JM3UGA — 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: Japan Most frequent locator attributed to this token: PM74

Receiver-side FT8 activity involving JM3UGA, decoded by SO8OO in southeastern Poland. 27 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-01 and 2026-09-21.

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 27 FT8 messages attributed to JM3UGA as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (56%), followed by 20 m (44%). Most decodes (74%) fell within the six-hour window 16:00-22:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's moderate S/N range (70%); the estimated median was -11 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

40m · 15 20m · 12

First attributed message: 2026-08-01
Last attributed message: 2026-09-21 21:00 UTC

Observed FT8 message patterns

Attributed sample: 27 messages
Active dates: 3 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -22 to -7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 19, strong (≥ -8 dB) 4.

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 JM3UGA in decoded directed-looking exchanges:

4Z5ML · Israel KC5OCH · United States NE9U · United States US5HL · Ukraine 7X2RF · Algeria 9A3EYA · Croatia 9A4ZM · Croatia DL3MIB · Fed. Rep. of Germany EX7CQ · Kyrgyzstan F1HFP · France HB9ELE · Switzerland RA3APK · European Russia

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 JM3UGA

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: PM74 · 7 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,565 km (approx.)
Last such locator decoded: 2026-09-21 21:00 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	JM3UGA S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-07 08:52	10m	- / -8	4Z5ML	0 / -	3	✓ Closing fragment
10-31 21:34	40m	- / -	CT7BRV	-13 / -	4	Partial capture
10-31 20:46	80m	- / -19	IS0JHQ	+9 / -	3	Partial capture
10-31 20:26	40m	- / -14	7X2RF	-4 / -	2	✓ Closing fragment
10-24 21:12	40m	- / -	RZ4FWA	-11 / -	3	Partial capture
10-24 21:11	40m	- / -5	DL3MIB	-3 / -	4	✓ Closing fragment
10-24 21:06	80m	- / -	YO4BXX	+4 / -	2	Partial capture
10-24 21:05	80m	- / -20	LY1DY	+14 / -	4	Partial capture
10-24 21:05	80m	- / -	RU3T	0 / -	2	Partial capture
10-24 21:02	80m	- / -	F5LQ	+2 / -	3	Partial capture
10-24 21:01	80m	- / -20	LY1DY	+13 / -	3	Partial capture
09-21 20:50	40m	- / -	PE1NPS	-8 / -	3	Partial capture
09-21 20:48	40m	- / -19	HB9ELE	+10 / -	8	✓ Closing fragment
09-21 20:47	40m	- / -22	F1HFP	+1 / -	4	✓ Closing fragment
09-21 20:47	40m	- / -	UR9QQ	-12 / -	3	Partial capture
09-21 16:35	40m	- / -	UT9NA	-22 / -	3	Partial capture
09-21 16:17	40m	- / -	SP3GHC	+2 / -	2	Partial capture
09-12 21:48	40m	- / -	RD6OZ	0 / -	2	Partial capture
09-12 21:07	40m	- / -	SV1DKR	-9 / -	5	Partial capture
09-12 21:05	40m	- / -	R3LCG	-1 / -	3	Partial capture
09-12 21:05	40m	- / -	SM/DB9LG	-13 / -	2	Partial capture
09-12 21:05	40m	- / -	DL1SRS	-10 / -	2	Partial capture
09-05 21:52	40m	- / -10	EX7CQ	-1 / -	2	✓ Closing fragment
09-05 21:18	40m	- / -	RD7O	+2 / -	3	Partial capture
09-05 21:17	40m	- / -	R2BNC	-4 / -	2	Partial capture
08-22 21:33	20m	-14 / -	BI1AFK	- / -3	2	Partial capture
08-22 21:32	20m	- / -13	US5HL	+8 / -	2	✓ Closing fragment
08-22 21:09	40m	-11 / -	TN8GD	- / -16	3	✓ Closing fragment
08-22 21:02	40m	-12 / -16	9A4ZM	+3 / -17	5	✓ Full exchange observed
08-22 21:01	40m	- / -9	DK7ZT	-5 / -	2	Partial capture
08-22 21:00	40m	-9 / -	SV3AUW	-14 / -16	2	✓ Closing observed
08-22 20:56	40m	- / -	UF5F	-3 / -	3	Partial capture
08-22 20:55	40m	- / -	RA6FYL	-10 / -	2	Partial capture
08-22 20:54	40m	-10 / -15	9A3EYA	+6 / -15	3	✓ Full exchange observed
08-22 20:54	40m	- / -	OK1SI	+10 / -	2	Partial capture
08-22 20:53	40m	- / -	LZ3CB	-2 / -	3	Partial capture
08-22 20:53	40m	- / -5	RN6HK	+9 / -	5	✓ Closing fragment
08-22 20:53	40m	- / -	DL1ESZ	-13 / -	3	Partial capture
08-22 13:26	20m	-6 / -	NE9U	- / -13	2	✓ Closing fragment
08-22 13:24	20m	-8 / -	KC5OCH	- / -10	4	✓ Closing fragment
08-22 13:24	20m	- / -	R7OV	-5 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
085200  +3 1908  JM3UGA 4Z5ML KM72 (x3)

40m

UTC    dB Audio  Message
205200 +14  695  JM3UGA HB9ELE 73
210045 -22 2460  RI1FJZ JM3UGA PM74
211130  -4 1071  JM3UGA DL3MIB JN57 (x2)
211230 -10 1817  JM3UGA RZ4FWA LO23 (x2)
211300  -6 1071  JM3UGA DL3MIB R-05
211330  -8 1817  JM3UGA RZ4FWA LO23
211330  -3 1071  JM3UGA DL3MIB 73
202645  -6  788  JM3UGA 7X2RF -14 (x2)
213400 -16 2119  JM3UGA CT7BRV IM58 (x4)

80m

UTC    dB Audio  Message
210230  +8 2445  JM3UGA F5LQ IN94 (x2)
210500  +2 1037  JM3UGA RU3T LO16
210530  +8 1149  JM3UGA UA4FKT R-08
210530  -3 1037  JM3UGA RU3T LO16
210530 +11 2837  JM3UGA LY1DY -20
210600  +3 1064  JM3UGA YO4BXX KN44
210600 +11 2837  JM3UGA LY1DY -20
210630  +5 1064  JM3UGA YO4BXX KN44
210630  -6 2257  JM3UGA R7HL LN04
210630 +18 2837  JM3UGA LY1DY -20 (x2)
204600  +7 2252  JM3UGA IS0JHQ -19 (x3)

20m

UTC    dB Audio  Message
132400  +0 2624  JM3UGA R7OV KN87
132415  -9 2624  KC5OCH JM3UGA -10
132430 -10 2624  JM3UGA R7OV KN87
132445  -9 2623  KC5OCH JM3UGA RR73
132500  +2 2624  JM3UGA DL2VER JN49
132515  -6 2624  KC5OCH JM3UGA RR73
132530  -2 2623  JM3UGA DH1FH JN48
132545  -9 2625  KC5OCH JM3UGA RR73
132615  -7 2624  NE9U JM3UGA -13 (x2)
213200  +9 2583  JM3UGA US5HL -13 (x2)
213315 -15 1290  BI1AFK JM3UGA -03 (x2)
213530  -7 1765  JM3UGA EA7EZ IM76

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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