JA9CZE — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: PM86

Receiver-side FT8 activity involving JA9CZE, decoded by SO8OO in southeastern Poland. 80 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 10 UTC dates in the available aggregate history. Observed between 2026-06-06 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 80 FT8 messages attributed to JA9CZE as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (81%), followed by 20 m (19%). Most decodes (100%) fell within the six-hour window 19:00-01:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-8 dB

Estimated median S/N

Bands

40m · 65 20m · 15

First attributed message: 2026-06-06
Last attributed message: 2026-09-21 21:01 UTC

Observed FT8 message patterns

Attributed sample: 80 messages
Active dates: 10 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -17 to -4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 28, strong (≥ -8 dB) 41.

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 JA9CZE in decoded directed-looking exchanges:

DL5BWG · Fed. Rep. of Germany ×2 RK2A · European Russia ×2 R7DX · European Russia CT1FIU · Portugal E77FN · Bosnia-Herzegovina EA1B · Spain F8NHF · France G4DBW · England GJ0KYZ · Jersey IK2DFS · Italy LZ4VR · Bulgaria ON7NQ · Belgium

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 JA9CZE

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: PM86 · 30 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,497 km (approx.)
Last such locator decoded: 2026-09-21 20:37 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	JA9CZE S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 21:00	40m	-10 / -	TF8SM	- / -20	3	Partial capture
09-21 21:00	40m	- / -6	IT9PHU	-6 / -	2	Partial capture
09-21 20:46	40m	- / -	M9LDX	-9 / -	2	Partial capture
09-21 20:45	40m	-10 / -5	IU8RFW	-1 / -	4	✓ Closing observed
09-21 20:45	40m	- / -11	F5MYK	-10 / -	2	✓ Closing fragment
09-21 20:40	40m	- / -9	IT9PHU	-9 / -	5	✓ Closing fragment
09-21 20:38	40m	-6 / -	OE3UKW	- / -12	2	✓ Closing fragment
09-21 20:34	40m	-5 / -	TF8SM	- / -	6	Partial capture
09-21 20:21	40m	- / -8	DL7ACA	+4 / -	3	✓ Closing fragment
09-21 20:18	40m	- / -8	HB9ELE	+9 / -	5	✓ Closing fragment
09-21 20:17	40m	- / -12	TF8KW	-22 / -	2	✓ Closing fragment
09-19 21:27	40m	- / -	F5PBG	+1 / -	2	Partial capture
09-19 21:23	40m	- / -	IU4PPL	-5 / -	2	Partial capture
09-16 21:25	40m	- / -8	F1BBI	-14 / -	3	Partial capture
09-16 21:22	40m	- / -	F4HJG	-7 / -	2	Partial capture
09-16 21:22	40m	- / -	R6DUW	-11 / -	5	Partial capture
09-16 21:21	40m	- / -11	PC2J	+7 / -	2	Partial capture
09-16 21:19	40m	- / -5	IK1LZF	-1 / -	3	✓ Closing fragment
09-16 21:18	40m	- / -21	CT3HU	-18 / -	4	✓ Closing fragment
09-16 21:16	40m	- / -	PC2J	+14 / -	2	Partial capture
09-16 21:14	40m	- / -	IK1LZF	-3 / -	2	Partial capture
09-16 21:09	40m	- / -15	HB9HOG	+7 / -	3	✓ Closing fragment
09-16 21:09	40m	- / -	PD2PE	-10 / -	2	Partial capture
09-16 21:05	40m	- / -14	G0GFC	-19 / -	2	Partial capture
09-16 21:05	40m	- / -17	DL2YCD	-10 / -	8	Partial capture
09-16 21:00	40m	-19 / -	CT3HU	- / -	6	Partial capture
09-15 20:24	40m	-12 / -	CERT/KP4QVQ	- / -20	5	Partial capture
09-15 20:22	40m	-8 / -	G4BWQ/P	- / -	2	Partial capture
09-15 19:23	40m	- / -	SQ8EFK	-14 / -	2	Partial capture
09-13 20:52	40m	-12 / -	DL5BWG	- / -17	2	✓ Closing fragment
09-13 20:51	40m	-15 / -	SP2Y	- / -8	2	✓ Closing fragment
09-13 20:49	40m	-14 / -14	I0KMJ	-9 / -4	5	✓ Full exchange observed
09-13 20:49	40m	- / -18	ON1JP	-22 / -	3	Partial capture
09-13 20:48	40m	-12 / -	HB9TIH	- / -16	2	✓ Closing fragment
09-13 20:45	40m	- / -6	UK8FF	-18 / -	2	✓ Closing fragment
09-13 20:33	40m	-6 / -	UW5KW	- / -10	2	✓ Closing fragment
09-13 20:32	40m	-5 / -4	R3KLE	+7 / -	4	✓ Closing observed
09-13 20:31	40m	-8 / -21	G0DYW	+3 / -20	7	✓ Full exchange observed
09-13 20:30	40m	-4 / -	UR6QA	- / -13	2	✓ Closing fragment
09-13 20:29	40m	-6 / -	RK2A	+4 / -	3	✓ Closing observed
09-13 20:27	40m	-8 / -18	EI2KC	+1 / -15	6	✓ Full exchange observed
09-12 21:14	40m	- / -17	DF1OLS	+5 / -	6	✓ Closing fragment
09-12 21:12	40m	- / -10	EA3EDU	-8 / -	3	✓ Closing fragment
09-11 20:53	40m	-4 / -12	RD6OB	+4 / -	4	✓ Closing observed
09-11 20:50	40m	- / -5	EA8UP	+5 / -	3	✓ Closing fragment
09-11 20:33	40m	-9 / -	BG3NQT	- / -4	3	✓ Closing fragment
09-11 20:30	40m	-8 / -13	DL2MIJ	+12 / -	4	✓ Closing observed
09-11 20:30	40m	-8 / -	F5PBG	-1 / -16	4	Partial capture
09-11 20:30	40m	-7 / -	F4IFK	-8 / -15	2	✓ Closing observed
09-11 20:27	40m	- / -	PD0IFI	+10 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
204445 -15 1673  JA9CZE IT9MRM 73
204515 -10 2686  JA9CZE F5MYK R-11
204545  +2  484  JA9CZE IU8RFW JN70
204545 -11 2686  JA9CZE F5MYK 73
204545 -12 1698  JA9CZE EC3A -07
204615  -2  484  JA9CZE IU8RFW R-05
204630 -10  483  IU8RFW JA9CZE RR73
204645  -9 1540  JA9CZE M9LDX IO94
204645  -2  484  JA9CZE IU8RFW 73
204715  -9 1540  JA9CZE M9LDX IO94
210000 -12  484  JA9CZE IT9PHU -06
210045 -16  484  TF8SM JA9CZE R-20 (x2)
210130  +0  484  JA9CZE IT9PHU -06
210145  -7  484  TF8SM JA9CZE R-20

20m

UTC    dB Audio  Message
204400  -7 1118  JA9CZE CS8ABF -09 (x2)
204600  +2 2371  JA9CZE EB3JT JN01 (x4)
204900 -18 1487  JA9CZE OE9GWV JN47 (x2)
202930  -1 3022  JA9CZE ON7NQ JO21 (x7)

10m

UTC    dB Audio  Message
082600 -21 2096  JA9CZE R7DX KN84 (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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