JA1VSL — 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: PM95

Receiver-side FT8 activity involving JA1VSL, decoded by SO8OO in southeastern Poland. 6 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-11-07.

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 6 FT8 messages attributed to JA1VSL as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (67%), followed by 10 m (33%). In this small sample, the estimated median decoder S/N was -17 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

20m · 4 10m · 2

First attributed message: 2026-06-06
Last attributed message: 2026-11-07 07:56 UTC

Observed FT8 message patterns

Attributed sample: 6 messages
Active dates: 2 UTC dates
Estimated median S/N: -17 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 1.

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 JA1VSL in decoded directed-looking exchanges:

CR7BUJ · Portugal UR8IF · Ukraine RU6UR · European Russia R4PIN · European Russia RK4UZ · European Russia RW3ZR · European Russia RX9WM · Asiatic Russia SM5KNV · Sweden UA3GDJ · European Russia UA4FKT · European Russia

Most frequent locator attributed to JA1VSL

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: PM95 · 2 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,693 km (approx.)
Last such locator decoded: 2026-11-07 07:56 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	JA1VSL S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-06 14:27	40m	- / +5	SM5KNV	-2 / -	2	✓ Closing fragment
11-06 14:22	40m	- / -	SQ3F	+4 / -	2	Partial capture
11-06 14:16	40m	- / -	SQ3F	+5 / -	3	Partial capture
11-06 14:15	40m	- / -15	RK4UZ	-8 / -	2	✓ Closing fragment
11-02 13:49	40m	- / -16	RX9WM	-2 / -	3	✓ Closing fragment
11-02 13:40	40m	- / -10	UA3GDJ	0 / -	2	✓ Closing fragment
11-02 13:24	40m	- / -	UA4FKT	-2 / -	2	✓ Closing fragment
10-31 15:52	40m	- / -	RD7O	-12 / -	5	Partial capture
10-31 15:45	40m	- / -22	DK7ZT	-6 / -	3	Partial capture
10-31 15:44	40m	- / -18	IU1DOF	-6 / -	3	Partial capture
10-26 18:57	160m	- / -25	UR8IF	-22 / -	2	✓ Closing fragment
10-05 13:49	40m	- / -15	R4FV	-11 / -	3	Partial capture
10-05 13:31	40m	- / -	RA6YDX	-17 / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
075515 -18 2302  SN9Q JA1VSL -16
075615 -20 2302  CQ JA1VSL PM95                        a1
080900 -12 1195  JA1VSL CR7BUJ 73

40m

UTC    dB Audio  Message
134915  -3  401  JA1VSL RX9WM LO74 (x3)
141045 -15 1263  JA1VSL RC9WC -14
141515 -10 2701  JA1VSL RK4UZ R-15 (x2)
141615  +5  585  JA1VSL SQ3F JO81
141615 -14 1263  JA1VSL RC9WC -13
141645  +4  585  JA1VSL SQ3F JO81 (x4)
142700  -3 1120  JA1VSL SM5KNV R+05
142730  -2 2554  JA1VSL SV8QG KM39
142730  -1 1120  JA1VSL SM5KNV 73

160m

UTC    dB Audio  Message
175815 +11  476  JA1VSL ON4IQ JO20
185745 -23 2213  JA1VSL UR8IF R-25 (x2)

20m

UTC    dB Audio  Message
150000 -19 1159  JA1VSL RU6UR RR73
113815  +3 2288  JA1VSL IQ4JO JN63
141215  +3 2563  JA1VSL R8LCM R-16

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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