SM5NBE — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Sweden Most frequent locator attributed to this token: JP80

Receiver-side FT8 activity involving SM5NBE, decoded by SO8OO in southeastern Poland. 139 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-07 and 2026-08-27.

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 139 FT8 messages attributed to SM5NBE as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (62%), followed by 20 m (37%) and 40 m (1%). Several six-hour UTC windows tied for the largest share (55%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (68%); the estimated median was -2 dB.

Overview

139

Messages attributed

UTC dates decoded

Active 15-min windows

-2 dB

Estimated median S/N

Bands

80m · 86 40m · 1 20m · 52

First attributed message: 2026-07-07
Last attributed message: 2026-08-27 11:07 UTC

Observed FT8 message patterns

Attributed sample: 139 messages
Active dates: 5 UTC dates
Estimated median S/N: -2 dB
Estimated 10th-90th percentile: -16 to +6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 29, strong (≥ -8 dB) 95.

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 SM5NBE in decoded directed-looking exchanges:

GJ0KYZ · Jersey CT1BFP · Portugal DB1SN · Fed. Rep. of Germany DB9LG · Fed. Rep. of Germany EA1IOK · Spain ES6DO · Estonia F1PSX · France F5RRS · France G4UJS · England IU5RTR · Italy ON4JMV · Belgium PC2J · 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 SM5NBE

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: JP80 · 78 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,212 km (approx.)
Last such locator decoded: 2026-08-27 11:07 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	SM5NBE S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-27 11:07	20m	- / -	TA3NK	+3 / -	7	Partial capture
08-27 10:48	20m	-6 / -	UW5EFR	- / -13	2	✓ Closing fragment
08-27 10:41	20m	-14 / -	YT1VDA	- / -15	2	Partial capture
08-27 10:41	20m	-14 / -	PD0WL	-3 / -16	7	Partial capture
08-27 10:36	20m	-11 / -	9A5E	- / -	2	Partial capture
08-27 10:34	20m	-2 / -	PD0WL	- / -12	2	Partial capture
08-27 10:33	20m	- / -8	2E0UMF	-24 / -	2	Partial capture
08-27 10:32	20m	-5 / -10	EA1IOK	-6 / -15	7	✓ Full exchange observed
08-18 12:13	20m	- / -20	RU3QR	-11 / -	12	Partial capture
08-18 12:12	20m	- / -	PE9JAN	-14 / -	3	Partial capture
08-12 08:37	20m	- / -	DH2RL	-9 / -	5	Partial capture
08-12 08:33	20m	- / -	OK7TB	-9 / -	4	Partial capture
08-10 18:29	80m	- / -	UR5RBP	-13 / -	6	Partial capture
08-10 18:27	80m	- / -2	PB0F	-16 / -	2	Partial capture
08-10 18:26	80m	- / -13	R2SN	+4 / -	6	Partial capture
08-10 18:23	80m	-11 / -13	SQ4PKO	+2 / -11	9	✓ Full exchange observed
08-10 18:22	80m	- / -	SP2IHI	-15 / -	3	Partial capture
08-10 18:20	80m	- / -4	DO1ID	-3 / -	3	✓ Closing fragment
08-10 18:20	80m	- / -	SP7FM	+5 / -	3	Partial capture
08-10 18:20	80m	- / -	UR5SD	+14 / -	3	Partial capture
08-10 18:11	40m	- / -11	DL3JHK	-14 / -	3	✓ Closing fragment
08-09 19:01	40m	- / -	YO8CRU	-9 / -	2	Partial capture
08-09 18:49	40m	- / -	DL5MKR	-18 / -	2	✓ Closing fragment
08-09 13:31	20m	- / -	UT2UCA	-12 / -	3	Partial capture
08-09 13:13	20m	- / -	DB9LG	-9 / -	2	✓ Closing fragment
08-09 13:04	20m	- / -	DH2RL	-11 / -	3	Partial capture
08-09 12:52	10m	- / -14	GJ0KYZ	-21 / -	4	✓ Closing fragment
08-08 10:22	20m	- / -	F5MYH	-14 / -	8	Partial capture
08-08 10:15	20m	- / +5	F1PSX	-13 / -	4	✓ Closing fragment
08-08 10:11	20m	- / -16	F1PBZ	-11 / -	2	Partial capture
08-07 18:03	20m	- / -	RZ4FWA	-19 / -	2	Partial capture
08-06 20:59	80m	- / -15	DO5OT	-1 / -	3	✓ Closing fragment
08-06 20:49	80m	- / -20	ON5MEV	-19 / -	2	Partial capture
08-06 20:47	20m	- / -	M9KJY	-10 / -	2	Partial capture
08-06 20:47	80m	- / -21	GB8VJ	-20 / -	2	Partial capture
08-06 20:46	80m	- / -20	SP9WAZ	0 / -	2	Partial capture
08-06 19:31	20m	- / -	PD3LKN	-18 / -	3	Partial capture
08-06 19:26	20m	- / -7	UT1EF	-11 / -	3	Partial capture
08-06 19:20	20m	- / -12	CT1BFP	-11 / -	3	✓ Closing fragment
07-09 22:49	80m	- / -11	2E0GKF	-14 / -	2	Partial capture
07-09 22:49	80m	- / -	DO1SWC	-4 / -	11	Partial capture
07-09 22:48	80m	- / -	DO5HOK	+7 / -	5	Partial capture
07-09 22:48	80m	- / -	SP2DW	+9 / -	3	Partial capture
07-09 22:47	80m	+2 / -17	SP6FME	+16 / -2	5	✓ Full exchange observed
07-09 10:47	20m	-13 / -	M0EFI/P	- / -19	5	Partial capture
07-09 10:46	20m	- / -	DL1R	-6 / -	7	Partial capture
07-09 10:45	20m	- / -10	F4FSY	-6 / -	3	Partial capture
07-09 10:41	20m	- / -	PD1ADA	-17 / -	3	Partial capture
07-09 10:41	20m	-15 / -	G3RLX	- / -5	4	Partial capture
07-09 10:36	20m	-4 / -	ES6DO	- / -11	4	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
104600  -7 1878  SM5NBE PD0WL 73
104645  -7 1830  CQ SM5NBE JP80 (x3)
104845  -6 1556  UW5EFR SM5NBE -13 (x2)
110645  +0 1198  CQ SM5NBE JP80
110700  -1 1199  SM5NBE TA3NK KM39
110715  +4 1197  CQ SM5NBE JP80
110730  +3 1199  SM5NBE TA3NK KM39 (x6)

