JA0VSH — 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: PM85

Receiver-side FT8 activity involving JA0VSH, decoded by SO8OO in southeastern Poland. 15 FT8 messages attributed to this token as transmitter, on 80m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-02 and 2026-10-24.

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 15 FT8 messages attributed to JA0VSH as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%). In this small sample, the estimated median decoder S/N was -19 dB; no usual signal pattern is inferred.

Overview

15
Messages attributed
5
UTC dates decoded
9
Active 15-min windows
-19 dB
Estimated median S/N

Bands

80m · 15
First attributed message: 2026-07-02
Last attributed message: 2026-10-24 21:31 UTC

Observed FT8 message patterns

Attributed sample
15 messages
Active dates
5 UTC dates
Estimated median S/N
-19 dB
S/N percentile sample
Too small
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 13, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 0.

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 JA0VSH in decoded directed-looking exchanges:

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 JA0VSH

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
PM85 · 13 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,586 km (approx.)
Last such locator decoded
2026-10-24 21:31 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 UTCBandJA0VSH S/NCounterpartCounterpart S/NMsgsCapture
11-04 19:35 160m - / - OH2IS 0 / - 2 Partial capture
11-04 19:34 160m - / -19 IS0JHQ +9 / - 6 Partial capture
10-31 20:34 160m - / - UT7AA -6 / - 3 Partial capture
10-31 20:31 160m - / -21 ON7NQ +16 / - 2 ✓ Closing fragment
10-31 20:28 160m - / -13 ON8DM 0 / - 2 Partial capture
10-31 20:25 160m - / -16 R5WW +10 / - 4 ✓ Closing fragment
10-31 20:20 160m - / -14 IW4AOT -2 / - 3 ✓ Closing fragment
10-31 20:18 160m - / -21 RU3DNN -1 / - 3 ✓ Closing fragment
10-31 20:17 160m - / -13 UG4L -14 / - 3 ✓ Closing fragment
10-31 20:16 160m - / -18 OM2ZZ +8 / - 2 ✓ Closing fragment
10-31 20:15 160m - / - OM3RP +4 / - 7 Partial capture
10-30 19:38 160m - / -11 E77AR +14 / - 2 ✓ Closing fragment
10-30 19:29 160m - / -16 UA4CC +6 / - 2 ✓ Closing fragment
10-30 18:55 160m - / -13 E73S -2 / - 2 ✓ Closing fragment
10-25 14:13 160m - / -23 OH3SR +4 / - 2 ✓ Closing fragment
10-24 21:30 80m -21 / - S9R - / - 2 Partial capture
10-24 18:14 80m - / - RA5BM 0 / - 2 Partial capture
10-23 16:37 80m - / -23 OH5KNL +5 / - 3 Partial capture
10-23 16:24 80m - / - OH5KNL +7 / - 3 Partial capture
10-23 15:59 80m -18 / - OD5ZZ - / - 4 Partial capture
10-15 20:49 80m - / -10 LX1JH +2 / - 2 ✓ Closing fragment
10-01 14:27 80m - / -18 RY4C -22 / - 2 Partial capture
09-03 20:09 160m - / -14 LA9GX -9 / - 2 ✓ Closing fragment
08-30 20:28 80m - / -14 UX1AA -2 / - 2 ✓ Closing fragment
08-30 20:22 80m -19 / - EA8UP - / - 2 Partial capture
08-24 10:52 10m - / -12 G4PMZ -16 / - 2 ✓ Closing fragment
08-23 13:44 10m - / -14 DN9SGE -18 / - 4 ✓ Closing fragment
08-23 13:33 10m - / -1 ON4IQ -4 / - 2 ✓ Closing fragment
08-23 13:03 10m - / - DN9OPA -20 / - 4 Partial capture

Recent FT8 messages decoded at SO8OO

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

160m 
UTC    dB Audio  Message
202845  +0 1752  JA0VSH ON8DM R-13
203145 +15 2895  JA0VSH ON7NQ -21
203215  -5 1753  JA0VSH ON8DM JO10
203215 +16 2895  JA0VSH ON7NQ RR73
203445  -6 1825  JA0VSH UT7AA KO70 (x3)
193400  +7 2404  JA0VSH IS0JHQ R-19 (x3)
193530  +0 1938  JA0VSH OH2IS KP10
193530  +9 2404  JA0VSH IS0JHQ R-19
193600  +1 1938  JA0VSH OH2IS KP10
193600  +8 2404  JA0VSH IS0JHQ R-19 (x2)
80m 
UTC    dB Audio  Message
160115 -19  351  OD5ZZ JA0VSH PM85 (x4)
162400  +4 2572  JA0VSH OH5KNL KP30 (x6)
181430  -2 1385  JA0VSH RA5BM KO85 (x2)
213045 -23 1059  S9R JA0VSH PM85 (x2)
175615  +6 2400  JA0VSH IS0JHQ RR73
10m 
UTC    dB Audio  Message
130345 -16 2155  JA0VSH DN9OPA JN38 (x4)
133315  -8 2599  JA0VSH ON4IQ -01 (x2)
134430 -22 1967  JA0VSH DN9SGE JO42 (x4)
105200 -16 1369  JA0VSH G4PMZ -12 (x2)

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

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee