SM1ALH — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Sweden Most frequent locator attributed to this token: JO97

Receiver-side FT8 activity involving SM1ALH, decoded by SO8OO in southeastern Poland. 72 FT8 messages attributed to this token as transmitter, on 160m, 60m, 40m, 20m, across 8 UTC dates in the available aggregate history. Observed between 2026-06-10 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 72 FT8 messages attributed to SM1ALH as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (39%), followed by 160 m (32%) and 60 m (18%). Several six-hour UTC windows tied for the largest share (74%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (75%); the estimated median was -2 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-2 dB

Estimated median S/N

Bands

160m · 23 60m · 13 40m · 28 20m · 8

First attributed message: 2026-06-10
Last attributed message: 2026-09-20 17:35 UTC

Observed FT8 message patterns

Attributed sample: 72 messages
Active dates: 8 UTC dates
Estimated median S/N: -2 dB
Estimated 10th-90th percentile: -14 to +9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 14, strong (≥ -8 dB) 54.

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 SM1ALH in decoded directed-looking exchanges:

TN8GD · Republic of the Congo BG4UVR · China GJ0KYZ · Jersey LZ1JZ · Bulgaria

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 SM1ALH

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: JO97 · 57 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 861 km (approx.)
Last such locator decoded: 2026-09-20 17:34 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	SM1ALH S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 17:33	160m	-2 / -	RI1FJZ	- / -17	5	Partial capture
09-16 19:42	160m	-14 / -	RI1FJZ	- / -	18	Partial capture
09-15 19:54	40m	- / -	ON5RZ	+6 / -	6	Partial capture
09-15 19:53	40m	-2 / -	BG0FQU	- / -8	2	Partial capture
09-15 19:53	40m	- / -	DD8HG	-9 / -	7	Partial capture
09-15 19:53	40m	- / -	UA3AKO	+8 / -	6	Partial capture
09-15 19:52	40m	+1 / -	UN7PPV	- / -2	2	Partial capture
09-15 19:52	40m	- / -	DJ0MAB	+2 / -	2	Partial capture
09-15 19:50	40m	+4 / -	BG4UVR	- / -2	2	✓ Closing fragment
09-15 19:50	40m	- / -	DK8HC	-6 / -	4	Partial capture
09-15 19:50	40m	- / +10	IV3JRW	+1 / -	3	Partial capture
09-15 19:49	40m	+4 / 0	GJ0KYZ	-2 / -	3	✓ Closing observed
09-15 19:43	40m	+5 / -	RI1FJZ	- / -	8	Partial capture
09-08 06:18	60m	+5 / -	ZL4OL	- / -	6	Partial capture
09-08 06:13	60m	+12 / -	F6JON/QRP	- / -	2	Partial capture
09-08 06:12	60m	0 / -	F5OYA/P	- / -	2	Partial capture
09-01 19:55	40m	- / -	PD0LBY	-10 / -	3	Partial capture
09-01 19:52	40m	+7 / -	RI1FJL	- / -19	4	Partial capture
09-01 17:26	40m	-3 / -	RI1FJL	- / -	6	Partial capture
08-10 21:05	60m	-2 / -4	LZ1JZ	-2 / -3	4	✓ Full exchange observed
08-10 07:24	20m	+4 / -	TT1GD	- / -12	2	Partial capture
08-10 07:22	20m	+1 / -	TN8GD	- / -14	3	✓ Closing fragment
06-29 06:26	20m	-4 / -	KH2SR	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
194715 -13 1843  RI1FJZ SM1ALH JO97 (x15)

40m

UTC    dB Audio  Message
195400  -6 2716  SM1ALH DD8HG JO53
195415  -1 2232  BG0FQU SM1ALH R-08
195430  +6 2612  SM1ALH UA3AKO KO85
195430  +5 2660  SM1ALH ON5RZ JO21
195430  -8 2716  SM1ALH DD8HG JO53
195500 +11 2612  SM1ALH UA3AKO KO85
195500  +4 2660  SM1ALH ON5RZ JO21
195500  -7 2716  SM1ALH DD8HG JO53
195530  +8 2612  SM1ALH UA3AKO KO85
195530  +5 2660  SM1ALH ON5RZ JO21
195530  -8 2716  SM1ALH DD8HG JO53
195600  +7 2660  SM1ALH ON5RZ JO21 (x2)
195700 -13 2716  SM1ALH DD8HG JO53 (x2)

60m

UTC    dB Audio  Message
210545  -3 2218  LZ1JZ SM1ALH JO97
210600  -1 2218  SM1ALH LZ1JZ -04
210615  -2 2218  LZ1JZ SM1ALH R-03
210630  -2 2218  SM1ALH LZ1JZ RR73
061215  +4  637  F5OYA/P SM1ALH JO97 (x2)
061315 +12  840  F6JON/QRP SM1ALH JO97 (x2)
061445  +9  914  <...> SM1ALH R-15
061830  +7  444  ZL4OL SM1ALH JO97 (x6)

20m

UTC    dB Audio  Message
062645  -3 2587  KH2SR SM1ALH JO97 (x2)
072215  +1 1644  TN8GD SM1ALH JO97 (x3)
072415  +4 1020  TT1GD SM1ALH JO97 (x2)

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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