SM7RHI — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Sweden Most frequent locator attributed to this token: JO75

Receiver-side FT8 activity involving SM7RHI, decoded by SO8OO in southeastern Poland. 1,419 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 35 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-07-30.

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 1,419 FT8 messages attributed to SM7RHI as the transmitting token by decoded message structure across 35 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (89%), followed by 20 m (11%) and 10 m (0%). Most decodes (72%) fell within the six-hour window 00:00-06:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (63%); the estimated median was -6 dB.

Overview

1,419

Messages attributed

UTC dates decoded

145

Active 15-min windows

-6 dB

Estimated median S/N

Bands

40m · 1,258 20m · 155 10m · 6

First attributed message: 2026-06-06
Last attributed message: 2026-07-30 02:31 UTC

Observed FT8 message patterns

Attributed sample: 1,419 messages
Active dates: 35 UTC dates
Estimated median S/N: -6 dB
Estimated 10th-90th percentile: -14 to +5.2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 74, moderate (-15 to -9 dB) 445, strong (≥ -8 dB) 900.

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 SM7RHI in decoded directed-looking exchanges:

F1IQH · France ×4 DG5PW · Fed. Rep. of Germany ×3 TA3NK · Asiatic Turkey ×2 W4DXM · United States ×2 HA3GX · Hungary ×2 DA0WWA · Fed. Rep. of Germany ×2 SQ3PMX · Poland M0IXY · England M7KSV · England DL3NGN · Fed. Rep. of Germany TJ1GD/P · Cameroon M7JTK · England

