OK1TRJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Czech Republic Most frequent locator attributed to this token: JN79

Receiver-side FT8 activity involving OK1TRJ, decoded by SO8OO in southeastern Poland. 945 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, across 21 UTC dates in the available aggregate history. Observed between 2026-07-08 and 2026-09-13.

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 945 FT8 messages attributed to OK1TRJ as the transmitting token by decoded message structure across 21 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (44%), followed by 80 m (27%) and 40 m (27%). Most decodes (89%) fell within the six-hour window 18:00-00:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (90%); the estimated median was -1 dB.

Overview

945

Messages attributed

UTC dates decoded

Active 15-min windows

-1 dB

Estimated median S/N

Bands

160m · 11 80m · 258 60m · 420 40m · 256

First attributed message: 2026-07-08
Last attributed message: 2026-09-13 20:21 UTC

Observed FT8 message patterns

Attributed sample: 945 messages
Active dates: 21 UTC dates
Estimated median S/N: -1 dB
Estimated 10th-90th percentile: -8.7 to +6.4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 13, moderate (-15 to -9 dB) 82, strong (≥ -8 dB) 850.

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 OK1TRJ in decoded directed-looking exchanges:

F5RRS · France ×3 SN5J · Poland ×2 LZ1ZF · Bulgaria ×2 F1PBZ · France ×2 IQ4JO · Italy ×2 OH6FSO · Finland ×2 DL3XRZ · Fed. Rep. of Germany ×2 MI0OBC · Northern Ireland ×2 TA4RC · Asiatic Turkey ×2 DL4KSD · Fed. Rep. of Germany SQ2BXI · Poland 9K2OW · Kuwait

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 OK1TRJ

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: JN79 · 514 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 491 km (approx.)
Last such locator decoded: 2026-09-13 20:21 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 UTC	Band	OK1TRJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-13 20:18	60m	-3 / -5	PC1TG	-11 / -15	3	✓ Full exchange observed
09-13 20:11	60m	+10 / -	SP5MIG	- / +8	2	✓ Closing fragment
09-13 20:07	60m	+6 / +6	OH3GBW	+2 / -15	5	✓ Full exchange observed
09-13 20:06	60m	+6 / -2	LB9VH	-12 / -12	4	✓ Full exchange observed
09-13 20:04	60m	+4 / -	EC3A	- / -5	3	✓ Closing fragment
09-13 18:56	60m	-3 / -4	IW2FUT	-12 / +2	5	✓ Full exchange observed
09-13 18:49	60m	+2 / -12	M0UOO	-6 / -7	9	✓ Full exchange observed
09-13 18:47	60m	-1 / +5	OZ1AXG	+7 / +10	7	✓ Full exchange observed
09-13 18:46	60m	-2 / +1	9A9O	0 / +7	5	✓ Full exchange observed
09-13 18:44	60m	-6 / -	9A60CBM	- / -9	2	Partial capture
09-13 18:43	60m	-3 / -15	GX4RAF/P	-10 / -12	5	✓ Full exchange observed
09-13 18:41	60m	0 / 0	OZ9FF	-2 / +7	5	✓ Full exchange observed
08-15 01:01	20m	- / -18	9K2OW	-14 / -	2	✓ Closing fragment
08-10 17:40	40m	-20 / -	RL2F	- / +10	2	Partial capture
08-10 17:37	40m	-9 / -8	UR7FM	-2 / +9	8	✓ Full exchange observed
08-09 23:29	80m	+3 / +7	IV3FSG	+18 / -	3	Partial capture
08-09 23:27	80m	+8 / -3	HB9EFK	+11 / -	5	✓ Full exchange observed
08-09 23:25	60m	- / +8	GW4FRX	+4 / -	2	✓ Closing fragment
08-07 23:32	60m	+10 / -6	IK5FKF	-7 / -5	4	✓ Full exchange observed
08-06 21:34	80m	-4 / -8	Z62NS	+3 / -	3	✓ Closing observed
08-06 20:53	20m	- / -14	UA3ALY	-22 / -	2	Partial capture
08-06 20:47	20m	- / -14	OZ1HBM	-6 / -	2	✓ Closing fragment
08-06 20:36	20m	- / -18	GB64MOD	+8 / -	2	Partial capture
08-06 20:04	20m	- / -1	GM6DX	-6 / -	2	✓ Closing fragment
08-06 19:59	20m	- / -23	G0VXE	+12 / -	2	✓ Closing fragment
08-06 19:18	20m	- / -11	R3UAX	-2 / -	2	✓ Closing fragment
08-05 23:36	20m	- / -19	DJ2MS	-18 / -	2	✓ Closing fragment
08-05 23:06	80m	-14 / -	TA1MHS	- / -	2	Partial capture
08-05 23:02	60m	+2 / -	WA1NGH	- / -13	2	✓ Closing fragment
08-05 23:00	60m	+3 / -	EA3FCQ	-7 / +4	4	✓ Closing observed
08-05 22:57	60m	+5 / -	EA5JKT	- / -5	3	✓ Closing fragment
08-05 22:52	40m	-3 / +1	SP0DF	-14 / +6	5	✓ Full exchange observed
08-05 22:44	40m	-5 / -	ZB2CM	- / -	4	✓ Closing fragment
08-05 20:23	40m	+5 / -	UA9SY	- / -14	2	✓ Closing fragment
08-05 20:19	40m	+5 / -	JH4IFF	- / -	3	Partial capture
08-05 20:17	40m	+3 / +3	R4ZZ	-8 / +2	4	✓ Full exchange observed
08-05 20:14	40m	0 / 0	DM2RM	+8 / -	6	✓ Full exchange observed
08-05 20:10	40m	+3 / -	9A3TGY	- / -6	3	✓ Closing fragment
08-05 20:07	40m	+2 / -	R2DX	- / -3	3	✓ Closing fragment
08-05 20:05	40m	0 / -	EA7KUH	- / -7	2	Partial capture
08-05 20:02	40m	0 / -	JA4FKX	- / -15	5	Partial capture
08-05 19:00	80m	+2 / -20	R1NO	-6 / -6	6	Partial capture
08-05 00:08	40m	+1 / -	HK3X	- / -	2	Partial capture
08-05 00:03	40m	-8 / -	KM4JB	- / -	3	Partial capture
08-05 00:02	40m	-16 / -	IK4IDY	- / -	3	✓ Closing fragment
08-04 23:33	80m	+6 / -5	OH6FSO	-2 / -10	6	✓ Full exchange observed
08-04 23:31	80m	+7 / -9	HB10GBT	+9 / +8	3	Partial capture
08-04 23:29	60m	-6 / +8	OZ7FOC	-6 / +7	3	Partial capture
08-04 23:26	60m	-7 / +9	HG8LXL	+6 / +6	5	✓ Full exchange observed
08-04 23:23	60m	+8 / -5	DM8KM	+2 / -12	5	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
201500  +1 2288  CQ OK1TRJ JN79 (x6)
201800  -3 2288  PC1TG OK1TRJ -15
201815 -11 2534  OK1TRJ PC1TG R-05
201830  -3 2288  PC1TG OK1TRJ RR73
201900  +0 2288  CQ OK1TRJ JN79 (x6)

