JH0RNN — 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 JH0RNN, decoded by SO8OO in southeastern Poland. 50 FT8 messages attributed to this token as transmitter, on 160m, 80m, across 11 UTC dates in the available aggregate history. Observed between 2026-08-21 and 2026-11-02.

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 50 FT8 messages attributed to JH0RNN as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (96%), followed by 160 m (4%). 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 weak S/N range (74%); the estimated median was -18 dB.

Overview

50
Messages attributed
11
UTC dates decoded
16
Active 15-min windows
-18 dB
Estimated median S/N

Bands

160m · 2 80m · 48
First attributed message: 2026-08-21
Last attributed message: 2026-11-02 20:06 UTC

Observed FT8 message patterns

Attributed sample
50 messages
Active dates
11 UTC dates
Estimated median S/N
-18 dB
Estimated 10th-90th percentile
-24 to -13 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 37, moderate (-15 to -9 dB) 12, 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 JH0RNN 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 JH0RNN

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 · 32 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,513 km (approx.)
Last such locator decoded
2026-11-02 20:06 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 UTCBandJH0RNN S/NCounterpartCounterpart S/NMsgsCapture
11-05 21:56 80m - / -19 SP6JIU +22 / - 2 ✓ Closing fragment
11-05 21:20 80m - / - R7KR -8 / - 2 Partial capture
11-02 19:51 80m - / -20 SP3SLA +14 / - 2 ✓ Closing fragment
11-02 19:47 80m - / - YO2MAX +18 / - 2 ✓ Closing fragment
11-01 21:10 80m - / - SP4JSR +10 / - 3 Partial capture
11-01 20:35 160m - / -24 EW1I +25 / - 3 Partial capture
10-31 20:37 160m - / -17 UR4LRG +11 / - 4 ✓ Closing fragment
10-31 20:35 160m - / -22 SP1D +8 / - 3 ✓ Closing fragment
10-30 13:53 80m - / -13 OH4TQ -1 / - 2 ✓ Closing fragment
10-29 21:02 160m - / -15 DF2UU +6 / - 3 ✓ Closing fragment
10-29 20:55 160m - / - SP3BPU +13 / - 5 Partial capture
10-29 20:53 160m - / -21 RK6OQ -12 / - 2 Partial capture
10-29 20:49 160m - / -12 G4IRN -2 / - 2 ✓ Closing fragment
10-29 20:49 160m - / -22 IZ8HUJ -16 / - 3 Partial capture
10-29 20:37 160m - / - DJ0CL -4 / - 2 Partial capture
10-29 20:36 160m - / - OM3RP +5 / - 3 Partial capture
10-29 20:35 160m - / -23 G0BNR -17 / - 4 ✓ Closing fragment
10-29 20:34 160m - / -19 ON4IQ -4 / - 2 ✓ Closing fragment
10-29 20:26 160m - / - IZ6KPR -13 / - 7 Partial capture
10-29 20:26 160m - / -10 UA3LID 0 / - 4 ✓ Closing fragment
10-29 20:26 160m - / -21 IW4AOT 0 / - 2 ✓ Closing fragment
10-29 20:24 160m - / -13 DL9MRF +7 / - 3 ✓ Closing fragment
10-29 20:22 160m - / - SP8VJV 0 / - 4 Partial capture
10-29 20:21 160m -19 / -23 IW0RGN 0 / - 6 ✓ Closing observed
10-29 20:17 160m - / -24 SV1BLD -11 / - 2 ✓ Closing fragment
10-29 20:17 160m - / - UX0QT +2 / - 2 Partial capture
10-29 20:16 160m - / - SV8DCY -7 / - 3 Partial capture
10-29 20:16 160m - / -17 IW0RGN 0 / - 3 Partial capture
10-29 20:15 160m - / -13 F4EZJ -2 / - 2 ✓ Closing fragment
10-28 20:49 160m - / -3 SV8QG -12 / - 7 ✓ Closing fragment
10-28 20:48 160m - / -20 F5UKW +7 / - 5 ✓ Closing fragment
10-28 20:48 160m - / -13 EC6AAE -7 / - 3 ✓ Closing fragment
10-27 20:59 80m - / -14 IS0LAY -4 / - 2 ✓ Closing fragment
10-27 20:38 80m -20 / -13 SM3PZG -4 / -16 4 ✓ Full exchange observed
10-25 21:09 160m - / -21 OH2BV +7 / - 2 ✓ Closing fragment
10-25 20:56 80m - / -11 4O4A +19 / - 2 ✓ Closing fragment
10-25 20:46 80m - / -3 4O4A +16 / - 3 Partial capture
10-24 22:02 40m - / - F5NNN -10 / - 6 Partial capture
10-24 21:14 80m -18 / - OD5ZZ - / - 2 Partial capture
10-23 22:06 80m - / -25 4O4A +11 / - 2 Partial capture
10-23 21:34 80m - / -13 4O4A +15 / - 3 Partial capture
10-23 13:51 80m - / - RK6OQ -14 / - 4 Partial capture
10-22 14:49 80m - / - UA3IDQ -9 / - 3 Partial capture
10-21 14:29 80m - / -13 OH3NXW +1 / - 3 ✓ Closing fragment
10-18 21:08 80m - / -17 DF3IS +3 / - 2 ✓ Closing fragment
10-18 21:03 80m - / -16 SP5GMM -7 / - 4 ✓ Closing fragment
10-18 21:01 80m -24 / -14 HA8IB -9 / -13 5 ✓ Full exchange observed
10-18 21:00 80m -23 / -17 SP1D +11 / -18 3 ✓ Full exchange observed
10-18 20:57 80m -22 / - HA8IB - / - 3 Partial capture
10-18 20:56 160m - / - HA6NN -10 / - 37 Partial capture

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
135330  +0 2454  JH0RNN OH4TQ RR73
211015 +10 3017  JH0RNN SP4JSR KO12 (x3)
194730 +18  688  JH0RNN YO2MAX KN15 (x2)
195130 +12 2741  JH0RNN SP3SLA -20 (x2)
200630 -20 1879  I1RJP JH0RNN PM97
211630 -12 1040  JH0RNN UR3HC KN69
211900  -9 2614  JH0RNN YO2CR RR73
212030  -8 2614  JH0RNN R7KR KN85 (x2)
215630 +20  781  JH0RNN SP6JIU -19 (x2)
160m 
UTC    dB Audio  Message
210215  +7  249  JH0RNN YO2NAA KN05
210245  +5 1162  JH0RNN DF2UU -15 (x3)
203515  +5 2675  JH0RNN SP1D -22 (x3)
203715 +13 2838  JH0RNN UR4LRG KO80 (x4)
203545 +22 2807  JH0RNN EW1I -24 (x3)
204015  +2 1762  JH0RNN OG8A RR73
40m 
UTC    dB Audio  Message
205630  -7 1342  JH0RNN LZ4VR KN13 (x5)
150715  +1 1918  JH0RNN HA9PP KN07
220200  -7 2014  JH0RNN F5NNN IN94
220200 -15 1368  JH0RNN DL7ACA JO40
220230 -11 2014  JH0RNN F5NNN IN94 (x5)
221600 +11 2582  JH0RNN EA6ABF RR73
10m 
UTC    dB Audio  Message
105530 -15  908  JH0RNN EC3SP JN11

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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