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 SM7RHI

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: JO75 · 974 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 769 km (approx.)
Last such locator decoded: 2026-07-30 02:31 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	SM7RHI S/N	Counterpart	Counterpart S/N	Msgs	Capture
07-30 02:30	40m	-6 / -	KE2CUR	- / -	2	✓ Closing fragment
07-30 02:24	40m	-8 / -13	DK5ON	-18 / -20	5	✓ Full exchange observed
07-30 02:21	40m	-11 / -	ES5MAH	- / -5	4	✓ Closing fragment
07-30 02:16	40m	-13 / -9	LA9GX	-5 / -5	3	Partial capture
07-29 03:44	40m	-1 / -	AA9JC	- / -14	2	Partial capture
07-29 03:42	40m	+2 / -	MW7RHR	-20 / -4	4	✓ Closing observed
07-29 03:41	40m	-11 / -	K4AKA	- / -7	3	✓ Closing fragment
07-28 23:33	40m	-2 / -	YY4GPM	- / -	2	Partial capture
07-28 23:31	40m	-6 / -	HI8J	- / -1	3	✓ Closing fragment
07-28 23:25	40m	-20 / -	YY4GPM	- / -	2	Partial capture
07-28 23:19	40m	-7 / +9	DK5WO	-14 / -	5	✓ Closing observed
07-28 23:18	40m	-6 / -	YB5QZ	- / +4	2	✓ Closing fragment
07-22 00:43	40m	- / +3	W4DXM	-12 / -	2	✓ Closing fragment
07-21 05:53	20m	-9 / -	K9STL	- / -8	2	Partial capture
07-21 05:49	20m	- / -	PE1BSF	-11 / -	3	Partial capture
07-21 05:48	20m	-4 / -	ZL4KX	- / -	2	Partial capture
07-21 05:41	40m	-10 / -	OE3HPT	- / -	2	✓ Closing fragment
07-20 00:54	40m	-5 / -	WD4AGF	- / -24	2	Partial capture
07-20 00:51	40m	-12 / -	KQ4TCL	- / -18	2	Partial capture
07-20 00:50	40m	-12 / -	OH1CIN	-19 / +7	3	✓ Closing observed
07-20 00:48	40m	-9 / -	F1IQH	- / -6	2	✓ Closing fragment
07-20 00:47	40m	-5 / -	D44AG	- / -	2	Partial capture
07-20 00:45	40m	-5 / -	HA3GX	- / -12	3	✓ Closing fragment
07-20 00:44	40m	-7 / -	AF4OZ	- / -10	2	✓ Closing fragment
07-20 00:41	40m	-10 / -	<...>	- / -	2	Partial capture
07-19 04:33	40m	-13 / -	SA0PAL	-12 / +2	2	✓ Closing observed
07-19 04:27	20m	- / -12	KB3VNG	-9 / -	2	✓ Closing fragment
07-16 17:43	40m	-11 / -	SP8FO	- / -	2	✓ Closing fragment
07-16 17:39	40m	-15 / -	DF5DY	- / -	2	✓ Closing fragment
07-16 17:38	40m	-12 / -	DL6CGN	-13 / -16	4	✓ Closing observed
07-16 17:33	40m	-14 / -	EI5HV	- / -17	2	✓ Closing fragment
07-16 17:31	40m	-4 / -13	DM3CH	-14 / -12	4	✓ Full exchange observed
07-16 17:29	40m	-1 / -	RM4N	- / +2	2	✓ Closing fragment
07-15 21:48	40m	-8 / -	TA3NK	- / -7	2	✓ Closing fragment
07-15 21:42	40m	-6 / -	SM5DXR	- / -10	3	✓ Closing fragment
07-15 21:36	40m	-11 / +7	IV3DSG	-5 / +10	5	✓ Full exchange observed
07-15 21:32	40m	-12 / +1	DL1IP	-5 / -	5	✓ Full exchange observed
07-15 16:12	40m	-4 / -	US5WAN	- / -4	2	✓ Closing fragment
07-15 16:06	40m	-12 / -	OH5CY	- / -	2	Partial capture
07-14 23:16	40m	- / -	IK4LZH	-2 / -	4	Partial capture
07-14 05:38	40m	-11 / -	DH8KAM	- / -7	3	✓ Closing fragment
07-14 05:36	40m	-13 / -	LB8VE	- / -2	3	✓ Closing fragment
07-14 05:02	40m	-14 / -	RK6OZ	- / -9	2	✓ Closing fragment
07-14 05:00	40m	-8 / -	EA3JEZ	- / -9	2	Partial capture
07-14 04:42	40m	-8 / -	SM0MWZ	- / -	2	✓ Closing fragment
07-14 01:57	40m	- / -16	W3DIY	-16 / -	3	✓ Closing fragment
07-13 22:57	40m	- / -	IK4LZH	-3 / -	4	Partial capture
07-13 22:49	40m	- / -	IK4LZH	-4 / -	3	Partial capture
07-12 22:35	40m	-2 / -	SP2KW	- / -21	2	✓ Closing fragment
07-12 22:31	40m	-8 / -	PT9TI	- / -18	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
022300 -12 2495  ES5MAH SM7RHI 73
022330  -8 2495  CQ SM7RHI JO75 (x2)
022415 -19 2244  SM7RHI DK5ON -13
022430  -7 2495  CQ SM7RHI JO75
022445 -16 2243  SM7RHI DK5ON -13
022530  -6 2495  DK5ON SM7RHI R-20
022545 -20 2244  SM7RHI DK5ON RR73
022600 -11 2495  DK5ON SM7RHI 73
022700 -12 2495  W5DMS SM7RHI -24
022915 -14  240  CQ SM7RHI JO75                        a1 (x2)
023045  -6  240  KE2CUR SM7RHI RR73 (x2)
023145 -14  240  KB6DAD SM7RHI JO75

20m

UTC    dB Audio  Message
040815 -20 2056  SM7RHI UG4Y 73
042700  -9  575  SM7RHI KB3VNG -12 (x2)
054730  -4 3034  CQ SM7RHI JO75
054830  -8 3035  ZL4KX SM7RHI JO75 (x2)
054915 -10 1067  SM7RHI PE1BSF JO32 (x2)
055030  -6 3035  NG7E SM7RHI JO75
055045 -14 1067  SM7RHI PE1BSF JO32
055200 -12 3035  CQ SM7RHI JO75
055300  -8 3035  K9STL SM7RHI JO75 (x2)
032045 -10  318  SM7RHI CT1BFP R-12
033330 -10  527  SM7RHI 7Z1GC -07

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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