JM1JZN — 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: PM96

Receiver-side FT8 activity involving JM1JZN, decoded by SO8OO in southeastern Poland. 35 FT8 messages attributed to this token as transmitter, on 160m, 80m, across 2 UTC dates in the available aggregate history. Observed between 2026-09-21 and 2026-10-09.

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 35 FT8 messages attributed to JM1JZN as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (94%), followed by 160 m (6%). In this small sample, the estimated median decoder S/N was -16 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-16 dB

Estimated median S/N

Bands

160m · 2 80m · 33

First attributed message: 2026-09-21
Last attributed message: 2026-10-09 16:33 UTC

Observed FT8 message patterns

Attributed sample: 35 messages
Active dates: 2 UTC dates
Estimated median S/N: -16 dB
Estimated 10th-90th percentile: -19 to -13 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 21, moderate (-15 to -9 dB) 14, strong (≥ -8 dB) 0.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with JM1JZN in decoded directed-looking exchanges:

DJ7M · Fed. Rep. of Germany ×2 ES2AJ · Estonia EU3AA · Belarus G4IRN · England LY1G · Lithuania R1IO · European Russia R7MR · European Russia RA7T · European Russia RC2SB · European Russia RY3K · European Russia S57MPU · Slovenia SV9CVY · Crete

Most frequent locator attributed to JM1JZN

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: PM96 · 14 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,603 km (approx.)
Last such locator decoded: 2026-10-09 16:32 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	JM1JZN S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-21 18:58	160m	- / -16	R7MR	+7 / -	3	✓ Closing fragment
10-21 16:16	160m	- / -	R7AW	-12 / -	2	Partial capture
10-19 20:25	160m	- / -	OH5KNL	0 / -	2	Partial capture
10-19 20:21	160m	- / -	YU1LD	-17 / -	2	Partial capture
10-19 17:30	160m	- / -	OK2BPU	+13 / -	2	Partial capture
10-18 18:44	160m	- / -	R5BS	+10 / -	2	Partial capture
10-18 18:42	160m	- / -	S53R	+14 / -	4	Partial capture
10-18 17:41	160m	- / -	SP6ZC	0 / -	2	Partial capture
10-18 17:31	160m	- / -	RJ6B	-4 / -	2	Partial capture
10-18 16:54	160m	- / -18	RY3K	0 / -	2	✓ Closing fragment
10-13 19:38	160m	- / -24	OK2BUZ	+22 / -	12	Partial capture
10-13 19:00	160m	- / -	RM3ZR	-16 / -	4	Partial capture
10-13 18:56	160m	- / -20	IZ7NLJ	-11 / -	4	Partial capture
10-13 18:55	160m	- / -12	R3GO	-8 / -	4	Partial capture
10-13 18:53	160m	- / -	R3ZMM	-11 / -	4	Partial capture
10-12 20:35	160m	- / -15	R1IO	-4 / -	2	✓ Closing fragment
10-11 19:33	80m	- / -15	R3BDQ	+2 / -	12	Partial capture
10-10 20:09	80m	- / -17	OT7K	+19 / -	3	✓ Closing fragment
10-10 17:10	80m	- / -20	RW3QW	-6 / -	6	✓ Closing fragment
10-10 17:05	80m	- / -19	R7CD	0 / -	3	✓ Closing fragment
10-09 18:22	80m	- / -8	UA4HJ	-4 / -	2	✓ Closing fragment
10-09 18:15	80m	- / +1	9A5E	+9 / -	7	Partial capture
10-09 17:14	80m	- / -10	YT7DX	+4 / -	2	✓ Closing fragment
10-09 17:13	80m	- / -10	RO2X	+11 / -	6	✓ Closing fragment
10-09 16:36	80m	- / -	IW2OHP	-10 / -	2	Partial capture
10-09 16:36	80m	- / -	RD3K	+2 / -	2	Partial capture
10-09 16:33	80m	- / -13	RD6OX	-4 / -	4	✓ Closing fragment
10-09 16:31	80m	- / -	HB9ALO	-3 / -	7	Partial capture
10-09 16:31	80m	- / -	OK1XV	+16 / -	5	Partial capture
10-09 16:30	80m	-15 / -	SD5X	- / -16	6	Partial capture
10-09 16:29	80m	- / -	HA2EOA	+8 / -	2	Partial capture
10-09 16:28	80m	-18 / -	BA5AN	- / -2	2	✓ Closing fragment
10-09 16:26	80m	-13 / -12	UA3QNA	+7 / -5	6	✓ Full exchange observed
10-09 16:24	80m	-17 / -9	IK5CHL	+4 / -	5	✓ Closing observed
10-09 16:16	160m	- / -8	R4RN	-11 / -	2	Partial capture
10-09 16:04	80m	- / -	DO9SAM	-4 / -	4	Partial capture
10-09 16:04	80m	-21 / -13	HA1TNX	+15 / -	4	✓ Closing observed
10-09 16:01	80m	-22 / -22	RK6OQ	-4 / -	5	✓ Closing observed
10-09 15:59	80m	- / -3	4Z5AV	-19 / -	3	✓ Closing fragment
10-09 15:58	80m	- / -	OM2WW	+5 / -	3	Partial capture
10-09 15:58	80m	- / -	UA4HBR	-6 / -	3	Partial capture
10-09 15:56	80m	-16 / -18	RC6OG	-4 / -	5	✓ Closing observed
10-09 15:54	80m	-16 / -	JQ2NDY	- / -16	2	✓ Closing fragment
10-09 15:51	80m	- / -	R3KLE	-14 / -	2	Partial capture
10-09 15:51	80m	-18 / -22	RD7LC	-13 / -11	3	Partial capture
10-09 15:48	80m	-16 / -16	R3RB	-9 / -13	15	✓ Full exchange observed
10-09 15:47	80m	-15 / -	RU4SO	- / -13	2	Partial capture
10-09 15:43	80m	-16 / -	4Z5AV	- / -	6	Partial capture
10-08 19:37	160m	- / -	UB3IBG	-14 / -	3	Partial capture
10-08 19:36	160m	- / -18	R3GO	-3 / -	8	Partial capture

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
173015 +18 1804  JM1JZN OK2BPU JN89
173100  +3 1154  JM1JZN OH8JP KP01
173215  +8 1804  JM1JZN OK2BPU JN89
173215 -12 1403  JM1JZN DK1AQ JO43
202115 -24 1925  JM1JZN YU1LD KN04 (x2)
202500  +4 2052  JM1JZN OH5KNL KP30 (x2)
192300 +21 2809  JM1JZN SP9WZS JO90
161600 -13 1189  JM1JZN R7AW KN95 (x3)
185830  +8  549  JM1JZN R7MR -16 (x3)

80m

UTC    dB Audio  Message
200900 +17  723  JM1JZN OT7K -17 (x3)
193330  +1 2714  JM1JZN R3BDQ -15 (x12)

40m

UTC    dB Audio  Message
213145 -10 1728  JM1JZN HZ1TT -18

20m

UTC    dB Audio  Message
174130  -5 1259  JM1JZN IS0LYN JN40 (x6)
174715  -7 1761  JM1JZN EA8UP +03
174745  -1 2817  JM1JZN F1SZC IN95
174745  -8 1761  JM1JZN EA8UP +03 (x2)
174945  +5 2817  JM1JZN F1SZC 73
180045  -4 2714  JM1JZN EA5AYC IM98

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

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee