SM4ONW — 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: JP70

Receiver-side FT8 activity involving SM4ONW, decoded by SO8OO in southeastern Poland. 546 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 40 UTC dates in the available aggregate history. Observed between 2026-07-09 and 2026-11-04.

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 546 FT8 messages attributed to SM4ONW as the transmitting token by decoded message structure across 40 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (64%), followed by 40 m (32%) and 80 m (3%). Most decodes (79%) fell within the six-hour window 15:00-21:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11.7 dB.

Overview

546

Messages attributed

UTC dates decoded

Active 15-min windows

-11.7 dB

Estimated median S/N

Bands

160m · 6 80m · 15 60m · 348 40m · 174 20m · 2 10m · 1

First attributed message: 2026-07-09
Last attributed message: 2026-11-04 17:26 UTC

Observed FT8 message patterns

Attributed sample: 546 messages
Active dates: 40 UTC dates
Estimated median S/N: -11.7 dB
Estimated 10th-90th percentile: -18 to -4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 130, moderate (-15 to -9 dB) 243, strong (≥ -8 dB) 173.

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 SM4ONW in decoded directed-looking exchanges:

EX7CQ · Kyrgyzstan ×2 OH3MB · Finland ×2 DK3RV · Fed. Rep. of Germany ×2 IZ8EOB · Italy ×2 CT1EEX · Portugal OD5ZZ · Lebanon DK0NPB · Fed. Rep. of Germany OM2WW · Slovak Republic 9A7BB · Croatia A99AA · Bahrain BG3NQT · China BG4UVR · China

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 SM4ONW

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: JP70 · 225 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,249 km (approx.)
Last such locator decoded: 2026-11-04 17:26 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	SM4ONW S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-04 17:24	60m	-7 / -10	ON8LX	-10 / -3	5	✓ Full exchange observed
11-01 18:59	80m	-2 / -	D2UY	- / -15	2	✓ Closing fragment
10-31 17:16	60m	-13 / +2	OE3PKU	-1 / +7	5	✓ Full exchange observed
10-31 17:15	60m	-12 / -1	DL5ZG	-11 / +10	5	✓ Full exchange observed
10-31 17:13	60m	-10 / 0	DG1RMY	-18 / 0	7	✓ Full exchange observed
10-31 17:13	60m	-12 / -13	DG7AK	-8 / -7	6	✓ Full exchange observed
10-31 17:12	60m	-9 / +1	F1PBZ	-6 / -5	4	✓ Full exchange observed
10-31 12:16	10m	- / -11	OD5ZZ	-6 / -	2	✓ Closing fragment
10-30 17:47	40m	- / -2	TA2LE	-13 / -	2	Partial capture
10-30 17:44	40m	-4 / -	EX7CQ	- / -	2	✓ Closing fragment
10-28 19:02	60m	-9 / -	ER3ZW	- / -2	3	✓ Closing fragment
10-28 18:50	80m	- / -	DO9SAM	+8 / -	2	Partial capture
10-28 18:48	80m	- / -2	UA4FKT	+2 / -	3	Partial capture
10-28 18:43	60m	-8 / -8	SV1SUO	-6 / 0	5	✓ Full exchange observed
10-27 17:35	80m	-22 / -	XX9TXN	- / -	5	Partial capture
10-27 17:33	60m	- / -2	DK8NX	-3 / -	3	Partial capture
10-27 17:30	60m	-10 / -1	DK6WH	-9 / -1	6	✓ Full exchange observed
10-27 17:29	60m	-13 / -	PA3ADE	-22 / -2	4	✓ Closing observed
10-27 17:26	60m	-10 / -5	IK0BAL	-5 / -7	7	✓ Full exchange observed
10-27 17:26	60m	-10 / -4	OE9RWH	-6 / +1	6	✓ Full exchange observed
10-27 17:25	60m	-14 / +8	ES2AJ	+2 / -	5	✓ Full exchange observed
10-27 17:23	60m	-12 / +3	LZ26IPA	-12 / +2	3	Partial capture
10-26 07:00	60m	-16 / 0	DH9DR	-6 / -	4	✓ Full exchange observed
10-26 06:57	60m	-10 / -7	OE100OEVSV	-15 / -13	3	Partial capture
10-26 06:55	60m	-15 / -	G3SHK	-8 / -	4	✓ Closing observed
10-25 17:04	60m	-8 / 0	OE8PIT	+14 / -25	5	✓ Full exchange observed
10-25 17:03	60m	-5 / -	IN3OWY	- / -9	2	✓ Closing fragment
10-25 17:00	60m	-9 / -9	PE1MSU	-4 / -	5	✓ Full exchange observed
10-24 06:36	60m	-9 / -	LZ936BA	- / -	8	Partial capture
10-23 16:25	60m	-8 / -	IK8OAM	- / -12	2	Partial capture
10-23 16:23	60m	-2 / -	OE9DAI	-13 / -5	3	✓ Closing observed
10-23 16:23	60m	-7 / -	DF9JL	-13 / +1	5	✓ Full exchange observed
10-23 16:21	60m	-11 / -	YL3FW	-17 / -4	3	✓ Closing observed
10-23 16:20	60m	-8 / -	8S2A	- / +8	3	✓ Closing fragment
10-23 13:45	10m	- / -4	CT1EEX	-6 / -	2	✓ Closing fragment
10-23 06:46	60m	-18 / -	OH3MB	-15 / -	5	✓ Full exchange observed
10-23 06:44	60m	-12 / +3	SN5N	0 / -	4	✓ Closing observed
10-23 06:44	60m	-14 / -	HI3K	- / -	2	Partial capture
10-22 06:50	60m	-13 / -	FK8HC	- / -	56	Partial capture
10-21 17:29	60m	-3 / -	DG2LBH	- / -7	2	✓ Closing fragment
10-21 17:28	60m	-6 / -	DL8UD	+5 / -	4	✓ Full exchange observed
10-21 17:25	60m	-6 / +7	DC2MA	-20 / -11	4	✓ Full exchange observed
10-21 17:25	60m	-1 / +8	SP2EWQ	-5 / -	5	✓ Full exchange observed
10-21 06:46	60m	-15 / -	OZ1BGQ	- / -	2	✓ Closing fragment
10-21 06:45	60m	-14 / -	LA2FCA	- / -4	2	✓ Closing fragment
10-21 06:44	60m	-13 / +2	DL3FBI	-16 / -17	3	✓ Full exchange observed
10-21 06:42	60m	-4 / -	ZL2AGY	- / -	2	Partial capture
10-21 06:32	60m	-10 / -	ZL4OL	- / -25	6	✓ Closing fragment
10-21 06:29	60m	-16 / +5	DL1UDO	-2 / +10	5	✓ Full exchange observed
10-21 06:27	60m	-12 / -	EA8AE	- / +3	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
171615 -12 1802  DL5ZG SM4ONW RR73
171630  +0 1883  SM4ONW OE3PKU JN87
171630 -10 2015  SM4ONW DL5ZG 73
171645 -13 1802  OE3PKU SM4ONW +07
171700  +1 1883  SM4ONW OE3PKU R+02
171715 -13 1802  OE3PKU SM4ONW RR73
171730  -5 1883  SM4ONW OE3PKU 73
171745 -13 1802  9A60CBM SM4ONW -20
172430  -7 1502  ON8LX SM4ONW JP70
172445  -9 1889  SM4ONW ON8LX -10
172500  -5 1502  ON8LX SM4ONW R-03
172515 -11 1889  SM4ONW ON8LX RR73
172530  -8 1502  ON8LX SM4ONW 73
172600  -5 1502  CQ SM4ONW JP70 (x2)

