JL1RUC — 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 JL1RUC, decoded by SO8OO in southeastern Poland. 93 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 11 UTC dates in the available aggregate history. Observed between 2026-06-06 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 93 FT8 messages attributed to JL1RUC as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (67%), followed by 40 m (22%) and 80 m (12%). Several six-hour UTC windows tied for the largest share (83%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

93
Messages attributed
11
UTC dates decoded
23
Active 15-min windows
-11 dB
Estimated median S/N

Bands

First attributed message: 2026-06-06
Last attributed message: 2026-10-24 21:12 UTC

Observed FT8 message patterns

Attributed sample
93 messages
Active dates
11 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-18 to +1 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 29, moderate (-15 to -9 dB) 27, strong (≥ -8 dB) 37.

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.

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 JL1RUC

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 · 36 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,693 km (approx.)
Last such locator decoded
2026-10-24 21:12 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 UTCBandJL1RUC S/NCounterpartCounterpart S/NMsgsCapture
11-05 20:30 80m - / -18 OE8DDX +15 / - 2 ✓ Closing fragment
11-03 20:25 80m - / -17 TA7ARH -2 / - 3 Partial capture
11-01 20:52 80m - / -15 YO2MAX +10 / - 2 ✓ Closing fragment
11-01 20:49 80m - / -18 YO2MAX +9 / - 2 Partial capture
10-24 21:11 80m -18 / - S9R - / - 2 Partial capture
10-24 21:00 80m - / -6 LZ1GC +3 / - 5 ✓ Closing fragment
10-24 20:54 80m - / -15 LZ1GC +8 / - 2 Partial capture
10-24 20:54 80m - / -19 UW5KW +8 / - 6 ✓ Closing fragment
10-18 20:11 80m -16 / -18 ON6AA +4 / -15 4 Partial capture
10-18 20:08 80m -20 / - UW5KW - / - 2 Partial capture
10-18 19:59 80m - / -19 SP5GMM +5 / - 2 ✓ Closing fragment
10-16 21:48 40m - / +3 9A5CW -2 / - 5 ✓ Closing fragment
10-16 21:33 40m - / -15 HB9ELE +2 / - 15 ✓ Closing fragment
10-16 20:28 80m - / -17 ON4IQ +17 / - 2 ✓ Closing fragment
10-16 20:22 80m - / - RN3TT -6 / - 2 Partial capture
10-16 20:15 80m - / -18 UA6FM -5 / - 2 ✓ Closing fragment
10-15 20:34 80m - / -11 OH6XX +5 / - 2 ✓ Closing fragment
10-15 20:22 80m -18 / -14 OH8WW -4 / - 3 ✓ Closing observed
10-07 20:48 80m - / -20 HA1TNX +15 / - 2 ✓ Closing fragment
10-07 20:44 80m - / -15 S59A +7 / - 3 ✓ Closing fragment
10-05 20:18 80m - / - DJ7M +25 / - 2 ✓ Closing fragment
10-04 19:43 80m - / -20 OT7K +14 / - 2 ✓ Closing fragment
09-22 18:33 80m - / - UX1AA +4 / - 8 ✓ Closing fragment
09-12 18:45 40m - / - YO9BNP -10 / - 2 Partial capture
09-12 18:41 40m -10 / -11 EU4U +7 / - 3 ✓ Closing observed
09-12 18:36 40m -7 / - EW2ZC - / -12 3 Partial capture
09-12 18:29 40m - / -25 EW2ZC +1 / - 3 Partial capture
09-12 18:25 40m - / - UB6OCP -8 / - 2 Partial capture
09-12 18:24 40m - / -15 EW4DX +9 / - 2 ✓ Closing fragment
08-28 11:01 10m - / -12 CU2AP -22 / - 2 ✓ Closing fragment
08-28 10:48 10m - / - CU2AP -12 / - 3 Partial capture
08-27 12:03 20m - / - RW6HPS -3 / - 5 Partial capture
08-26 12:53 20m - / -20 F1ODM +3 / - 3 Partial capture
08-26 12:51 20m - / - F6GGA -1 / - 2 Partial capture
08-26 12:51 20m - / -11 PD2WL 0 / - 8 Partial capture
08-26 12:24 20m - / -13 ON1DGN -20 / - 3 Partial capture
08-26 12:24 20m - / - RZ4FWA -2 / - 2 Partial capture
08-26 12:11 20m - / -16 PD2WL +4 / - 4 Partial capture
08-26 11:55 20m - / -8 R4FDW -7 / - 5 Partial capture
08-26 10:12 20m - / +1 K4RUM -7 / - 3 ✓ Closing fragment
08-25 20:41 40m -18 / -13 SQ5NAN +14 / -11 3 ✓ Full exchange observed
08-25 20:37 40m -19 / +3 LZ1GC +9 / -6 5 ✓ Full exchange observed
08-25 20:34 40m -20 / - I2/DK6MAX - / -16 2 Partial capture
08-25 20:26 40m - / -17 RL3K 0 / - 4 Partial capture
08-25 20:25 40m - / -11 IV3FSG +16 / - 2 ✓ Closing fragment
08-25 20:22 40m -17 / - 9A4ZM - / -15 3 Partial capture
08-25 20:21 40m - / - PA3KUS -15 / - 3 Partial capture
08-25 20:20 40m -16 / -8 R3KON +10 / -11 6 ✓ Full exchange observed
08-25 20:19 40m - / - SP9BGL +8 / - 3 Partial capture
08-25 20:18 40m - / - PA3KUS -19 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

80m
UTC    dB Audio  Message
210100  +3 1138  JL1RUC LZ1GC -06 (x3)
211145 -18  397  S9R JL1RUC PM95 (x2)
204945 +10  812  JL1RUC YO2MAX -18 (x4)
202530  -1 1029  JL1RUC TA7ARH -17 (x3)
212000  +0 1835  JL1RUC ES2AJ R-16
203030 +14 2553  JL1RUC OE8DDX -18 (x2)
40m
UTC    dB Audio  Message
213645  +6  791  JL1RUC HB9ELE JN47 (x9)
214815  -7  403  JL1RUC 9A5CW JN65
214845 -16 1217  JL1RUC LB7ZG JP50
214845  +0  402  JL1RUC 9A5CW JN65 (x4)
160m
UTC    dB Audio  Message
164800 -17 1690  JL1RUC EX7CQ RR73
10m
UTC    dB Audio  Message
104830 -10 1163  JL1RUC CU2AP HM77 (x5)
20m
UTC    dB Audio  Message
125200  +1 2518  JL1RUC PD2WL -11
125200  +0 1287  JL1RUC F6GGA JN37
125230  +0 2518  JL1RUC PD2WL -11 (x3)
125330  +4 2524  JL1RUC F1ODM -20
125400  +3 2518  JL1RUC PD2WL -11
125430  +4 2524  JL1RUC F1ODM -20 (x2)
125530  -1 2518  JL1RUC PD2WL -11
120315  -1 2412  JL1RUC RW6HPS LN15 (x5)

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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