80m

UTC    dB Audio  Message
182700 -17 1078  SM5NBE PB0F -02
182715 -16 1072  CQ SM5NBE JP80
182730  +2  957  SM5NBE R2SN -14
182745 -16 1067  CQ SM5NBE JP80
182800  +4  957  SM5NBE R2SN -11
182800 -16 1079  SM5NBE PB0F -02
182815 -19 1060  CQ SM5NBE JP80
182830  +2  957  SM5NBE R2SN -12
182900 -13 1887  SM5NBE UR5RBP KO51
182900  +1  957  SM5NBE R2SN -12
182930 -17 1884  SM5NBE UR5RBP KO51 (x5)

40m

UTC    dB Audio  Message
184915 -22 1589  SM5NBE DL5MKR JO60 (x2)
190130  -8 1421  SM5NBE YO8CRU KN36 (x2)
190215 -13  665  YL3GQ SM5NBE JP80
180930 -18 1366  SM5NBE RX3ASQ KO95
181030 -13 1353  SM5NBE R3XBS KO74
181030 -10  708  SM5NBE DL2VN JO51
181130 -13 1140  SM5NBE DL3JHK JO62 (x3)

10m

UTC    dB Audio  Message
110430  -9 1092  SM5NBE DL1MKW JO40
115115 -10  523  SM5NBE F5CUN JN26
125230 -22 1477  SM5NBE GJ0KYZ -14 (x4)

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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