J48S — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving J48S, decoded by SO8OO in southeastern Poland. 865 FT8 messages attributed to this token as transmitter, on 60m, 40m, across 6 UTC dates in the available aggregate history. Observed between 2026-09-15 and 2026-09-20.
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 865 FT8 messages attributed to J48S as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (75%), followed by 40 m (25%). Most decodes (87%) fell within the six-hour window 20:00-02:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (92%); the estimated median was -1 dB.
Overview
Bands
Last attributed message: 2026-09-20 02:37 UTC
Observed FT8 message patterns
- Attributed sample
- 865 messages
- Active dates
- 6 UTC dates
- Estimated median S/N
- -1 dB
- Estimated 10th-90th percentile
- -8 to +3 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 14, moderate (-15 to -9 dB) 58, strong (≥ -8 dB) 793.
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 J48S 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 J48S
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
- KM37 · 446 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,444 km (approx.)
- Last such locator decoded
- 2026-09-20 02:33 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 | J48S S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-20 02:34 | 60m | -2 / - | J88IH | - / -22 | 6 | Partial capture |
| 09-20 02:33 | 60m | +2 / - | W0PV | - / -14 | 2 | ✓ Closing fragment |
| 09-20 02:32 | 60m | - / - | PE1NPS | +8 / - | 4 | Partial capture |
| 09-20 02:30 | 60m | - / - | 9A4ZM | +5 / - | 2 | Partial capture |
| 09-20 02:29 | 60m | -4 / - | W4CHA | - / -22 | 2 | ✓ Closing fragment |
| 09-20 02:26 | 60m | - / - | PE1NPS | +8 / - | 3 | Partial capture |
| 09-20 02:23 | 60m | - / - | 9A4ZM | +6 / - | 2 | Partial capture |
| 09-20 02:21 | 60m | +2 / -4 | LZ2JE | +8 / -10 | 5 | ✓ Full exchange observed |
| 09-20 02:19 | 60m | - / - | MM5DWW | -12 / - | 2 | Partial capture |
| 09-20 02:19 | 60m | - / - | SP1ZMO | -2 / - | 3 | Partial capture |
| 09-20 02:11 | 60m | - / - | DL2AOM | -9 / - | 8 | Partial capture |
| 09-20 02:10 | 60m | - / - | 9A4ZM | +4 / - | 2 | Partial capture |
| 09-20 02:09 | 60m | - / - | PE1NPS | +5 / - | 3 | Partial capture |
| 09-20 02:06 | 60m | +4 / - | F5MOO | -9 / -5 | 5 | Partial capture |
| 09-20 02:02 | 60m | 0 / -12 | 5B4VL | +6 / -16 | 4 | ✓ Full exchange observed |
| 09-20 02:01 | 60m | - / - | 9A4ZM | +2 / - | 2 | Partial capture |
| 09-20 02:00 | 60m | -2 / -6 | SP8AJK | -3 / +6 | 5 | ✓ Full exchange observed |
| 09-20 01:58 | 60m | - / - | PE1NPS | +9 / - | 4 | Partial capture |
| 09-20 01:57 | 60m | -2 / - | YO5IB | - / -14 | 2 | ✓ Closing fragment |
| 09-20 01:55 | 60m | +3 / -17 | LA9JKA | -17 / -16 | 4 | ✓ Full exchange observed |
| 09-20 01:53 | 60m | 0 / - | EA8DS | - / -19 | 2 | ✓ Closing fragment |
| 09-20 01:51 | 60m | - / - | PE1NPS | +11 / - | 4 | Partial capture |
| 09-20 01:46 | 60m | 0 / - | IU5TSN | - / -12 | 2 | ✓ Closing fragment |
| 09-20 01:40 | 60m | - / -12 | 5B4VL | 0 / - | 4 | Partial capture |
| 09-20 01:40 | 60m | -2 / - | HA1SU | - / +1 | 2 | ✓ Closing fragment |
| 09-20 01:38 | 60m | - / - | PE1NPS | +7 / - | 3 | Partial capture |
| 09-20 01:35 | 60m | - / - | 9A4ZM | +4 / - | 2 | Partial capture |
| 09-20 01:31 | 60m | -2 / - | S56MLZ | -10 / -16 | 4 | ✓ Closing observed |
| 09-20 01:27 | 60m | - / - | SP1ZMO | -8 / - | 4 | Partial capture |
| 09-20 01:25 | 60m | - / - | 9A4ZM | +4 / - | 2 | Partial capture |
| 09-20 01:25 | 60m | - / - | PE1NPS | +5 / - | 4 | Partial capture |
| 09-20 01:21 | 60m | -1 / - | HA0AA | - / -5 | 2 | ✓ Closing fragment |
| 09-20 01:16 | 60m | - / - | PE1NPS | +4 / - | 4 | Partial capture |
| 09-20 01:15 | 60m | - / - | 9A4ZM | +2 / - | 2 | Partial capture |
| 09-20 01:13 | 60m | +7 / -7 | EA3NE | 0 / 0 | 5 | ✓ Full exchange observed |
| 09-20 01:10 | 60m | - / - | G1SID | -6 / - | 4 | Partial capture |
| 09-20 01:07 | 60m | +2 / -3 | DF2NV | +8 / -8 | 4 | ✓ Full exchange observed |
| 09-20 01:06 | 60m | - / - | PE1NPS | +4 / - | 4 | Partial capture |
| 09-20 01:03 | 60m | - / - | 4L7T | +2 / - | 3 | Partial capture |
| 09-20 01:03 | 60m | - / - | 9A4ZM | +3 / - | 2 | Partial capture |
| 09-20 01:01 | 60m | -1 / -14 | UN8FR | -9 / -16 | 5 | ✓ Full exchange observed |
| 09-20 00:54 | 60m | 0 / - | SP1ZMO | -11 / -22 | 9 | Partial capture |
| 09-20 00:51 | 60m | - / - | 9A4ZM | +6 / - | 2 | Partial capture |
| 09-20 00:50 | 60m | - / - | PE1NPS | +7 / - | 3 | Partial capture |
| 09-20 00:42 | 60m | +2 / - | SP9TBT | - / -12 | 2 | ✓ Closing fragment |
| 09-20 00:41 | 60m | - / - | PE1NPS | +6 / - | 4 | Partial capture |
| 09-20 00:39 | 60m | 0 / - | EB4SM | - / -10 | 2 | ✓ Closing fragment |
| 09-20 00:38 | 60m | +1 / -6 | F5RRS | -15 / -15 | 18 | ✓ Full exchange observed |
| 09-20 00:38 | 60m | -2 / - | IV3KNT | -2 / -5 | 6 | ✓ Full exchange observed |
| 09-20 00:35 | 60m | - / - | 9A4ZM | +6 / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 023200 +2 584 CQ J48S KM37 023215 +3 480 J48S PE1NPS JO22 023230 -5 584 CQ J48S KM37 023245 +8 480 J48S PE1NPS JO22 023300 -1 584 CQ J48S KM37 023315 +12 480 J48S PE1NPS JO22 023330 +3 584 W0PV J48S -14 023345 +11 480 J48S PE1NPS JO22 023400 +1 584 W0PV J48S RR73 023430 -2 584 J88IH J48S -22 (x6)
UTC dB Audio Message 203015 -4 2030 J48S G7GXK IO90 (x2) 203130 -7 684 MI0ULK J48S -07 204015 -9 830 J48S DL3MIB JN57 204045 +0 683 J48S F5PBG IN78 204115 -4 684 J48S LA7OY JO49 204115 -11 830 J48S DL3MIB R-07 204130 -6 684 CQ J48S KM37 204145 -10 830 J48S DL3MIB R-07 204230 -5 684 LA7OY J48S -22 204245 -7 684 J48S LA7OY JO49 204300 -8 684 LA7OY J48S -19 204315 -7 830 J48S DL3MIB R-07 204430 -8 684 LA7OY J48S -24 (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.
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