UA9JTJ/4 — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Asiatic Russia

Receiver-side FT8 activity involving UA9JTJ/4, decoded by SO8OO in southeastern Poland. 18 FT8 messages attributed to this token as transmitter, on 40m, across 3 UTC dates in the available aggregate history. Observed between 2026-09-10 and 2026-09-12.

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 18 FT8 messages attributed to UA9JTJ/4 as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -17 dB; no usual signal pattern is inferred.

Overview

18
Messages attributed
3
UTC dates decoded
7
Active 15-min windows
-17 dB
Estimated median S/N

Bands

40m · 18
First attributed message: 2026-09-10
Last attributed message: 2026-09-12 13:11 UTC

Observed FT8 message patterns

Attributed sample
18 messages
Active dates
3 UTC dates
Estimated median S/N
-17 dB
S/N percentile sample
Too small
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 10, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 5.

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 UA9JTJ/4 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.

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 UTCBandUA9JTJ/4 S/NCounterpartCounterpart S/NMsgsCapture
09-12 15:55 40m - / +10 OM1AN +14 / - 2 Partial capture
09-12 13:11 40m -6 / -3 OK1FHI +3 / -22 3 Partial capture
09-12 07:40 40m - / - IK2IKW -12 / - 2 Partial capture
09-12 06:49 40m - / -5 YO5PSE -4 / - 2 Partial capture
09-11 21:22 40m - / - I5HLK -12 / - 2 Partial capture
09-11 20:41 80m - / -14 DL1SVI +4 / - 6 Partial capture
09-11 20:37 40m - / -1 PD0WH -11 / - 2 Partial capture
09-11 19:41 80m - / - RK6OQ -10 / - 2 Partial capture
09-11 19:11 40m - / - ES6DO +6 / - 2 Partial capture
09-11 18:45 40m +6 / - F1RAU 0 / +3 3 Partial capture
09-11 16:45 40m - / -25 RX3VF -18 / - 2 Partial capture
09-11 16:38 40m - / - R4HJN -12 / - 2 Partial capture
09-11 16:37 40m -15 / - <...> -11 / - 6 ✓ Closing fragment
09-11 15:48 40m - / - UT2UB -3 / - 2 Partial capture
09-11 09:32 40m - / - DL7UKM +2 / - 3 Partial capture
09-11 07:07 40m - / -16 SP2BZ -5 / - 3 Partial capture
09-11 06:50 40m - / -20 US1MM -10 / - 2 Partial capture
09-11 06:45 40m - / -18 G0OYQ -10 / - 3 Partial capture
09-11 06:34 40m - / - ON5MA -11 / - 7 Partial capture
09-11 06:11 40m - / - ON5MA -11 / - 12 Partial capture
09-11 05:43 40m - / - ON5MA -17 / - 3 Partial capture
09-11 04:36 40m - / - 2W0YOX -14 / - 2 ✓ Closing fragment
09-11 04:21 40m -13 / - Z335MK - / - 3 ✓ Closing fragment
09-11 04:19 40m - / -24 R2DX -10 / - 3 Partial capture
09-11 04:16 40m - / - <...> -12 / - 3 ✓ Closing fragment
09-11 03:58 80m - / - HB9ALO -14 / - 9 Partial capture
09-11 03:54 40m - / -5 RX3ASQ -10 / - 2 Partial capture
09-11 03:51 40m - / - R2DX -5 / - 14 Partial capture
09-10 18:50 40m - / -14 UX5UW +4 / - 2 Partial capture
09-10 15:42 40m - / +7 DG9ZL -7 / - 2 Partial capture
09-10 15:09 40m -17 / - <...> +2 / - 2 ✓ Closing fragment
09-10 15:08 40m -22 / -9 RN6MA -5 / -9 2 Partial capture
09-10 15:02 40m -23 / - <...> -17 / - 2 ✓ Closing fragment
09-10 05:58 40m - / +1 ON7KY -14 / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
212215 -18 1640  UA9JTJ/4 I5HLK JN53 (x2)
051615  -6 2051  UA9JTJ/4 SV7BAY KN21
051745  +5 2733  UA9JTJ/4 DL2YBG JO42
064915  -6  827  UA9JTJ/4 YO5PSE KN07 (x2)
074045 -11 2052  UA9JTJ/4 IK2IKW JN55 (x2)
131000  -2 2054  YT1DDL UA9JTJ/4 -19
131100  -8 2054  OK1FHI UA9JTJ/4 -22 (x2)
131145  +3 2054  UA9JTJ/4 OK1FHI R-03
131215  +3 2053  UA9JTJ/4 SP7VCL -04
155515 +14 2828  UA9JTJ/4 OM1AN JN88 (x2)
80m 
UTC    dB Audio  Message
040000 -15 1163  UA9JTJ/4 HB9ALO JN45 (x6)
182645  +4 1158  UA9JTJ/4 RK6OQ KN87 (x3)
204145  +4 1160  UA9JTJ/4 DL1SVI JO60 (x6)

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.

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