JA2JNA — 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: PM94

Receiver-side FT8 activity involving JA2JNA, decoded by SO8OO in southeastern Poland. 102 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 13 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-11-05.

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 102 FT8 messages attributed to JA2JNA as the transmitting token by decoded message structure across 13 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (64%), followed by 80 m (36%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (69%); the estimated median was -4 dB.

Overview

102

Messages attributed

UTC dates decoded

Active 15-min windows

-4 dB

Estimated median S/N

Bands

80m · 37 20m · 65

First attributed message: 2026-06-06
Last attributed message: 2026-11-05 20:23 UTC

Observed FT8 message patterns

Attributed sample: 102 messages
Active dates: 13 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -17 to +3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 16, moderate (-15 to -9 dB) 16, strong (≥ -8 dB) 70.

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 JA2JNA in decoded directed-looking exchanges:

ON4IQ · Belgium ×3 4J3DJ · Azerbaijan E73S · Bosnia-Herzegovina F4EZJ · France F5UKW · France IW0FFK · Italy OH2IS · Finland ON7NQ · Belgium PI4DX · Netherlands SV1BLD · Greece SV8JE · Greece 9A5CW · Croatia

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 JA2JNA

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: PM94 · 17 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,783 km (approx.)
Last such locator decoded: 2026-08-09 20:07 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	JA2JNA S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-05 20:22	80m	-17 / -19	OE6IMD	+15 / -25	4	Partial capture
11-05 20:21	80m	-16 / -22	SP5AA	+8 / -15	4	✓ Full exchange observed
11-05 20:19	80m	- / -18	OE8DDX	+20 / -	2	✓ Closing fragment
10-30 20:20	160m	- / -21	SV1BLD	+2 / -	2	✓ Closing fragment
10-29 20:24	160m	- / -15	UX0QT	0 / -	8	Partial capture
10-29 20:22	160m	- / -10	ON8DM	+6 / -	2	Partial capture
10-29 20:19	160m	- / -5	OH2IS	-1 / -	4	✓ Closing fragment
10-29 20:19	160m	- / -6	F4EZJ	-6 / -	2	✓ Closing fragment
10-29 20:09	160m	- / -	UT7UA	+2 / -	7	Partial capture
10-29 20:02	160m	- / -12	ON7NQ	-4 / -	4	✓ Closing fragment
10-29 20:01	160m	- / -1	SP3BPU	+9 / -	15	Partial capture
10-29 19:49	160m	- / -	SP3BPU	+10 / -	7	Partial capture
10-29 19:48	160m	- / -	OH5KNL	-3 / -	3	Partial capture
10-29 19:46	160m	- / -15	F5UKW	+5 / -	3	✓ Closing fragment
10-29 19:46	160m	- / -16	ON4IQ	+13 / -	4	✓ Closing fragment
10-28 20:16	160m	- / -12	E73S	+14 / -	2	✓ Closing fragment
10-28 20:15	160m	- / -	IK0PHY	-7 / -	4	Partial capture
10-27 20:24	80m	- / -	SP4JSR	+3 / -	8	Partial capture
10-18 20:45	80m	-18 / -3	HA8IB	-5 / -25	4	✓ Full exchange observed
