5Z4RS — 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: Kenya Most frequent locator attributed to this token: KI88

Receiver-side FT8 activity involving 5Z4RS, decoded by SO8OO in southeastern Poland. 40 FT8 messages attributed to this token as transmitter, on 10m, across 3 UTC dates in the available aggregate history. Observed between 2026-09-24 and 2026-10-21.

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 40 FT8 messages attributed to 5Z4RS as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (100%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (78%); the estimated median was -20 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-20 dB

Estimated median S/N

Bands

10m · 40

First attributed message: 2026-09-24
Last attributed message: 2026-10-21 12:46 UTC

Observed FT8 message patterns

Attributed sample: 40 messages
Active dates: 3 UTC dates
Estimated median S/N: -20 dB
Estimated 10th-90th percentile: -23 to -14 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 31, moderate (-15 to -9 dB) 9, 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 5Z4RS in decoded directed-looking exchanges:

CT2JMA · Portugal E70N · Bosnia-Herzegovina F4BLY · France F4EXC · France F4IDN · France G0JEI · England G7RTI · England LY2MM · Lithuania LZ3BS · Bulgaria MI0OBC · Northern Ireland ON5AT · Belgium PA3FQK · Netherlands

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 5Z4RS

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: KI88
SO8OO receiver locator: KN09VW
Locator-centre separation: 5,901 km (approx.)
Last such locator decoded: 2026-09-24 13:39 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	5Z4RS S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-21 13:43	10m	- / -12	CT2JMA	-2 / -	2	✓ Closing fragment
10-21 13:18	10m	- / -	CR7BUW	-18 / -	2	Partial capture
10-21 11:56	10m	- / +6	EA7LPL	-16 / -	4	Partial capture
10-21 10:10	10m	- / -	CR7BUW	-24 / -	2	Partial capture
10-03 15:31	10m	- / -	TA1MB	-14 / -	2	Partial capture
10-03 13:25	10m	-20 / -	F4BLY	- / -9	2	✓ Closing fragment
10-03 12:39	10m	-22 / -	R3DQT	- / -	2	Partial capture
10-03 12:11	10m	- / +2	F4EXC	-17 / -	2	✓ Closing fragment
10-03 11:58	10m	- / -	UB8CSU	-22 / -	2	Partial capture
10-03 11:51	10m	- / +5	UB8CSU	-16 / -	4	✓ Closing fragment
09-24 13:41	10m	-11 / -	LZ3BS	- / +8	2	✓ Closing fragment
09-24 13:41	10m	- / -8	Z34K	-5 / -	30	✓ Closing fragment
09-24 13:40	10m	-12 / -	G0JEI	- / -3	2	✓ Closing fragment
09-24 12:53	10m	- / -	CT7AUT	-2 / -	3	Partial capture
09-24 12:43	10m	- / -	CT7AUT	-2 / -	3	Partial capture
09-23 11:44	80m	- / -12	OE5ABL	-16 / -	2	Partial capture
09-22 17:56	40m	- / -22	Z34K	-4 / -	3	Partial capture
09-22 17:29	40m	- / -	M1KAC	-4 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
115230 -14 1594  5Z4RS CR7BUW IM58
115600 -14 2349  5Z4RS EA7LPL IM86 (x4)
120315 -19 2234  YU1LM 5Z4RS R-11
121145 -23 2234  4U1A 5Z4RS +05
124415 -19 2233  4X1ZQ 5Z4RS -04
124645 -21 2233  RC2DD 5Z4RS RR73
131800 -16 1593  5Z4RS CR7BUW IM58 (x4)
134330  -7 2222  5Z4RS CT2JMA -12 (x2)

80m

UTC    dB Audio  Message
114400 -19 2288  5Z4RS OE5ABL -12 (x2)

40m

UTC    dB Audio  Message
172930  -4  546  5Z4RS M1KAC JO01 (x2)
175615  -9  235  5Z4RS Z34K R-22 (x3)

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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