JR1CWY — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: PM96

Receiver-side FT8 activity involving JR1CWY, decoded by SO8OO in southeastern Poland. 12 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-09-07 and 2026-09-10.

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 12 FT8 messages attributed to JR1CWY as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -8 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-8 dB

Estimated median S/N

Bands

40m · 12

First attributed message: 2026-09-07
Last attributed message: 2026-09-10 21:00 UTC

Observed FT8 message patterns

Attributed sample: 12 messages
Active dates: 2 UTC dates
Estimated median S/N: -8 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 8.

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 JR1CWY in decoded directed-looking exchanges:

II7WWA · Italy HA9PP · Hungary R7DX · European Russia UA3QQG · European Russia

Most frequent locator attributed to JR1CWY

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 · 7 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,603 km (approx.)
Last such locator decoded: 2026-09-10 20:55 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	JR1CWY S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-10 20:59	40m	- / -	IZ4EKI	-10 / -	2	Partial capture
09-10 20:59	40m	-8 / -	RA3UAG	- / -9	2	Partial capture
09-10 20:57	40m	-7 / -14	UA3QQG	-14 / -22	7	✓ Full exchange observed
09-10 20:57	40m	- / -	UX1VT	-6 / -	3	Partial capture
09-10 20:56	40m	- / -12	DK7ZT	+6 / -	2	Partial capture
09-10 20:56	40m	- / -	RL3K	-5 / -	3	Partial capture
09-10 20:56	40m	- / -	IK5ZPV	-3 / -	10	Partial capture
09-10 20:55	40m	-8 / -	R73SLET	- / -	2	Partial capture
09-10 20:45	40m	-8 / -	EI2CN	- / -	3	Partial capture
09-07 21:04	40m	-16 / -	EA8UP	- / -	2	Partial capture
09-07 20:59	40m	- / -5	HA9PP	-10 / -	4	✓ Closing fragment
08-11 21:07	40m	- / -11	R7DX	-10 / -	2	✓ Closing fragment
08-10 21:30	40m	- / -	Z34K	-14 / -	2	Partial capture
07-14 21:26	40m	- / -	S57BTI	-1 / -	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
205815 -10 2115  JR1CWY UA3QQG RR73
205815  -5  666  JR1CWY IK5ZPV JN53
205830  -6  465  UA3QQG JR1CWY R-22
205845 -16 2115  JR1CWY UA3QQG RR73
205900  -8  465  UA3QQG JR1CWY 73
205915  -6  853  JR1CWY IK5ZPV JN53
205930  -6  465  RA3UAG JR1CWY -09
205945 -13 1358  JR1CWY IZ4EKI JN54
205945  -5  853  JR1CWY IK5ZPV JN53
210000 -11  465  RA3UAG JR1CWY -09
210015  +1  853  JR1CWY IK5ZPV JN53 (x2)
210115  -8 1358  JR1CWY IZ4EKI JN54
210115  -5  853  JR1CWY IK5ZPV JN53 (x2)

20m

UTC    dB Audio  Message
210630 -20 1110  JR1CWY II7WWA RR73
211145  -6 1172  JR1CWY II5WWA -21
205930 -23 1352  JR1CWY T77RN +07

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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