SM5UYV — 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: JO78

Receiver-side FT8 activity involving SM5UYV, decoded by SO8OO in southeastern Poland. 279 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, across 6 UTC dates in the available aggregate history. Observed between 2026-09-18 and 2026-10-31.

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 279 FT8 messages attributed to SM5UYV as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (56%), followed by 160 m (24%) and 40 m (20%). Several six-hour UTC windows tied for the largest share (93%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

279

Messages attributed

UTC dates decoded

Active 15-min windows

-10 dB

Estimated median S/N

Bands

160m · 66 80m · 157 40m · 56

First attributed message: 2026-09-18
Last attributed message: 2026-10-31 20:52 UTC

Observed FT8 message patterns

Attributed sample: 279 messages
Active dates: 6 UTC dates
Estimated median S/N: -10 dB
Estimated 10th-90th percentile: -17 to -3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 48, moderate (-15 to -9 dB) 112, strong (≥ -8 dB) 119.

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 SM5UYV in decoded directed-looking exchanges:

EI4DQ · Ireland ×2 UR4LRG · Ukraine ×2 CS7CDZ · Portugal CT2HEX · Portugal EC5M · Spain 8S2A · Sweden DK7TX · Fed. Rep. of Germany DM9SD · Fed. Rep. of Germany E73S · Bosnia-Herzegovina G4IRN · England LA3BO · Norway LX1JX · 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 SM5UYV

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: JO78 · 167 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,048 km (approx.)
Last such locator decoded: 2026-10-31 20:49 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	SM5UYV S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-31 20:51	80m	-8 / -	TA7ARH	- / 0	2	✓ Closing fragment
10-31 20:43	80m	-9 / -11	IU3WOZ	-6 / -11	9	Partial capture
10-31 20:39	80m	-8 / -	SP9NVY	-5 / -	6	✓ Closing observed
10-31 20:37	80m	-6 / -4	G0HSP	+2 / 0	4	✓ Full exchange observed
10-31 20:27	160m	-8 / -9	OK1DXR	0 / -12	8	✓ Full exchange observed
10-31 20:26	160m	-4 / -7	G4IRN	+16 / +6	5	✓ Full exchange observed
10-31 20:22	160m	-12 / -13	E73S	+16 / +5	8	✓ Full exchange observed
10-31 20:19	160m	-19 / -8	MM0JTV	-18 / -15	4	Partial capture
10-31 20:19	160m	-21 / -12	OZ2LC	0 / -11	6	✓ Full exchange observed
10-31 20:18	160m	-20 / -24	EA2B	-18 / -	3	Partial capture
10-31 20:16	160m	-14 / -4	LX1JX	-2 / -	4	✓ Closing observed
10-31 20:13	160m	-19 / -14	OE8DDX	-4 / -14	4	Partial capture
10-31 20:12	160m	-15 / -14	RN3TT	+10 / +2	5	✓ Full exchange observed
10-31 20:10	160m	-17 / -13	IZ3VCN	-9 / +2	2	Partial capture
10-31 20:07	160m	-8 / -13	UR4LRG	+12 / +5	7	✓ Full exchange observed
10-31 19:50	80m	-4 / -	LA5VX	- / -5	3	✓ Closing fragment
10-31 19:37	80m	- / -9	G8KHF	-8 / -	3	✓ Closing fragment
10-31 19:33	80m	-12 / -2	F4PAN	+5 / -	9	✓ Closing observed
10-31 19:31	80m	-12 / -	M5WJF	- / -5	4	✓ Closing fragment
10-31 19:28	80m	-6 / -	SQ9DKS	- / -	3	Partial capture
10-31 19:27	80m	-10 / -	SM4UPU	- / +2	3	✓ Closing fragment
10-31 19:25	80m	-9 / -	ON6LR	- / -2	3	✓ Closing fragment
10-31 19:24	80m	-8 / -16	UR4LRG	0 / -1	4	✓ Full exchange observed
10-31 14:56	10m	- / -18	CT2HEX	0 / -	4	✓ Closing fragment
10-31 14:55	80m	- / -	DM5CF	+4 / -	2	Partial capture
10-31 14:51	80m	-10 / -	DG9EAL	-14 / -22	7	✓ Full exchange observed
10-29 21:38	80m	-8 / -	OD5ZZ	- / -	6	Partial capture
10-29 21:34	80m	-10 / -	F4CTJ	- / -	9	Partial capture
10-29 21:31	80m	-15 / -13	DA6DNA	-16 / -	5	✓ Closing observed
10-29 21:14	80m	-14 / -	SM7TZK	- / -1	4	✓ Closing fragment
10-29 21:09	80m	-9 / -	F4CTJ	- / -	4	Partial capture
10-29 21:01	80m	-11 / +3	DL1DCT	-6 / +2	4	✓ Full exchange observed
10-29 20:57	80m	-8 / -	HB0PA	- / -	3	Partial capture
10-29 20:50	80m	-12 / -10	DL6NDN	+4 / -	3	✓ Closing observed
10-29 20:48	80m	-2 / -7	OZ9FF	-2 / -	3	✓ Closing observed
10-29 20:27	80m	-9 / -	ES0MVM	- / -	5	Partial capture
10-29 20:26	80m	- / -	DO1ID	+6 / -	3	Partial capture
10-29 20:20	80m	- / -5	EO210WLP	+3 / -	5	Partial capture
10-29 20:20	80m	-6 / -	SM/R1CR	- / -4	2	Partial capture
10-29 20:14	80m	-2 / +2	SP5MXZ	+8 / -4	5	✓ Full exchange observed
10-29 20:12	80m	- / -6	SQ4INW	+12 / -	2	✓ Closing fragment
10-29 18:57	160m	-17 / -	RW9QA	- / -	3	Partial capture
10-29 18:52	160m	-12 / -17	R2FC	+7 / -1	5	✓ Full exchange observed
10-29 18:51	160m	-17 / +4	S57AM	0 / -	3	✓ Closing observed
10-29 18:48	160m	-14 / -	EI4DQ	-11 / -14	5	✓ Closing observed
10-29 18:47	160m	-8 / -1	SP3EIE	-2 / -7	5	✓ Full exchange observed
10-29 18:45	160m	-11 / 0	OZ2LIN	0 / -1	5	✓ Full exchange observed
10-29 18:42	160m	-20 / -	R8DX	- / -	5	Partial capture
10-29 18:40	160m	-16 / -12	YU7JDE	+5 / -10	4	✓ Full exchange observed
10-29 18:37	160m	- / -1	DM9SD	-4 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
204030  -6 1401  SP9NVY SM5UYV JO78 (x2)
204145  -5 1690  SM5UYV SP9NVY RR73
204300  -5 1401  IU3WOZ SM5UYV JO78 (x4)
204515  -6 1934  SM5UYV IU3WOZ -11
204530  -9 1400  IU3WOZ SM5UYV R-11
204545  -5 1934  SM5UYV IU3WOZ -11
204600 -11 1400  IU3WOZ SM5UYV R-11 (x2)
204900 -11 1401  TA7ARH SM5UYV JO78 (x3)

160m

UTC    dB Audio  Message
202500 +18 2808  SM5UYV E73S RR73
202515  -8 1402  E73S SM5UYV 73
202600  -8 1402  G4IRN SM5UYV JO78
202615 +15  343  SM5UYV G4IRN -07
202630  -3 1402  G4IRN SM5UYV R+06
202645 +16  342  SM5UYV G4IRN RR73
202700  -1 1402  G4IRN SM5UYV 73
202715  -2 1301  SM5UYV OK1DXR JO60 (x4)
202900 -10 1402  OK1DXR SM5UYV -12
202915  -2 1301  SM5UYV OK1DXR R-09
202930  -7 1402  OK1DXR SM5UYV RR73
202945  +0 1301  SM5UYV OK1DXR 73

10m

UTC    dB Audio  Message
091730 -23 1729  SM5UYV RR73; DM2GM <...> +00
171615  -7 1097  SM5UYV CS7CDZ -05 (x2)
171745  -2  952  SM5UYV EC5M -02 (x2)
145645  +0 2989  SM5UYV CT2HEX -18 (x4)

40m

UTC    dB Audio  Message
195700  +1  731  SM5UYV F4LHL -11 (x2)
200015 -16 1429  TJ1GD SM5UYV JO78 (x3)
200645 -16 1428  OZ1KEF SM5UYV JO78
200745 -18 1428  OH9FTW SM5UYV JO78
200800  +1 2809  SM5UYV OH9FTW +09
200815 -14 1428  OH9FTW SM5UYV R+22
200830  +0 2809  SM5UYV OH9FTW RR73
200845 -16 1428  OH9FTW SM5UYV 73
201015 -14 1428  M3ZZF SM5UYV JO78
203530 +14 2933  SM5UYV G4IFX -02 (x2)
193445  -7  513  SM5UYV M7FSE -18

20m

UTC    dB Audio  Message
160600  -6 2216  SM5UYV UN7IV R-16
160630  -7 2040  SM5UYV BG7BVI OL66 (x3)
145145  +6 1455  SM5UYV G4UJS -04 (x2)
145415  -2 1455  SM5UYV M0LAD JO02

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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