UA4COA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO42

Receiver-side FT8 activity involving UA4COA, decoded by SO8OO in southeastern Poland. 747 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 21 UTC dates in the available aggregate history. Observed between 2026-06-20 and 2026-08-24.

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 747 FT8 messages attributed to UA4COA as the transmitting token by decoded message structure across 21 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (87%), followed by 40 m (8%) and 80 m (5%). Most decodes (55%) fell within the six-hour window 14:00-20:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (71%); the estimated median was -5 dB.

Overview

747

Messages attributed

UTC dates decoded

Active 15-min windows

-5 dB

Estimated median S/N

Bands

80m · 35 40m · 59 20m · 653

First attributed message: 2026-06-20
Last attributed message: 2026-08-24 17:33 UTC

Observed FT8 message patterns

Attributed sample: 747 messages
Active dates: 21 UTC dates
Estimated median S/N: -5 dB
Estimated 10th-90th percentile: -12.1 to +4.6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 23, moderate (-15 to -9 dB) 194, strong (≥ -8 dB) 530.

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 UA4COA in decoded directed-looking exchanges:

F4HSB · France ×2 G6LEE · England ×2 RA6FSV · European Russia ×2 S59A · Slovenia ×2 UB3DLM · European Russia LB2YJ · Norway RA6ZD · European Russia G6ZRV · England SV1OML · Greece RZ4FWA · European Russia DL6EL · Fed. Rep. of Germany R3ZP · European Russia

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 UA4COA

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: LO42 · 399 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,905 km (approx.)
Last such locator decoded: 2026-08-24 17:32 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	UA4COA S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-31 08:23	40m	- / -6	ES2AJ	-13 / -	3	✓ Closing fragment
08-24 17:30	80m	+14 / -	JG3TRB	-12 / -18	4	✓ Closing observed
08-24 17:30	80m	+6 / +3	UA4QK	+3 / -	7	✓ Full exchange observed
08-24 17:28	80m	+9 / -6	RC7LX	-14 / -11	4	✓ Full exchange observed
08-24 17:27	80m	+14 / -	RQ3D	- / -9	2	Partial capture
08-24 17:27	80m	- / -	JG3TRB	-18 / -	2	Partial capture
08-24 17:25	80m	+7 / -7	S59A	+12 / -9	4	✓ Full exchange observed
08-24 16:48	40m	+4 / +2	RU3T	0 / +4	4	✓ Full exchange observed
08-24 16:46	40m	+4 / +6	R2APC	-8 / +6	5	✓ Full exchange observed
08-23 14:10	20m	-8 / +9	G6ZRV	+5 / -3	5	✓ Full exchange observed
08-23 14:08	20m	-11 / -	PD0JHM	- / -2	2	Partial capture
08-23 14:00	20m	-4 / -	DL1R	-7 / +4	21	Partial capture
08-23 13:58	20m	- / -15	CT1EGA	-3 / -	4	Partial capture
08-23 13:56	20m	-10 / -	BH2WTV	- / -2	4	Partial capture
08-22 17:01	40m	-8 / 0	RZ7RCP	-12 / -	3	✓ Closing observed
08-22 16:55	40m	- / +2	RD7LC	0 / -	2	✓ Closing fragment
08-22 16:52	40m	-8 / -	UA3WG	- / -2	2	Partial capture
08-22 16:49	40m	-10 / -	R9OON	- / -11	2	Partial capture
08-22 16:47	40m	-10 / -	R6XW	- / -9	3	Partial capture
08-22 16:45	40m	-8 / -	RT9YO	- / -11	2	Partial capture
08-22 16:44	40m	-9 / +1	RX3DQ	-8 / -	3	✓ Closing observed
08-22 16:42	40m	-10 / +4	R5ACQ	-4 / -4	6	✓ Full exchange observed
08-22 16:42	40m	-12 / -15	RZ6AKF	+3 / +4	4	✓ Full exchange observed
08-22 16:40	40m	- / -	PA2RO	+1 / -	3	Partial capture
08-19 11:24	20m	+2 / -	RD3ADW	- / 0	2	Partial capture
08-19 11:21	20m	0 / -	EW6CB	- / -8	2	Partial capture
08-19 11:20	20m	0 / -	RD1A	- / -	2	✓ Closing fragment
08-19 11:16	20m	-1 / -	OK1DVN	- / -12	5	Partial capture
08-19 11:15	20m	-10 / -3	F4HSB	-19 / -14	5	✓ Full exchange observed
08-19 11:13	20m	- / -	UA9CK	-18 / -	2	Partial capture
08-19 11:11	20m	-2 / -	F6BHK	- / -10	2	Partial capture
08-19 11:09	20m	-7 / -	TA3NK	- / -7	2	Partial capture
08-19 11:05	20m	-8 / -	R1IK	- / -11	2	Partial capture
08-19 11:04	20m	-5 / -	F1IQH	- / -15	2	Partial capture
08-19 11:03	20m	-6 / -	RK6AH	-24 / -2	3	✓ Closing observed
08-15 07:40	20m	+4 / -	SP9SOS	- / -3	4	✓ Closing fragment
08-15 07:38	20m	+6 / -	RW0AE	- / -23	2	✓ Closing fragment
08-15 07:33	20m	+1 / -	OE8PIT	-16 / -19	5	Partial capture
08-15 07:27	20m	+3 / -	F4IIX	0 / -14	5	✓ Closing observed
08-15 07:19	20m	+2 / -	OK2PHI	- / -2	4	Partial capture
08-15 07:15	20m	-1 / -17	TA3NK	-12 / -11	6	Partial capture
08-15 07:11	20m	-2 / -	OH3MB	- / -	2	Partial capture
08-15 07:07	20m	0 / -	F4EDB	-12 / +1	4	✓ Closing observed
08-15 07:04	20m	-4 / +6	IZ5BLN	-6 / -14	9	✓ Full exchange observed
08-15 07:00	20m	0 / -	IK2ECC	-10 / -21	7	✓ Closing observed
08-15 06:53	20m	+2 / -	K5QXJ	- / -16	3	Partial capture
08-15 06:50	20m	+9 / -12	R4FDD	+3 / -16	5	Partial capture
08-15 06:43	20m	- / +9	EA6UE	-13 / -	4	✓ Closing fragment
08-15 06:39	20m	-8 / -	F5GPE	- / -9	2	Partial capture
08-15 06:36	20m	- / -6	IK2SND	-8 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
164915  +5  532  CQ UA4COA LO42 (x8)
171500  +6  458  UA4COA R4FCK LO23
171500  -9 2446  UA4COA R2APC KO85
171530 -14 2180  UA4COA UA3FH KO85
171630  +0  458  UA4COA UA4WCS LO66
082300 -11 1953  UA4COA ES2AJ KO29 (x3)

