SM5ZAD — 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: Sweden Most frequent locator attributed to this token: JO79

Receiver-side FT8 activity involving SM5ZAD, decoded by SO8OO in southeastern Poland. 34 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-08-16.

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 34 FT8 messages attributed to SM5ZAD as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (76%), followed by 40 m (15%) and 10 m (9%). Most decodes (59%) fell within the six-hour window 14:00-20:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (62%); the estimated median was -18 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-18 dB

Estimated median S/N

Bands

40m · 5 20m · 26 10m · 3

First attributed message: 2026-06-09
Last attributed message: 2026-08-16 21:15 UTC

Observed FT8 message patterns

Attributed sample: 34 messages
Active dates: 7 UTC dates
Estimated median S/N: -18 dB
Estimated 10th-90th percentile: -24 to -9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 21, moderate (-15 to -9 dB) 12, strong (≥ -8 dB) 1.

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 SM5ZAD in decoded directed-looking exchanges:

DL6MRM · Fed. Rep. of Germany DL6ZFG · Fed. Rep. of Germany DL7BG · Fed. Rep. of Germany EA3EDU · Spain GM5GHA · Scotland HB9EFK · Switzerland HB9TWU · Switzerland IU6QLJ · Italy M6TVD · England OK4SD · Czech Republic ON5GM · Belgium PD0WL · Netherlands

Most frequent locator attributed to SM5ZAD

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: JO79 · 19 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,148 km (approx.)
Last such locator decoded: 2026-08-16 21:15 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	SM5ZAD S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-16 23:32	40m	- / -10	EW8CW	-12 / -	2	✓ Closing fragment
08-16 23:27	40m	- / -3	G1XOW	-18 / -	2	✓ Closing fragment
08-16 22:23	40m	- / -16	DD1UN	-14 / -	2	✓ Closing fragment
08-16 22:15	40m	- / -13	SP3VST	-12 / -	2	✓ Closing fragment
08-16 21:38	40m	- / -6	YO6LM	-3 / -	2	✓ Closing fragment
08-16 21:26	40m	- / -10	LZ1GC	-8 / -	2	✓ Closing fragment
08-16 20:35	40m	- / -2	ON7NQ	-4 / -	2	✓ Closing fragment
08-16 20:28	40m	- / -5	LA7DMA	-10 / -	2	✓ Closing fragment
08-16 20:24	40m	- / -4	SP2GJI	-8 / -	2	✓ Closing fragment
08-16 20:05	40m	- / -19	DB9LG	-2 / -	4	✓ Closing fragment
08-16 19:44	40m	- / -16	OK1FED	-1 / -	5	✓ Closing fragment
08-16 19:40	40m	- / -10	UR4UNR/P	0 / -	2	✓ Closing fragment
08-16 19:23	40m	- / -7	ON5RZ	-4 / -	4	✓ Closing fragment
08-16 19:19	40m	- / -8	R3LCW	-9 / -	2	✓ Closing fragment
08-16 18:52	40m	- / -20	DL8TV	-7 / -	3	✓ Closing fragment
08-16 18:33	40m	- / -20	SQ2GXO	+4 / -	2	✓ Closing fragment
08-16 18:13	40m	- / -20	R4DB	-20 / -	2	✓ Closing fragment
08-16 18:11	40m	- / -16	SQ8DIO	+1 / -	2	Partial capture
08-16 17:41	40m	- / -17	R3PY	-16 / -	2	✓ Closing fragment
08-16 17:20	40m	- / -14	DH5NC	-16 / -	2	✓ Closing fragment
08-16 14:46	40m	- / -17	UT0UE	-9 / -	2	✓ Closing fragment
08-16 14:42	40m	- / -17	DF2RG	-9 / -	3	✓ Closing fragment
08-12 19:40	20m	-9 / -15	OK4SD	+2 / -	4	✓ Closing observed
08-12 19:07	20m	-16 / -	GM5GHA	- / -21	4	✓ Closing fragment
08-12 18:44	20m	- / -	PA7TT	-13 / -	3	Partial capture
08-12 17:57	20m	- / -18	DL6MRM	-1 / -	2	✓ Closing fragment
08-12 10:03	20m	- / -22	UY0HY	-12 / -	2	✓ Closing fragment
08-12 09:45	20m	- / -16	IZ2FOS	-3 / -	3	Partial capture
08-12 08:17	20m	- / -8	DL1CBS/P	-12 / -	2	Partial capture
08-12 07:28	20m	- / -16	IW4BYK	-8 / -	4	Partial capture
08-12 07:03	20m	- / -18	HB9EFK	+2 / -	2	✓ Closing fragment
08-12 06:45	20m	- / -18	PD0WL	-23 / -	3	✓ Closing fragment
08-12 06:20	20m	- / -8	HB9TWU	-6 / -	2	✓ Closing fragment
08-12 06:16	20m	- / -17	IU6QLJ	-11 / -	2	✓ Closing fragment
08-12 05:31	20m	- / -6	EA3EDU	-14 / -	4	✓ Closing fragment
08-12 05:26	20m	- / -10	F6JON/QRP	-12 / -	4	Partial capture
08-12 05:21	20m	- / -10	<...>	-11 / -	4	Partial capture
08-12 05:11	20m	- / -16	RU6UR	-19 / -	3	✓ Closing fragment
08-12 03:23	20m	- / -21	R3OZ	-7 / -	2	✓ Closing fragment
08-12 03:07	20m	- / -9	DL6ZFG	-10 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
212715  -9 1363  SM5ZAD LZ1GC RR73
213645 -21 1464  SM5ZAD DL4CAT RR73
213815  -1 2733  SM5ZAD YO6LM -06 (x2)
215915  -9  738  SM5ZAD PD0IFI RR73
220545 -12 2613  SM5ZAD EA3EDU JN01
221545 -12 1038  SM5ZAD SP3VST -13 (x2)
222145 -16 1229  SM5ZAD M0PPT RR73
222345 -13 2092  SM5ZAD DD1UN -16 (x2)
232715 -17 1377  SM5ZAD G1XOW -03 (x2)
233245 -14 1682  SM5ZAD EW8CW -10 (x2)

20m

UTC    dB Audio  Message
184615 -14 1045  SM5ZAD PA7TT JO33
190130 -22 1081  LA7DMA SM5ZAD R-09
190700 -18 1030  GM5GHA SM5ZAD JO79 (x4)
192915 -21 1921  SM5ZAD M6TVD RR73
193830  -9 1122  DL3MIB SM5ZAD JO79
194030  -9  565  OK4SD SM5ZAD JO79
194045  +3  560  SM5ZAD OK4SD -15 (x2)
194130  -9  564  OK4SD SM5ZAD 73
194200  -7  565  BI4JJO SM5ZAD -14
194345 -15 1243  SM5ZAD DL7BG RR73
194430 -18 1670  R8CEG SM5ZAD JO79

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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