SM5IZS — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Sweden Most frequent locator attributed to this token: JO79

Receiver-side FT8 activity involving SM5IZS, decoded by SO8OO in southeastern Poland. 216 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 31 UTC dates in the available aggregate history. Observed between 2026-06-12 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 216 FT8 messages attributed to SM5IZS as the transmitting token by decoded message structure across 31 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (48%), followed by 20 m (28%) and 40 m (15%). Most decodes (83%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

216

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 103 40m · 33 20m · 61 10m · 19

First attributed message: 2026-06-12
Last attributed message: 2026-09-20 20:05 UTC

Observed FT8 message patterns

Attributed sample: 216 messages
Active dates: 31 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -21 to +4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 54, moderate (-15 to -9 dB) 55, strong (≥ -8 dB) 107.

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 SM5IZS in decoded directed-looking exchanges:

CE2SV · Chile DK3TA · Fed. Rep. of Germany DO1NJN · Fed. Rep. of Germany EA1AJT · Spain F4BYF · France IK1MJK/P · Italy 9A3K · Croatia DL7UMG · Fed. Rep. of Germany EA3FYO · Spain KH6DC · Hawaii KJ6GHN · United States LX1NO · Luxembourg

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 SM5IZS

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 · 109 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,148 km (approx.)
Last such locator decoded: 2026-09-20 20:04 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	SM5IZS S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 20:04	80m	+14 / -	SK5AD	-10 / -5	4	✓ Full exchange observed
09-20 19:55	80m	-4 / -	RI1FJZ	- / -14	4	✓ Closing fragment
09-20 18:45	80m	+3 / -	RI1FJZ	- / -	6	Partial capture
09-17 18:04	80m	-5 / -	LA8MGA	- / -10	4	Partial capture
09-17 18:02	80m	0 / -	UN7LAN	- / -	2	Partial capture
09-03 19:35	80m	+2 / -	DO8JB	- / -7	2	✓ Closing fragment
09-03 19:32	80m	+4 / -	CT2KNA	- / -21	2	Partial capture
09-03 19:18	80m	0 / -	SQ100PKP	- / -12	2	Partial capture
09-03 17:20	40m	-6 / -10	RN6MA	+2 / -4	4	✓ Full exchange observed
09-02 20:04	80m	-11 / -	RI1FJL	- / -	6	Partial capture
09-02 19:28	80m	-7 / -	RI1FJL	- / -	17	Partial capture
09-02 19:24	80m	-9 / -	RI1FJL	- / -	2	Partial capture
09-02 19:19	80m	-4 / -	RI1FJL	- / -17	3	Partial capture
09-01 18:55	40m	-9 / +7	G6MTI	-9 / -5	6	✓ Full exchange observed
09-01 18:55	40m	-6 / +1	SN1A	-2 / -9	3	Partial capture
08-31 20:13	80m	- / -12	DL5BTE	+1 / -	3	Partial capture
08-31 20:11	80m	0 / -11	YO4NT	+2 / -4	4	✓ Full exchange observed
08-31 20:11	80m	+6 / -	DK7TX	+3 / -9	3	✓ Closing observed
08-30 19:03	80m	- / -10	ON5RZ	-4 / -	4	✓ Closing fragment
08-30 19:00	80m	-1 / -	9A9N	- / -13	3	✓ Closing fragment
08-30 18:52	80m	+5 / -10	F4JZX	-5 / -13	4	✓ Full exchange observed
08-30 18:50	80m	+6 / -	IK3/UY7LA	- / -17	2	Partial capture
08-30 18:48	80m	-2 / -	UN7LAN	- / -	4	Partial capture
08-28 20:23	40m	-10 / -	<...>	- / -11	2	Partial capture
08-23 19:39	80m	+3 / +8	RA2FU	-10 / -4	5	✓ Full exchange observed
08-23 18:52	40m	-10 / -	4X5JK	- / -	2	Partial capture
08-23 18:43	40m	-11 / -	EI8GS	-9 / -4	3	✓ Closing observed
08-17 19:56	40m	-16 / -	EI4JCB	- / -9	3	✓ Closing fragment
08-17 19:54	40m	-17 / -	SV3AUW	-22 / -11	4	✓ Closing observed
08-17 19:51	40m	-17 / -	F4NGO	- / -8	3	✓ Closing fragment
08-15 20:06	80m	-1 / -	SK6MA/LH	- / -	2	Partial capture
08-15 19:44	40m	- / -4	RY3F	-4 / -	2	Partial capture
08-09 20:11	40m	- / -3	DL9KM	-16 / -	2	Partial capture
08-09 20:08	40m	-24 / -2	DL5MKR	-16 / 0	5	Partial capture
08-09 20:03	80m	+2 / -	OD5SB	-18 / -17	4	✓ Closing observed
08-09 20:01	80m	-2 / -10	DL5KMR	-11 / -13	8	✓ Full exchange observed
08-09 20:01	80m	0 / -	JE6WOQ	-14 / -16	5	✓ Closing observed
08-09 19:57	80m	+2 / -8	DL8TV	+8 / +1	6	✓ Full exchange observed
08-09 19:57	80m	+3 / -	ON6CQ	-20 / -13	6	✓ Closing observed
08-09 19:57	80m	- / -5	PA0EBG	-18 / -	3	✓ Closing fragment
08-09 19:57	80m	+3 / -1	SP2KW	+1 / -6	5	✓ Full exchange observed
08-09 19:49	80m	+8 / -	<...>	- / +3	2	Partial capture
08-07 18:53	20m	-23 / -	KJ6GHN	- / -13	2	✓ Closing fragment
08-05 07:11	40m	- / +2	OE4BHF	-21 / -	2	✓ Closing fragment
08-04 18:11	80m	-2 / -16	R3HH	-6 / -3	6	✓ Full exchange observed
08-04 18:09	80m	-9 / -8	US1VAA	+6 / -2	2	Partial capture
07-31 17:24	40m	-24 / -	UB3ADO/P	- / -11	2	✓ Closing fragment
07-31 06:50	20m	- / -	DB1IUA	-14 / -	2	Partial capture
07-31 06:48	20m	- / -	OD5KU	-4 / -	4	Partial capture
07-31 06:37	20m	- / +1	R5AV	+8 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
184545  +0 1907  RI1FJZ SM5IZS JO79 (x10)
200430 +11 1766  SK5AD SM5IZS JO79
200445 -10 2048  SM5IZS SK5AD +24
200500 +16 1766  SK5AD SM5IZS R-05
200515 -10 2049  SM5IZS SK5AD RR73
200545  -9 1843  SM5IZS SV1DKR KM18

