KS4S — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FM04

Receiver-side FT8 activity involving KS4S, decoded by SO8OO in southeastern Poland. 52 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-14 and 2026-10-20.

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 52 FT8 messages attributed to KS4S as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (94%), followed by 40 m (6%). Most decodes (92%) fell within the six-hour window 21:00-03:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (75%); the estimated median was -19 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-19 dB

Estimated median S/N

Bands

40m · 3 20m · 49

First attributed message: 2026-06-14
Last attributed message: 2026-10-20 03:15 UTC

Observed FT8 message patterns

Attributed sample: 52 messages
Active dates: 9 UTC dates
Estimated median S/N: -19 dB
Estimated 10th-90th percentile: -23 to -12 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 39, moderate (-15 to -9 dB) 8, strong (≥ -8 dB) 5.

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 KS4S in decoded directed-looking exchanges:

5B4AMX · Cyprus GE0KUC · England K0NEB · United States MW1CFA · Wales N5LL · United States N5LOW · United States ON1AEY · Belgium RU3SD · European Russia SV5BYP · Dodecanese F4EQH · France IK0QDM · Italy IU5HIU · Italy

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 KS4S

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: FM04 · 31 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,837 km (approx.)
Last such locator decoded: 2026-08-24 21:41 UTC

Other locator fields attributed to this token: FM03 (1).

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	KS4S S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-20 03:23	40m	- / -10	IK2YYO	-2 / -	10	Partial capture
10-20 03:19	40m	- / -	F6FHZ	-21 / -	2	Partial capture
10-20 03:14	40m	- / -	ON8WR	-9 / -	3	Partial capture
10-20 03:11	40m	- / -	YY5EHT	-22 / -	2	✓ Closing fragment
10-19 03:42	40m	- / -19	IK0QDM	-11 / -	4	✓ Closing fragment
10-19 03:36	40m	- / -	TA3JOH	-16 / -	2	Partial capture
10-19 03:30	40m	- / -	EA5XA	-16 / -	5	Partial capture
10-19 03:29	40m	- / -13	F1PBZ	+10 / -	3	Partial capture
10-19 03:24	40m	- / 0	F4EQH	-2 / -	2	✓ Closing fragment
10-03 00:34	60m	- / -10	PE1MHY	0 / -	2	✓ Closing fragment
10-03 00:31	60m	- / -18	G0AZH	-8 / -	3	✓ Closing fragment
09-29 03:34	40m	- / -16	GM6URC	-16 / -	3	Partial capture
09-29 03:30	40m	- / -11	F1PBZ	+3 / -	3	Partial capture
09-23 04:16	40m	- / -15	LZ936BA	+6 / -	2	Partial capture
09-02 03:34	40m	- / -1	W4CHA	-4 / -	2	✓ Closing fragment
08-28 02:46	20m	-21 / -	K9SCK	- / -8	3	Partial capture
08-27 04:31	20m	- / -	UB4FGK	-4 / -	8	Partial capture
08-24 22:57	20m	-19 / -	N5LL	- / -6	2	✓ Closing fragment
08-24 21:40	20m	-17 / -	KC1OXG	- / -	2	Partial capture
08-24 21:16	20m	-24 / -13	KB1FJC	-20 / -	2	Partial capture
08-24 21:03	20m	-12 / -	VE7GKH	- / -	2	Partial capture
08-24 20:53	20m	- / -19	MW1CFA	-14 / -	2	✓ Closing fragment
08-24 20:07	20m	- / -	M0ARF	-6 / -	5	Partial capture
08-24 20:05	20m	- / -23	M0PEI	-13 / -	4	Partial capture
08-23 02:37	20m	-20 / -10	ON3KJU	-1 / -	9	Partial capture
08-23 02:32	20m	-21 / -	WC9I	- / -	5	Partial capture
08-23 02:31	20m	-20 / -	AB2OQ	- / -	2	Partial capture
08-20 23:20	20m	-22 / -	AE4X	- / -	2	Partial capture
08-20 23:16	20m	-20 / -	W0OVX	- / -13	3	Partial capture
08-20 23:15	20m	-17 / -	GE0KUC	- / -1	3	✓ Closing fragment
08-20 21:01	20m	-24 / -	KJ5PWR	- / -12	2	Partial capture
08-20 02:08	60m	- / -18	OJ0YL	+2 / -	2	Partial capture
08-20 01:40	60m	- / -	F5PBG	-14 / -	3	Partial capture
08-20 01:20	40m	- / -14	LZ2IP	-1 / -	8	Partial capture
08-19 23:47	40m	- / -14	IU5HIU	-10 / -	2	✓ Closing fragment
08-15 03:27	20m	- / -12	SV5BYP	-13 / -	4	✓ Closing fragment
08-15 03:19	20m	- / +1	5B4AMX	-12 / -	2	✓ Closing fragment
08-10 04:26	40m	- / -	F1HFP	-15 / -	3	Partial capture
08-03 04:48	40m	- / +2	IK2SYK	-14 / -	8	Partial capture

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

40m

UTC    dB Audio  Message
031515 -17 1891  SP6FME KS4S -15
031530 -14 1890  KS4S ON8WR JO11
031900 -22 1891  KS4S F6FHZ JN18 (x2)
032300 -12 1635  KS4S PD2JR JO21
032330  -4 1682  KS4S IK2YYO JN55 (x10)

60m

UTC    dB Audio  Message
013315 -20 1329  KS4S 9A4ZM JN86
014015 -14 1333  KS4S F5PBG IN78 (x3)
020800  +4 1256  KS4S OJ0YL -18 (x2)
042645 -19  931  KS4S 6Y5HN +00
003145  -7  776  KS4S G0AZH IO83 (x3)
003445  +2  674  KS4S PE1MHY -10 (x2)
011400 -19 1084  KS4S LY8O RR73

20m

UTC    dB Audio  Message
214345 -12 1364  N5LOW KS4S 73
225700 -20 1448  N5LL KS4S R-06 (x2)
043115  -9 1169  KS4S UB4FGK LO33 (x8)
024630 -17 1356  K9SCK KS4S R-08 (x3)
025115  -2 2857  KS4S RX9ABI MO05

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.

Explore CW reception at SO8OO

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