JA0FSB — 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: PM97

Receiver-side FT8 activity involving JA0FSB, decoded by SO8OO in southeastern Poland. 21 FT8 messages attributed to this token as transmitter, on 80m, across 3 UTC dates in the available aggregate history. Observed between 2026-07-31 and 2026-11-04.

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 21 FT8 messages attributed to JA0FSB as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%). 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 moderate S/N range (71%); the estimated median was -13 dB.

Overview

21
Messages attributed
3
UTC dates decoded
5
Active 15-min windows
-13 dB
Estimated median S/N

Bands

80m · 21
First attributed message: 2026-07-31
Last attributed message: 2026-11-04 20:45 UTC

Observed FT8 message patterns

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

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 15, 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.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with JA0FSB in decoded directed-looking exchanges:

Most frequent locator attributed to JA0FSB

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
PM97 · 8 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,513 km (approx.)
Last such locator decoded
2026-11-04 20:43 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 UTCBandJA0FSB S/NCounterpartCounterpart S/NMsgsCapture
11-04 21:26 160m - / - IZ7NLJ -22 / - 2 Partial capture
11-04 21:25 160m - / -21 SP3PLD +16 / - 2 ✓ Closing fragment
11-04 21:20 160m - / -17 R6AA -2 / - 2 ✓ Closing fragment
11-04 21:08 160m - / -15 F1PBZ +8 / - 2 Partial capture
11-04 20:59 160m - / - IT9KSS -5 / - 5 Partial capture
11-04 20:58 160m - / - R6DSW -16 / - 2 Partial capture
11-04 20:57 160m - / -16 RU3GF +4 / - 2 ✓ Closing fragment
11-04 20:55 160m - / - R6DSW -15 / - 2 Partial capture
11-04 20:53 160m - / -24 IK4MTK +6 / - 4 ✓ Closing fragment
11-04 20:53 160m - / - DF2UU +5 / - 3 Partial capture
11-04 20:52 160m - / -18 YO4CPO -16 / - 3 ✓ Closing fragment
11-04 20:45 80m - / - UF5F -12 / - 3 Partial capture
11-04 20:43 80m -11 / - YE4FNN - / -7 3 Partial capture
11-04 20:42 80m -9 / -16 SP9JZU +19 / - 3 ✓ Closing observed
10-30 13:36 80m - / - RY3D +5 / - 2 Partial capture
10-23 13:58 80m - / - UA3D +1 / - 2 Partial capture
09-27 20:52 80m -12 / -9 DJ7M +14 / - 3 ✓ Closing observed
09-27 20:46 80m - / - HA7XL +18 / - 16 Partial capture
09-27 20:46 80m -16 / - RY7F - / -19 5 ✓ Closing fragment
09-27 20:43 80m -14 / -18 LY1DY +6 / -16 5 ✓ Full exchange observed
09-27 20:40 80m -13 / -14 OH1TSM +4 / - 7 ✓ Closing observed
09-27 20:37 80m -14 / -19 DG5TF +9 / -22 6 ✓ Full exchange observed
09-27 20:36 80m - / 0 YL2AO +4 / - 2 ✓ Closing fragment
09-17 19:50 160m - / - RA3ZH -4 / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

160m 
UTC    dB Audio  Message
205930  -4  932  JA0FSB IT9KSS JM68 (x4)
210400 -13 1926  JA0FSB R6DSW KN85
210845 +11 2592  JA0FSB OM3RP JN88
210845  +6 2656  JA0FSB F1PBZ -15 (x2)
211600 -12 1067  JA0FSB IT9KSS RR73
212045  -2  449  JA0FSB R6AA -17 (x2)
212515 +14 1040  JA0FSB SP3PLD -21 (x2)
212645 -24 1774  JA0FSB IZ7NLJ JN81 (x2)
80m 
UTC    dB Audio  Message
205530 +17 2554  JA0FSB HA7XL JN97
135830  +1 2056  JA0FSB UA3D KO95 (x2)
125430 -18 2204  JA0FSB RL9F RR73
133630  +5  300  JA0FSB RY3D KO95 (x2)
204245  -9  655  SP9JZU JA0FSB PM97
204315 -12  655  YE4FNN JA0FSB PM97 (x2)
204400 +18 2630  JA0FSB SP9JZU -16 (x2)
204500 -16 1149  JA0FSB UF5F KO98 (x2)
204545  -8  655  YE4FNN JA0FSB R-07
204630  -7 1149  JA0FSB UF5F KO98

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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