10m

UTC    dB Audio  Message
134515  -5 1425  SM4ONW CT1EEX -04 (x2)
121630  -7 1741  SM4ONW OD5ZZ -11 (x2)
114645 -23 1564  9X5KM SM4ONW JP70

40m

UTC    dB Audio  Message
183800 -12 1855  SM4ONW SV1DKR KM18
183800  -5 1246  SM4ONW 9A7BB 73
183815 -17 1590  BA6IM SM4ONW -13
183830 -11 1855  SM4ONW SV1DKR KM18
183945 -11 1590  BG5JGG SM4ONW -08 (x2)
184045 -15 1590  CQ SM4ONW JP70
184115 -14 1590  DL2AOM SM4ONW -19
184145 -12 1590  BG4UVR SM4ONW -17 (x2)
174445  -5  768  EX7CQ SM4ONW JP70 (x2)
174700 -12 2070  SM4ONW TA2LE -02 (x2)
073045 -24 1507  OA4ENG SM4ONW JP70

80m

UTC    dB Audio  Message
182300 -12 1554  TA4SSK SM4ONW JP70 (x2)
162745 -15 1454  OD5ZZ SM4ONW JP70
173545 -18 1455  XX9TXN SM4ONW JP70 (x5)
184830  +1 1465  SM4ONW UA4FKT LO23 (x3)
185030  +9 1464  SM4ONW DO9SAM JO61 (x2)
185930  -3 1570  D2UY SM4ONW R-15 (x2)

160m

UTC    dB Audio  Message
175945 -18 1803  SM4ONW DK0NPB -15
180000 -23 1553  DK0NPB SM4ONW R+03
180015 -11 1803  SM4ONW DK0NPB RR73
180030 -21 1553  DK0NPB SM4ONW 73
180100 -21 1553  OM2WW SM4ONW JP70
180145  +5 1156  SM4ONW OM2WW JN88
180200 -23 1553  OM2WW SM4ONW +01
180215  +7 1156  SM4ONW OM2WW R-13 (x2)
180330 -19 1553  CQ SM4ONW JP70
180445  -8 2272  SM4ONW DC0GL JO52 (x2)
173230 -24 1553  UA8J SM4ONW JP70

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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