80m

UTC    dB Audio  Message
172915  +7  422  RC7LX UA4COA 73
172945  +5  422  CQ UA4COA LO42 (x2)
173030  +4  682  UA4COA UA4QK LO45
173045 +13  423  JG3TRB UA4COA -18 (x3)
173200  +4  682  UA4COA UA4QK LO45
173200 -12  341  UA4COA JG3TRB 73
173215  +5  422  CQ UA4COA LO42
173230  +5  682  UA4COA UA4QK LO45
173245  +6  422  UA4QK UA4COA +14
173300  +1  682  UA4COA UA4QK R+03
173315  +7  423  UA4QK UA4COA RRR
173330  +3  682  UA4COA UA4QK 73

20m

UTC    dB Audio  Message
140445  -6 2094  DL1R UA4COA +08 (x3)
140615  -3 2094  CQ UA4COA LO42 (x2)
140815 -13 2094  PD0JHM UA4COA -02 (x2)
140915  -8 2094  CQ UA4COA LO42 (x2)
141030  +3 1571  UA4COA G6ZRV JO02
141045  -5 2094  G6ZRV UA4COA -03
141100  +5 1571  UA4COA G6ZRV R+09
141115 -11 2093  G6ZRV UA4COA RRR
141130  +6 1571  UA4COA G6ZRV 73
141745  -1 2093  CQ UA4COA LO42

10m

UTC    dB Audio  Message
131115  -7 1178  UA4COA PA3BRB JO32 (x5)
131915 -18 1052  UA4COA RA6AR KN93
132915 -11  663  UA4COA PF1B JO22 (x2)
163700 -12  884  UA4COA PD0CIF R-12 (x2)
164100 -11  884  UA4COA ON5JDB 73
065830 -24 1534  UA4COA UI5A R-14
070700 -13  982  UA4COA R6TA LN13 (x3)

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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee