RZ4AT — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LN28

Receiver-side FT8 activity involving RZ4AT, decoded by SO8OO in southeastern Poland. 810 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 26 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-10-04.

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 810 FT8 messages attributed to RZ4AT as the transmitting token by decoded message structure across 26 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (44%), followed by 80 m (36%) and 20 m (21%). Most decodes (89%) fell within the six-hour window 15:00-21:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

810

Messages attributed

UTC dates decoded

101

Active 15-min windows

-8 dB

Estimated median S/N

Bands

80m · 289 40m · 353 20m · 167 10m · 1

First attributed message: 2026-06-09
Last attributed message: 2026-10-04 20:23 UTC

Observed FT8 message patterns

Attributed sample: 810 messages
Active dates: 26 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -20 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 173, moderate (-15 to -9 dB) 217, strong (≥ -8 dB) 420.

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 RZ4AT in decoded directed-looking exchanges:

R3YAU · European Russia ×2 R2EA/P · European Russia ×2 R3BCK · European Russia ×2 R6FGF · European Russia ×2 R9JE · Asiatic Russia RD0L · Asiatic Russia RO2X · European Russia UA0JBY · Asiatic Russia UA0LHS · Asiatic Russia UB1CDJ · European Russia BA7IWL · China EW4DX · Belarus