20m

UTC    dB Audio  Message
201000  +3 1936  OK1TRJ TM84TFR -10
203615  +8  905  OK1TRJ GB64MOD -18 (x2)
203845 -15 1618  OK1TRJ EA2EWL RR73
204315 -19 2300  OK1TRJ EI9KF RR73
204745  -4 1144  OK1TRJ OZ1HBM -14 (x2)
205345 -23 1841  OK1TRJ UA3ALY -14 (x2)
205745 -13  255  OK1TRJ 4X1UF -04 (x2)
231545  -3 1139  OK1TRJ LZ1ZF RR73
231730 -10  847  OK1TRJ EN35UKR -04
010130 -13 2465  OK1TRJ 9K2OW -18 (x2)

40m

UTC    dB Audio  Message
225445 -16 2033  OK1TRJ SP0DF RR73
225545  -6 2792  CQ OK1TRJ JN79 (x3)
224530 -10 1320  OK1TRJ ON3ABR RR73
173745 -11 2537  UR7FM OK1TRJ JN79
173800  -3 2537  OK1TRJ UR7FM -08
173815  -8 2538  UR7FM OK1TRJ R+09
173830  +2 2537  OK1TRJ UR7FM -08
173845  -8 2537  UR7FM OK1TRJ R+09
173900  -6 2537  OK1TRJ UR7FM -08
173915  -9 2538  UR7FM OK1TRJ R+09
173930  +0 2537  OK1TRJ UR7FM RR73
174030 -22 1756  RL2F OK1TRJ JN79 (x2)

80m

UTC    dB Audio  Message
190130  +2 2603  R1NO OK1TRJ R-06
230530 -16 2004  Z62NS OK1TRJ JN79
230600 -16 2004  TA1MHS OK1TRJ JN79 (x2)
213430  -2  915  Z62NS OK1TRJ JN79
213445  +3  914  OK1TRJ Z62NS -08
213530  -7  915  Z62NS OK1TRJ 73
232730  +5 2579  HB9EFK OK1TRJ JN79
232745 +13 2579  OK1TRJ HB9EFK -03
232800 +10 2579  HB9EFK OK1TRJ R+16
232815  +9 2579  OK1TRJ HB9EFK RR73
232830 +10 2579  HB9EFK OK1TRJ 73
232915  +5  735  IV3FSG OK1TRJ JN79
232930 +18  735  OK1TRJ IV3FSG +07
232945  +1  735  IV3FSG OK1TRJ R+18

160m

UTC    dB Audio  Message
221245  -2 1091  TM25TFR OK1TRJ R-10
223730 -14 1797  SN5J OK1TRJ JN79 (x2)
223815 +10 2736  OK1TRJ SN5J +04
223830  -8 1797  SN5J OK1TRJ R+01
223845 +13 2736  OK1TRJ SN5J RR73
223900  -3 1797  SN5J OK1TRJ 73
203630 -11  751  SQ2BXI OK1TRJ JN79
203745 -13  752  CQ OK1TRJ JN79
203845 -10  752  DL4KSD OK1TRJ RR73
203945 -13  752  CQ OK1TRJ JN79
204115 +10  296  OK1TRJ SQ2BXI -03 (x4)

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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