JA1SJS — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Locator transmitted in a decoded message: QM05

Receiver-side FT8 activity involving JA1SJS, decoded by SO8OO in southeastern Poland. 64 related FT8 messages, 10 CQ messages, observed on 20m, 10m, across 6 UTC dates. Heard between 2026-08-07 and 2026-08-23.

These are automated observations at the SO8OO receiver, not the station's official logbook. Times are UTC. Decoder S/N describes messages received at SO8OO; inferred entity and location data may be inaccurate for portable, remote or special-event operation.

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Overview

Related messages

CQ messages

UTC dates heard

-5 dB

Mean decoder S/N

Bands

20m 10m

First seen: 2026-08-07
Last seen: 2026-08-23 20:50 UTC

Frequent QSO partners observed at SO8OO

Stations JA1SJS worked most often, as logged from our receiver:

DL1ARS · Fed. Rep. of Germany T88RR · Palau A92AE · Bahrain EI8GS · Ireland BA4II · China D2UY · Angola R7ZY · European Russia 4Z5AY · Israel IS0LYN · Sardinia DG6VC · Fed. Rep. of Germany R6MG · European Russia HB9TIH · Switzerland

Activity Heatmap

Locator transmitted by JA1SJS

Approximate centre of QM05, decoded 2026-08-23 22:51 UTC. A transmitted locator is not proof of the operator's permanent location.

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	JA1SJS S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-23 22:48	20m	-13 / -5	4Z5AY	+7 / -9	6	✓ Full exchange observed
08-23 21:50	20m	-4 / -	BG7DTK	- / -2	4	Partial capture
08-23 21:46	20m	-3 / -	BG7BVI	- / -12	5	✓ Closing fragment
08-23 21:45	20m	-4 / -	A92AE	- / -10	2	✓ Closing fragment
08-23 21:44	20m	-3 / -	F5RAV	- / -11	3	✓ Closing fragment
08-23 21:43	20m	-4 / -	DL1ARS	- / -16	2	✓ Closing fragment
08-23 21:38	20m	- / -	EA5OM	-2 / -	5	Partial capture
08-23 21:34	20m	-10 / -	ON2CB	- / -	6	✓ Closing fragment
08-23 21:31	20m	- / -	HB9TIH	0 / -	2	✓ Closing fragment
08-23 21:25	20m	-10 / -	DL1R	-2 / -15	8	Partial capture
08-23 21:25	20m	- / -	HB9TIH	+5 / -	7	Partial capture
08-23 21:20	20m	-6 / -	R7ZY	-9 / -8	3	✓ Closing observed
08-23 21:19	20m	-7 / -	BA4II	- / -9	2	✓ Closing fragment
08-23 21:14	20m	-8 / -8	SV1DZB	-12 / 0	9	✓ Full exchange observed
08-11 13:20	20m	- / -13	EI8GS	-16 / -	2	✓ Closing fragment
08-08 14:26	20m	- / -14	R6MG	-4 / -	2	✓ Closing fragment
08-08 14:21	20m	- / -	ON7NQ	+4 / -	6	Partial capture
08-07 13:30	20m	- / -	RA4ABH	-10 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
215315  -4 2814  CQ JA1SJS QM05 (x2)
223200 -13 1352  JA1SJS OD5ZZ RR73
224145 -12 2572  CQ JA1SJS QM05
224300 -19 1678  JA1SJS EA3AAY JN11
224715 -13 2609  CQ JA1SJS QM05
224800  +4 2913  JA1SJS 4Z5AY KM72 (x2)
224845 -10 2608  DG6VC JA1SJS RR73
224900  +6 2913  JA1SJS 4Z5AY KM72
224915 -13 2608  4Z5AY JA1SJS -09
224930  +7 2914  JA1SJS 4Z5AY R-05 (x2)
225045 -13 2608  CQ JA1SJS QM05
225145 -13 2609  TL8GD JA1SJS QM05

10m

UTC    dB Audio  Message
114630 -24 1837  JA1SJS D2UY RR73

Decoder S/N history by band

Daily averages across messages associated with this profile as decoded at SO8OO.