JR4XLE — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: PM53

Receiver-side FT8 activity involving JR4XLE, decoded by SO8OO in southeastern Poland. 30 FT8 messages attributed to this token as transmitter, on 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-14 and 2026-06-17.

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 30 FT8 messages attributed to JR4XLE as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 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 (67%); the estimated median was -14 dB.

Overview

30
Messages attributed
3
UTC dates decoded
6
Active 15-min windows
-14 dB
Estimated median S/N

Bands

20m · 30
First attributed message: 2026-06-14
Last attributed message: 2026-06-17 19:58 UTC

Observed FT8 message patterns

Attributed sample
30 messages
Active dates
3 UTC dates
Estimated median S/N
-14 dB
Estimated 10th-90th percentile
-19 to -10 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 20, strong (≥ -8 dB) 2.

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 JR4XLE in decoded directed-looking exchanges:

Most frequent locator attributed to JR4XLE

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
PM53 · 4 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,425 km (approx.)
Last such locator decoded
2026-06-17 19:44 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 UTCBandJR4XLE S/NCounterpartCounterpart S/NMsgsCapture
08-30 15:18 20m - / -19 M7TPT -2 / - 2 Partial capture
08-30 15:05 20m - / - M0CKX -2 / - 4 Partial capture
08-30 15:03 20m - / - PE1NZS -8 / - 3 ✓ Closing fragment
08-24 16:01 20m - / -17 G3TKF +4 / - 4 ✓ Closing fragment
08-24 15:43 20m - / -19 DL1GLO 0 / - 5 Partial capture
08-21 19:46 20m - / -16 DH2RL -1 / - 3 ✓ Closing fragment
08-21 15:39 20m - / -13 F5URG -3 / - 5 Partial capture
08-21 15:39 20m - / -18 ON4IQ +16 / - 4 ✓ Closing fragment
08-14 18:08 20m - / - RZ4FWA -19 / - 2 Partial capture
08-14 18:02 20m - / -20 F4LQJ -5 / - 5 ✓ Closing fragment
08-14 16:51 20m - / - F1SZC -19 / - 2 Partial capture
08-05 20:47 20m - / - OZ1LDO -20 / - 2 Partial capture
08-05 20:37 20m - / -14 EA1B -7 / - 5 ✓ Closing fragment
08-05 20:36 20m - / -14 F1DJY +12 / - 2 Partial capture
08-05 20:30 20m - / -20 G1ZOM -10 / - 3 Partial capture
08-02 21:11 20m - / - HB9FMC -1 / - 2 Partial capture
07-30 19:51 20m - / - DF0KK -8 / - 3 Partial capture
07-30 19:51 20m - / - F4MGP -22 / - 2 ✓ Closing fragment
07-24 19:34 20m - / -18 DB9LG -8 / - 5 Partial capture
07-21 17:16 20m - / - S56A +3 / - 2 Partial capture
07-21 13:33 20m - / - DM3NA -20 / - 2 Partial capture
07-15 20:29 20m - / - IK1RQX +1 / - 2 Partial capture
07-15 17:42 20m - / - RZ4FWA -14 / - 3 Partial capture
07-15 17:18 20m - / - RK3AQ -20 / - 3 Partial capture
07-15 17:02 20m - / - GJ0KYZ +2 / - 3 ✓ Closing fragment
07-12 20:52 20m - / -10 YO9HP -12 / - 2 ✓ Closing fragment
07-12 20:49 20m - / - DH1JG -23 / - 2 Partial capture
07-12 20:47 20m - / -17 US5HL -4 / - 3 Partial capture
07-12 20:45 20m - / - II2MPP -5 / - 3 Partial capture
07-11 19:14 20m - / -9 DL1HQN -10 / - 3 ✓ Closing fragment
07-11 19:11 20m - / -6 IQ4JO -13 / - 2 Partial capture
07-07 20:01 20m - / -12 9A2RD +8 / - 3 ✓ Closing fragment
07-07 19:35 20m - / - DL7VGU -1 / - 3 Partial capture
07-07 18:13 20m - / - R6DBT -19 / - 2 Partial capture
07-07 18:07 20m - / - R6DBT -16 / - 3 Partial capture
06-29 19:27 20m - / - DK2LG +16 / - 3 Partial capture
06-29 19:26 20m - / -15 IW9HPG -1 / - 4 ✓ Closing fragment
06-29 19:26 20m - / - RZ4FWA -16 / - 3 Partial capture
06-29 17:55 20m - / -14 4L7T -11 / - 2 Partial capture
06-26 17:23 20m - / -13 UA4FEN -9 / - 3 Partial capture
06-26 17:21 20m - / -17 PD4DX -12 / - 3 ✓ Closing fragment
06-24 17:14 20m - / -15 JY5IB -22 / - 2 Partial capture
06-24 17:01 20m - / -22 DH1FA -12 / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
154630  -6 2540  JR4XLE DL1GLO R-19
155115 -22 1692  JR4XLE PA0MUS R-18
160100  +2 2041  JR4XLE G3TKF R-17 (x4)
150330 -11 1653  JR4XLE PE1NZS JO21 (x3)
150530  -2 1572  JR4XLE M0CKX IO93 (x4)
151800  -3 2040  JR4XLE M7TPT R-19 (x2)

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