10-18 20:42	80m	-16 / -	HA8IB	- / -13	2	Partial capture
10-18 20:36	80m	-6 / -	SQ3DQ	- / -5	4	Partial capture
10-18 20:33	80m	-3 / -8	YL3KZ	+4 / -15	5	✓ Full exchange observed
10-18 20:32	80m	-7 / -	SQ3DQ	- / -4	3	Partial capture
10-18 20:24	80m	-13 / -	F6CTT	- / -15	2	✓ Closing fragment
10-16 20:21	160m	- / -12	4J3DJ	-2 / -	2	✓ Closing fragment
10-16 20:18	160m	- / -15	IW0FFK	+14 / -	3	✓ Closing fragment
10-16 20:14	160m	- / -	IK0PHY	-11 / -	7	Partial capture
10-16 20:11	160m	- / -	IZ6BRN	+17 / -	2	Partial capture
10-14 20:13	80m	-16 / -13	IZ8WGR	0 / -14	4	✓ Full exchange observed
10-13 20:30	80m	- / -17	ES2AJ	+11 / -	2	✓ Closing fragment
10-09 21:14	80m	- / -	SP9AU	+9 / -	3	Partial capture
10-09 21:11	80m	- / -	DJ2AX	+5 / -	3	Partial capture
10-09 21:11	80m	- / -16	IK0PHY	+6 / -	6	✓ Closing fragment
10-09 21:10	80m	-16 / -17	IT9PQU	-6 / -12	6	✓ Full exchange observed
10-09 21:09	80m	-19 / -22	SP5LST	+5 / -	4	✓ Closing observed
10-09 21:08	80m	-15 / -7	IT9VCE	0 / +2	4	✓ Full exchange observed
10-09 21:07	80m	- / -14	IK5CHL	-1 / -	3	✓ Closing fragment
10-08 20:24	80m	- / -13	HA8AR	-14 / -	2	✓ Closing fragment
10-04 20:16	80m	- / -	SP9FZH	+4 / -	6	Partial capture
10-04 20:13	80m	- / -	RZ4AT	-2 / -	2	✓ Closing fragment
10-04 20:13	80m	- / -15	SP5LST	+9 / -	4	Partial capture
10-04 20:13	80m	- / -	SQ3RX	+5 / -	4	Partial capture
10-04 20:12	80m	- / -8	RT6Z	-2 / -	3	✓ Closing fragment
10-04 20:10	80m	- / -16	OT7K	+14 / -	2	✓ Closing fragment
10-03 20:53	80m	- / -	UA3AVY	-2 / -	2	✓ Closing fragment
10-03 20:52	80m	- / -14	ON4IQ	+18 / -	2	✓ Closing fragment
09-29 20:30	80m	- / -11	OH2BV	+22 / -	2	✓ Closing fragment
09-29 20:27	80m	-18 / -	OH2BV	- / -6	2	Partial capture
09-27 20:49	40m	- / -8	F4CPJ	+6 / -	10	✓ Closing fragment
09-27 20:46	40m	- / -	F6FHZ	-3 / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
202545  +4 2033  JA2JNA SP4JSR KO12 (x5)
201930 +21 2553  JA2JNA OE8DDX -18 (x2)
202100  +6 1851  JA2JNA SP5AA JO92
202115 -16 2578  SP5AA JA2JNA -15
202130  +8 1851  JA2JNA SP5AA R-22 (x2)
202230 +12 2838  JA2JNA OE6IMD -19 (x2)
202315 -17 2550  OE6IMD JA2JNA R-25
202330 +15 2838  JA2JNA OE6IMD -19

160m

UTC    dB Audio  Message
202115  -2 2483  JA2JNA OH2IS R-05
202215  +9  439  JA2JNA ON8DM JO10
202215  +2 2483  JA2JNA OH2IS 73
202245  +4  439  JA2JNA ON8DM R-10
202415  -3  870  JA2JNA UX0QT KN28
202415  -3 1204  JA2JNA UT7UA KO50
202445  +0  870  JA2JNA UX0QT -15 (x7)
202045  +0 2448  JA2JNA SV1BLD R-21 (x2)

40m

UTC    dB Audio  Message
204600  -3 2515  JA2JNA F6FHZ JN18 (x4)
204900  +6 2506  JA2JNA F4CPJ JN19 (x3)
205000  -4 2805  JA2JNA EA5IT IM99
205100  +5 2506  JA2JNA F4CPJ JN19 (x7)

20m

UTC    dB Audio  Message
202230  -8 2377  JA2JNA D2IM R-13

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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