KS4RF — 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 KS4RF, decoded by SO8OO in southeastern Poland. 99 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 13 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-08-27.
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 99 FT8 messages attributed to KS4RF as the transmitting token by decoded message structure across 13 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (76%), followed by 40 m (23%) and 80 m (1%). Most decodes (100%) fell within the six-hour window 23:00-05:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.
Overview
Bands
Last attributed message: 2026-08-27 03:11 UTC
Observed FT8 message patterns
- Attributed sample
- 99 messages
- Active dates
- 13 UTC dates
- Estimated median S/N
- -11 dB
- Estimated 10th-90th percentile
- -20 to -2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 25, moderate (-15 to -9 dB) 34, strong (≥ -8 dB) 40.
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 KS4RF 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 KS4RF
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
- EM72 · 38 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,369 km (approx.)
- Last such locator decoded
- 2026-08-27 03:08 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 | KS4RF S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-07 02:09 | 80m | - / - | EA1IOK | +4 / - | 3 | Partial capture |
| 10-06 01:02 | 40m | - / +6 | C5R | -20 / - | 2 | Partial capture |
| 09-02 00:19 | 40m | - / -1 | CT3IQ | -18 / - | 2 | Partial capture |
| 08-27 03:06 | 20m | -16 / - | 9H4CM | - / - | 4 | Partial capture |
| 08-27 03:01 | 40m | -14 / -13 | SP7IIT | -14 / -6 | 3 | ✓ Full exchange observed |
| 08-21 00:10 | 20m | - / -18 | YO4NF | -5 / - | 2 | Partial capture |
| 08-20 23:34 | 20m | - / -15 | YO4NF | +17 / - | 2 | Partial capture |
| 08-20 23:32 | 20m | -6 / - | 8Z1IT | -4 / -8 | 6 | ✓ Closing observed |
| 08-20 23:05 | 20m | - / +5 | YV6BXN | -12 / - | 2 | ✓ Closing fragment |
| 08-20 04:05 | 40m | - / - | YO6QDY | -8 / - | 4 | Partial capture |
| 08-20 04:03 | 40m | -15 / - | EB3JT | - / -14 | 2 | Partial capture |
| 08-20 04:01 | 40m | - / - | PC2F | -4 / - | 5 | Partial capture |
| 08-20 03:55 | 40m | -14 / - | TN8GD | - / -12 | 5 | Partial capture |
| 08-20 03:54 | 40m | - / - | YO6QDY | -8 / - | 6 | Partial capture |
| 08-20 03:53 | 40m | - / - | YO9IAB | +11 / - | 4 | Partial capture |
| 08-20 03:49 | 40m | -17 / -8 | YO4GIY | -8 / -23 | 9 | ✓ Full exchange observed |
| 08-20 03:47 | 40m | - / - | YO6QDY | -14 / - | 2 | Partial capture |
| 08-20 03:46 | 40m | - / - | SV2AOB | -2 / - | 2 | Partial capture |
| 08-20 03:45 | 40m | -8 / - | NE5TX | - / - | 2 | ✓ Closing fragment |
| 08-20 03:42 | 40m | -6 / - | OM8GT | - / -17 | 4 | Partial capture |
| 08-20 03:40 | 40m | - / -11 | G4RYE | +3 / - | 5 | Partial capture |
| 08-20 03:39 | 40m | -8 / - | OM8GT | - / - | 2 | Partial capture |
| 08-15 00:59 | 20m | - / - | IW2MYH | -23 / - | 3 | Partial capture |
| 08-15 00:57 | 20m | - / -6 | A71QQ | -16 / - | 2 | ✓ Closing fragment |
| 08-12 19:48 | 20m | - / -10 | LZ2VQ | -10 / - | 2 | Partial capture |
| 08-12 19:47 | 20m | - / -16 | LY7T | -14 / - | 2 | ✓ Closing fragment |
| 08-12 19:44 | 20m | - / - | R6FFB | +1 / - | 2 | Partial capture |
| 08-09 21:59 | 20m | - / - | RA3ZH | -5 / - | 3 | Partial capture |
| 08-06 02:36 | 40m | - / - | F5RRS | -18 / - | 2 | Partial capture |
| 08-06 02:26 | 20m | - / -6 | DL4GCJ | -15 / - | 3 | Partial capture |
| 08-04 01:54 | 40m | - / - | EB3JT | -8 / - | 2 | Partial capture |
| 08-04 01:53 | 40m | - / - | RN6HK | -8 / - | 2 | Partial capture |
| 08-02 04:28 | 40m | - / - | YO9IAB | -1 / - | 8 | Partial capture |
| 08-02 04:19 | 20m | - / - | RV3QI | -2 / - | 2 | ✓ Closing fragment |
| 08-02 04:09 | 20m | -6 / - | IC8TEM | - / -5 | 2 | Partial capture |
| 08-02 04:08 | 20m | - / - | RA6AVP | -14 / - | 6 | Partial capture |
| 08-02 04:06 | 20m | -13 / - | OM0RX | - / - | 3 | Partial capture |
| 08-02 04:04 | 20m | - / -16 | R2BQM | -18 / - | 2 | Partial capture |
| 08-02 04:03 | 20m | -14 / - | UT3RS | - / +8 | 2 | ✓ Closing fragment |
| 08-02 04:02 | 20m | -12 / - | HK3W | - / -7 | 2 | ✓ Closing fragment |
| 08-02 04:01 | 20m | - / - | RA6AVP | -14 / - | 4 | Partial capture |
| 08-02 04:01 | 20m | -9 / - | SP7IIT | - / - | 2 | ✓ Closing fragment |
| 07-31 01:28 | 40m | - / - | F5RRS | -15 / - | 4 | Partial capture |
| 07-30 09:08 | 20m | - / - | PD1ADA | -19 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 020900 +3 559 KS4RF EA1IOK IN62 (x3)
UTC dB Audio Message 040300 -6 921 KS4RF PC2F JO22 (x2) 040345 -15 921 EB3JT KS4RF -14 (x2) 040500 -8 1601 KS4RF YO6QDY KN26 (x4) 030130 -14 1085 KS4RF SP7IIT -13 030145 -14 1084 SP7IIT KS4RF R-06 030200 -15 1086 KS4RF SP7IIT RR73 001915 -18 1508 KS4RF CT3IQ -01 (x2) 010230 -20 1666 KS4RF C5R +06 (x2)
UTC dB Audio Message 233345 -4 549 KS4RF 8Z1IT RR73 233400 -6 546 8Z1IT KS4RF R-08 233415 -3 549 KS4RF 8Z1IT RR73 233445 +22 546 KS4RF YO4NF -15 (x4) 030515 -2 465 RI1FJL KS4RF R+10 030645 -17 1647 9H4CM KS4RF EM72 (x4) 031030 -15 2280 KS4RF R6FY LN05 031045 -20 1575 IZ0MIO KS4RF RR73 031145 -22 1574 F5LOW KS4RF 73
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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