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 RZ4AT

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: LN28 · 458 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,686 km (approx.)
Last such locator decoded: 2026-10-04 20:23 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	RZ4AT S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-04 20:21	80m	-8 / -	JA1XEC	- / -	2	Partial capture
10-04 20:20	80m	-8 / -	JR1AIB	- / -	2	Partial capture
10-04 20:18	80m	-8 / -	JR1CFG	- / -15	3	✓ Closing fragment
10-04 20:17	80m	-6 / -	JF1UVJ	- / -14	2	✓ Closing fragment
10-04 20:13	80m	-2 / -	JA2JNA	- / -	2	✓ Closing fragment
10-04 20:10	80m	-1 / -	JE2DZC	- / -18	3	✓ Closing fragment
10-04 20:09	80m	-2 / -6	R6FGF	-14 / -3	4	✓ Full exchange observed
10-04 20:06	80m	-2 / -	RW9MZ	-19 / -4	5	✓ Closing observed
10-04 20:05	80m	-2 / -	R6AO	- / -6	2	✓ Closing fragment
10-04 20:03	80m	-4 / -	RK4HS	-23 / -	2	✓ Closing observed
10-04 20:01	80m	-6 / -	RY4D	-15 / -	3	✓ Closing observed
10-04 16:24	40m	-10 / -	DA125RH	- / -	2	Partial capture
10-03 20:28	80m	- / +2	RO2E/P	-16 / -	2	Partial capture
10-03 20:20	80m	- / -	R4SCQ	-10 / -	2	✓ Closing fragment
10-03 20:17	80m	-11 / -	RO2E/P	- / -20	2	Partial capture
10-01 21:16	80m	- / -2	R6OD	-3 / -	3	Partial capture
09-27 17:43	80m	-4 / -	UB6OFG	- / -	2	Partial capture
09-27 17:40	80m	-9 / -	RV3X	- / -	2	Partial capture
09-27 17:37	80m	-6 / -	RN3TT	-7 / -2	4	✓ Closing observed
09-27 17:34	80m	-1 / -10	R6KY	-6 / -	3	✓ Closing observed
09-27 17:32	80m	-2 / -3	RU3OH	+2 / +1	6	✓ Full exchange observed
09-27 17:32	80m	- / -1	RA6ZS	-12 / -	2	✓ Closing fragment
09-27 17:29	80m	-1 / -11	R2EA/P	-8 / -6	6	✓ Full exchange observed
09-12 20:38	80m	-10 / -10	R3BCK	-8 / -20	10	✓ Full exchange observed
09-12 20:31	80m	-4 / 0	R4RJ	-12 / -1	4	✓ Full exchange observed
09-12 20:31	80m	- / -	RO2X	-4 / -	4	Partial capture
09-12 20:30	80m	-2 / +3	RX4CK	-2 / +2	5	✓ Full exchange observed
09-12 20:28	80m	-3 / -5	R2EA	0 / -	4	✓ Closing observed
09-12 20:27	80m	-4 / -	UA3LKM	- / -17	2	✓ Closing fragment
09-08 20:34	80m	-4 / -9	JH4ADV	-9 / -5	6	✓ Full exchange observed
09-08 20:14	80m	-10 / -10	RW1AI	+8 / -3	3	✓ Full exchange observed
09-08 20:01	80m	-3 / +2	RA6YDX	-8 / +1	6	✓ Full exchange observed
09-08 19:53	80m	- / -5	RC7LX	-16 / -	2	✓ Closing fragment
09-08 19:52	80m	- / +6	R3YAU	+6 / -	2	✓ Closing fragment
09-08 19:45	80m	- / -2	UA3QQG	-6 / -	2	✓ Closing fragment
09-08 19:36	80m	0 / -10	UA3PY	-1 / -3	3	✓ Full exchange observed
08-23 16:15	20m	-11 / -	UA0LQE	- / -	10	Partial capture
08-23 11:54	20m	-8 / -	UA0LHS	- / -5	4	✓ Closing fragment
08-23 11:30	20m	-12 / -	UA0JBY	- / -	3	Partial capture
08-23 11:27	20m	-16 / -9	R9JE	-14 / -7	4	✓ Full exchange observed
08-23 11:09	20m	-22 / -	<...>	- / +5	3	Partial capture
08-22 12:59	20m	0 / -	RD0L	- / -8	5	✓ Closing fragment
08-22 12:56	20m	-2 / -	R6DOB/M	- / -	2	Partial capture
08-21 20:52	40m	-8 / -	JA5MHD	- / -	2	Partial capture
08-21 20:47	40m	-10 / -	UN7PPV	- / -11	2	✓ Closing fragment
08-21 20:35	80m	- / -	DO7RMS	-2 / -	2	Partial capture
08-21 20:31	80m	0 / -8	R2EA/P	-8 / -5	5	✓ Full exchange observed
08-21 20:28	80m	-7 / -	JA5XAE	- / -22	5	✓ Closing fragment
08-21 20:26	80m	-11 / +3	RV4AS	+2 / +2	4	✓ Full exchange observed
08-21 20:25	80m	-8 / -	JA9APS	- / -21	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
201300  -1 2290  JA5AQC RZ4AT LN28
201330  -1 2290  JA2JNA RZ4AT LN28 (x2)
201700  -8 2290  JF1UVJ RZ4AT R-14 (x2)
201800  -3 2290  JR1CFG RZ4AT LN28 (x3)
201930  -6 2289  JA6LCJ RZ4AT LN28
202000  -7 2289  JH1APZ RZ4AT LN28
202030  -7 2289  JR1AIB RZ4AT LN28 (x2)
202130  -6 2290  JA1XEC RZ4AT LN28 (x2)
202315  -8 2289  RD0L RZ4AT LN28

40m

UTC    dB Audio  Message
203100 -17 2199  UA7XA RZ4AT LN28
203130 -11 2199  RN6MA RZ4AT LN28
204600  -8 2174  JG4NNS RZ4AT LN28
204700 -14 2174  CQ JA RZ4AT LN28
204730 -10 2174  UN7PPV RZ4AT R-11 (x2)
204830 -10 2174  CQ JA RZ4AT LN28 (x4)
205200  -9 2174  JA5MHD RZ4AT LN28 (x2)
201430  -1 2373  RZ4AT RO2E/P RR73
162415 -13 2148  DA125RH RZ4AT LN28 (x2)

20m

UTC    dB Audio  Message
113345 -10 1683  UA0JBY RZ4AT 73
115430 -12 1683  UA0LHS RZ4AT LN28 (x4)
161545 -13 2515  UA0LQE RZ4AT LN28 (x10)

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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