PBZ | +4 / - | 3 | Partial capture |
| 09-04 01:36 | 40m | - / -7 | WA8CAC | -19 / - | 2 | ✓ Closing fragment |
| 09-04 01:34 | 40m | - / - | N3GTY | -16 / - | 2 | Partial capture |
| 09-04 00:46 | 40m | - / -8 | G5TV | -7 / - | 4 | Partial capture |
| 09-02 00:15 | 40m | - / - | G5TV | -7 / - | 3 | Partial capture |
| 09-01 01:35 | 40m | - / - | G5TV | -3 / - | 3 | Partial capture |
| 09-01 01:31 | 40m | - / - | PC2J | -10 / - | 10 | Partial capture |
| 09-01 01:26 | 40m | - / -14 | UW5KW | -17 / - | 3 | ✓ Closing fragment |
| 09-01 01:24 | 40m | - / -9 | F1PBZ | +1 / - | 3 | Partial capture |
| 09-01 01:11 | 40m | - / -16 | PC2J | -8 / - | 6 | Partial capture |
| 08-31 20:33 | 20m | - / -9 | F4JZW | -10 / - | 3 | ✓ Closing fragment |
| 08-31 20:31 | 20m | - / -9 | EA7ALL | +2 / - | 4 | ✓ Closing fragment |
| 08-31 20:22 | 20m | - / -13 | G4DBW | +4 / - | 5 | ✓ Closing fragment |
| 08-31 20:14 | 20m | - / - | 5Z4VJ | +2 / - | 2 | Partial capture |
| 08-31 04:31 | 40m | - / -12 | F1DXP | +6 / - | 2 | ✓ Closing fragment |
| 08-31 03:44 | 40m | - / - | EA5HM | -20 / - | 4 | Partial capture |
| 08-31 03:40 | 40m | - / -14 | EC3A | +4 / - | 2 | Partial capture |
| 08-31 03:34 | 40m | - / -15 | F1PBZ | +3 / - | 3 | Partial capture |
| 08-28 23:34 | 20m | - / +1 | KV1F | -14 / - | 2 | ✓ Closing fragment |
| 08-24 23:30 | 20m | -17 / -7 | HB9RYB | -11 / - | 2 | ✓ Closing observed |
| 08-24 23:06 | 20m | - / - | HB9RYB | -12 / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 003430 +7 1233 K8SJM UX5UO KO50 (x4)
UTC dB Audio Message 234115 -11 2450 K8SJM F4CQS -20 230245 -5 1990 K8SJM 2E0BTX IO83 (x2) 232730 -1 2777 K8SJM PT7YB HI06 (x4) 233700 -1 1854 K8SJM F8MRQ JN17 (x3) 233800 -17 1820 K8SJM EA2EWL IN91 233830 +3 855 K8SJM F8MRQ JN17 233900 -15 1820 K8SJM EA2EWL IN91 (x3)
UTC dB Audio Message 201530 -14 1096 K8SJM CT1GYD R-25 201930 -20 1202 K8SJM KD2PHN RR73 202245 +4 1930 K8SJM G4DBW JO01 (x5) 203145 -22 2140 K8SJM SP6TL RR73 203145 +2 922 K8SJM EA7ALL IM88 (x3) 203315 -16 1668 K8SJM F4JZW JN08 203315 +0 922 K8SJM EA7ALL RR73 203345 -7 1668 K8SJM F4JZW R-09 (x2)
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.
CW
No CW receptions recorded for this callsign in the last 30 days.
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