OK2ZU — 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 OK2ZU, decoded by SO8OO in southeastern Poland. 108 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 5 UTC dates in the available aggregate history. Observed between 2026-08-18 and 2026-09-14.

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 108 FT8 messages attributed to OK2ZU as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (56%), followed by 80 m (44%). 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 strong S/N range (93%); the estimated median was +6 dB.

Overview

108

Messages attributed

UTC dates decoded

Active 15-min windows

+6 dB

Estimated median S/N

Bands

80m · 47 40m · 61

First attributed message: 2026-08-18
Last attributed message: 2026-09-14 16:04 UTC

Observed FT8 message patterns

Attributed sample: 108 messages
Active dates: 5 UTC dates
Estimated median S/N: +6 dB
Estimated 10th-90th percentile: -6 to +12 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 8, strong (≥ -8 dB) 100.

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 OK2ZU in decoded directed-looking exchanges:

UA4FKT · European Russia ×2 DK6WS · Fed. Rep. of Germany ×2 DL2VN · Fed. Rep. of Germany DL6EL · Fed. Rep. of Germany E70SZ · Bosnia-Herzegovina F1IQH · France F1PBZ · France OE6OCG · Austria ON5ACO · Belgium OZ7CL · Denmark RA4ABH · European Russia S57CT · Slovenia

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 OK2ZU

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 · 51 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 491 km (approx.)
Last such locator decoded: 2026-09-14 16:03 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	OK2ZU S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-14 16:03	40m	-9 / -	ON5ACO	- / -3	2	✓ Closing fragment
09-14 16:00	40m	-10 / -12	OZ7CL	-9 / -5	4	✓ Full exchange observed
09-14 15:56	40m	-4 / -11	DL2VN	-13 / -	4	✓ Closing observed
09-14 15:56	40m	-4 / -	SP3SBY	-1 / -4	4	✓ Closing observed
09-14 15:55	40m	- / -4	OE6OCG	-2 / -	3	✓ Closing fragment
09-07 18:17	80m	+6 / -	F5LVR	-10 / -3	4	✓ Full exchange observed
09-07 18:15	80m	+8 / -1	DO2XB	+11 / -	6	✓ Closing observed
09-07 18:14	80m	- / -	DO6KGS	-23 / -	3	Partial capture
09-07 18:13	80m	+6 / +3	DL3MIB	+6 / -	6	✓ Full exchange observed
09-07 18:13	80m	+8 / -	LB5WB	-6 / -9	6	✓ Full exchange observed
08-29 18:26	80m	+2 / -	SP5DFK	-7 / -7	3	✓ Closing observed
08-29 18:23	80m	+8 / -4	SP1ZMO	+1 / -	5	✓ Closing observed
08-29 18:22	80m	+12 / -11	HF5A	+13 / -3	4	✓ Full exchange observed
08-29 18:22	80m	- / -	SP6PCB	+2 / -	6	✓ Closing fragment
08-29 18:19	80m	+7 / -	DK6WS	-10 / +1	4	✓ Full exchange observed
08-29 18:14	80m	+9 / -	DF4FS	-18 / -10	4	✓ Closing observed
08-29 18:14	80m	+4 / -	DL/AD2LX	- / 0	2	Partial capture
08-29 18:13	80m	+3 / +1	DL9KM	-7 / -1	4	Partial capture
08-29 18:11	80m	+8 / +2	DO1FZL	-12 / -7	6	✓ Full exchange observed
08-29 18:09	80m	+1 / -16	OE6BME	0 / -	5	✓ Closing observed
08-29 18:08	80m	- / -	UA3ZQN	-1 / -	3	Partial capture
08-29 18:08	80m	-2 / -7	UB4FGK	-9 / -17	7	✓ Full exchange observed
08-29 18:04	80m	+6 / -17	UA4FKT	0 / -17	7	✓ Full exchange observed
08-27 17:12	40m	+6 / -	FK8HA	- / -	3	Partial capture
08-27 17:05	40m	- / -	US1MM	+4 / -	2	Partial capture
08-27 17:04	40m	+2 / -	F1PBZ	- / -9	2	✓ Closing fragment
08-27 17:02	40m	+10 / -	OK8CZ	- / -1	2	Partial capture
08-27 16:59	40m	- / -	OK8CZ	-6 / -	2	Partial capture
08-27 16:59	40m	+8 / -	S57CT	0 / -	4	✓ Closing observed
08-27 16:59	40m	+8 / -	UA4FKT	+1 / -9	3	✓ Closing observed
08-27 16:49	40m	+15 / -	BD8FWI	- / -	8	Partial capture
08-27 16:44	40m	+12 / -	BD8FWI	- / -	3	Partial capture
08-27 16:31	40m	+14 / -	E70SZ	+3 / +6	5	✓ Full exchange observed
08-18 16:38	40m	-6 / -	R4FCK	- / -10	2	Partial capture
08-18 16:36	40m	-4 / -12	F1IQH	-16 / -5	5	✓ Full exchange observed
08-18 16:30	40m	+3 / -	RA4ABH	-9 / -4	6	✓ Closing observed
08-18 16:28	40m	+4 / -	DL6EL	-4 / +8	5	✓ Closing observed
08-18 16:27	40m	+5 / +2	UX7QV	-8 / +9	5	✓ Full exchange observed
07-05 10:29	10m	- / -11	IQ4JO	-10 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
155745 -13 1356  OK2ZU DL2VN 73
155830  -4 1421  SP3SBY OK2ZU -04 (x2)
160000  -4 1421  CQ OK2ZU JN79 (x2)
160045  -9 1094  OK2ZU OZ7CL JO56
160045 -13 1421  OK2ZU DC6MT JN49
160100  -9 1421  OZ7CL OK2ZU -05
160115  -9 1094  OK2ZU OZ7CL R-12
160130 -11 1421  OZ7CL OK2ZU RR73
160200 -12 1421  CQ OK2ZU JN79 (x3)
160330  -8 1421  ON5ACO OK2ZU R-03 (x2)

80m

UTC    dB Audio  Message
181545  -8  867  OK2ZU LB5WB R+18
181545 -24 1918  OK2ZU DO6KGS JO50
181545 +10  631  OK2ZU DO2XB JO71
181600  +8  866  LB5WB OK2ZU RR73
181615  -5  867  OK2ZU LB5WB 73
181615 -22 1918  OK2ZU DO6KGS JO50
181615 +15  631  OK2ZU DO2XB JO71 (x2)
181700  +8  867  DO2XB OK2ZU RR73
181715  -8  867  OK2ZU F5LVR JN38
181715  +9  631  OK2ZU DO2XB 73
181730  +7  867  F5LVR OK2ZU -03
181745 -12  867  OK2ZU F5LVR R+14
181800  +4  867  F5LVR OK2ZU RR73
182615 -24 1919  OK2ZU DO6KGS JO50

10m

UTC    dB Audio  Message
102445 -21 1585  OK2ZU PD0LBY JO22
102745 -14 2580  OK2ZU F4PCM JN23
102915 -10 2371  OK2ZU IQ4JO R-11 (x2)
142415 -24 1734  OK2ZU PE9JAN JO22
121145 -23 1995  OK2ZU F1TXI R+13

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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