40m

UTC    dB Audio  Message
185515  -3 1935  SM5IZS SN1A JO73
185515  -7  939  SM5IZS DL4RY JO30
185530  -6 2367  SN1A SM5IZS -09
185545  -1 1935  SM5IZS SN1A R+01
185545 -11  940  SM5IZS G6MTI IO81 (x2)
185630 -11 2367  G6MTI SM5IZS -05
185645  -8  940  SM5IZS G6MTI R+07
185700  -7 2367  G6MTI SM5IZS RR73 (x2)
172030 -15 1928  CQ SM5IZS JO79                        a1
172045  -2 1927  SM5IZS RN6MA -10
172100  -6 1927  RN6MA SM5IZS R-04
172115  +5 1927  SM5IZS RN6MA RR73
172130  -5 1928  RN6MA SM5IZS 73

20m

UTC    dB Audio  Message
064815  -8 2232  SM5IZS DB1IUA JO40
064845  -5 2629  SM5IZS OD5KU KM73
064845 -12  771  SM5IZS DK6WS -08
064915  -5 2630  SM5IZS OD5KU KM73
064915  -8 2274  SM5IZS F4LNM JN09
064945  -1 2463  SM5IZS OD5KU KM73 (x2)
065045 -14 2269  SM5IZS DB1IUA JO40 (x2)
072100 -14 2497  IN3IZQ SM5IZS JO79
104545  +0 2771  SM5IZS F1PBZ -05
185330 -23 1820  KJ6GHN SM5IZS R-13 (x2)
084730  -7  662  KH6XX SM5IZS JO79
185345 -12 2508  TN8GD SM5IZS 73

10m

UTC    dB Audio  Message
192700  -4 2183  SM5IZS IK1MJK/P R-04 (x2)
193015 -15 2044  SM5IZS DO1NJN JO30 (x2)
193900 -14 2184  SM5IZS DK3TA R+00 (x2)
183630  -6 2326  TM2WWA SM5IZS JO79
091615 -10 1008  SM5IZS F4LNM JN09 (x2)
191400  -5 2415  SM5IZS CE2SV -15 (x2)
161415 -10  492  SM5IZS IK4LZH JN54
161445 -20 1457  SM5IZS IW1PPB R-19
161545  -4  492  SM5IZS IK4LZH JN54
081430 -12  833  SM5IZS F4BYF RR73

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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