JS6TWW — 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: PL55

Receiver-side FT8 activity involving JS6TWW, decoded by SO8OO in southeastern Poland. 10 FT8 messages attributed to this token as transmitter, on 80m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-18 and 2026-10-04.

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 10 FT8 messages attributed to JS6TWW 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%). In this small sample, the estimated median decoder S/N was -18 dB; no usual signal pattern is inferred.

Overview

10
Messages attributed
3
UTC dates decoded
3
Active 15-min windows
-18 dB
Estimated median S/N

Bands

80m · 10
First attributed message: 2026-06-18
Last attributed message: 2026-10-04 20:04 UTC

Observed FT8 message patterns

Attributed sample
10 messages
Active dates
3 UTC dates
Estimated median S/N
-18 dB
S/N percentile sample
Too small
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, 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 JS6TWW in decoded directed-looking exchanges:

Most frequent locator attributed to JS6TWW

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
PL55 · 2 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
9,123 km (approx.)
Last such locator decoded
2026-10-04 20:03 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 UTCBandJS6TWW S/NCounterpartCounterpart S/NMsgsCapture
10-19 12:26 10m - / -9 CN8WK +8 / - 2 ✓ Closing fragment
10-04 20:03 80m -24 / -8 RW9MZ -16 / -19 4 ✓ Full exchange observed
10-04 19:53 160m - / -18 UW5ZM +8 / - 2 ✓ Closing fragment
10-04 19:49 160m - / - UW5ZM +13 / - 3 Partial capture
09-25 20:11 80m - / -16 UX1AA -5 / - 5 ✓ Closing fragment
09-16 21:04 40m - / -7 IZ8GUU -11 / - 2 ✓ Closing fragment
08-27 11:26 10m - / -15 DL3MIB -4 / - 4 ✓ Closing fragment
08-08 20:35 80m -18 / -17 IK7FBK -3 / - 7 ✓ Closing observed
08-08 20:34 80m - / - SV3CKF -9 / - 2 Partial capture
08-08 20:32 80m -17 / - OH3OJ/1 - / -10 2 Partial capture
08-08 20:31 80m -18 / -15 RT6Z +12 / -14 7 ✓ Full exchange observed
08-08 20:30 80m - / -16 <...> +7 / - 3 Partial capture
08-08 20:30 80m -14 / -13 IT9ZZO +12 / - 3 ✓ Closing observed
08-08 20:25 160m - / -19 RA9YTI -14 / - 3 ✓ Closing fragment
08-08 20:22 160m - / -22 SV8JE +6 / - 3 ✓ Closing fragment
08-01 20:19 80m - / - EA3HCJ -10 / - 3 Partial capture
08-01 20:19 80m - / - SV8JE +11 / - 5 Partial capture
07-29 11:52 20m - / - IK4LZH +6 / - 4 Partial capture
07-29 11:45 20m - / - IK4LZH +5 / - 3 Partial capture
07-27 07:06 10m - / - IU1ETR +6 / - 3 Partial capture
07-27 02:28 20m - / -14 9A5E -15 / - 2 ✓ Closing fragment
07-25 20:14 40m - / -4 UT4VL -21 / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

10m 
UTC    dB Audio  Message
070600 +10  591  JS6TWW IU1ETR JN35 (x3)
112600  -3 1065  JS6TWW DL3MIB JN57 (x4)
122615 +10 2471  JS6TWW CN8WK -09 (x2)
40m 
UTC    dB Audio  Message
201400 -18 1869  JS6TWW UT4VL -04 (x3)
210445 -14 1219  JS6TWW IZ8GUU -07 (x2)
122945 -15 2144  JS6TWW SP9IML JN99
80m 
UTC    dB Audio  Message
203730  -1 2318  JS6TWW IK7FBK R-17 (x2)
203815 -18 1806  IK7FBK JS6TWW RR73
203830  -8 1444  JS6TWW SV3CKF KM06
203830  -3 2318  JS6TWW IK7FBK 73
201145  -1 1621  JS6TWW UX1AA KO70 (x5)
200345 -24 1924  RW9MZ JS6TWW PL55
200400 -17 1828  JS6TWW RW9MZ -08
200415 -24 1924  RW9MZ JS6TWW R-19
200430 -14 1828  JS6TWW RW9MZ RR73
200530  +5 2729  JS6TWW HA5MIG -16
160m 
UTC    dB Audio  Message
202200  +5  305  JS6TWW SV8JE KM08 (x3)
202530 -14 1648  JS6TWW RA9YTI MO93 (x3)
194915 +11  346  JS6TWW UW5ZM KN57 (x5)
20m 
UTC    dB Audio  Message
022800 -14 2207  JS6TWW 9A5E -14 (x2)
114545  +3  463  JS6TWW IK4LZH JN54 (x7)

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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