UD0O — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Asiatic Russia Most frequent locator attributed to this token: OO20

Receiver-side FT8 activity involving UD0O, decoded by SO8OO in southeastern Poland. 32 FT8 messages attributed to this token as transmitter, on 160m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-09-07.

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 32 FT8 messages attributed to UD0O as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (84%), followed by 160 m (16%). Several six-hour UTC windows tied for the largest share (75%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's moderate S/N range (66%); the estimated median was -12 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

160m · 5 20m · 27

First attributed message: 2026-06-10
Last attributed message: 2026-09-07 18:45 UTC

Observed FT8 message patterns

Attributed sample: 32 messages
Active dates: 7 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -22 to -8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 21, strong (≥ -8 dB) 4.

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 UD0O in decoded directed-looking exchanges:

R2EA · European Russia R7OQ · European Russia 4X5MZ · Israel

Most frequent locator attributed to UD0O

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: OO20 · 4 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 5,591 km (approx.)
Last such locator decoded: 2026-09-07 18:45 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	UD0O S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-13 14:18	40m	- / -	RZ3DW	+12 / -	2	Partial capture
09-07 18:58	160m	- / -9	RK4FH	+5 / -	7	Partial capture
09-07 18:56	160m	- / -	SP6LUV	+12 / -	6	Partial capture
09-07 18:56	160m	- / -2	UA4HJ	-14 / -	2	Partial capture
09-07 18:56	160m	- / -	YL3CW	+4 / -	5	Partial capture
09-07 18:55	160m	- / -	UA3ZUX	0 / -	4	Partial capture
09-07 18:55	160m	- / -	RA1AGX	-4 / -	4	Partial capture
09-07 18:48	160m	- / -	RA6YDX	-16 / -	2	Partial capture
09-07 18:48	160m	- / -	UB7K	+4 / -	3	Partial capture
09-07 18:47	160m	- / -	SP6LUV	+15 / -	6	Partial capture
09-07 18:45	160m	- / -	RO7A	-3 / -	5	Partial capture
09-07 18:45	160m	- / -5	R2EA	0 / -	2	✓ Closing fragment
09-07 18:45	160m	- / -6	RY3D	+4 / -	7	Partial capture
09-07 18:45	160m	- / +1	UA4HJ	-12 / -	5	Partial capture
09-05 20:01	160m	- / -	RL3F	-16 / -	2	Partial capture
09-05 20:01	160m	- / -	RO7A	-4 / -	3	Partial capture
09-05 20:00	160m	- / -	UA1OMS	-4 / -	3	Partial capture
09-05 20:00	160m	- / -9	R5RC	0 / -	5	Partial capture
09-05 20:00	160m	- / -	RG5G	-10 / -	2	Partial capture
09-05 20:00	160m	- / -	RX6CC	-16 / -	2	Partial capture
09-05 19:58	160m	-22 / -	R9CS/P	- / -11	3	Partial capture
09-05 19:54	160m	- / -	RO7A	-13 / -	4	Partial capture
09-05 19:53	160m	- / -	RL3F	-17 / -	4	Partial capture
09-05 19:53	160m	- / -	RN1CW	-15 / -	7	Partial capture
09-05 19:53	160m	-23 / -11	R7OQ	-12 / -20	3	✓ Full exchange observed
07-20 13:39	20m	- / -	F4HSB	-23 / -	3	Partial capture
07-20 13:33	20m	- / -	4X5MZ	-4 / -	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
133800 -13  993  UD0O RU4I -16
141845 +14 2795  UD0O RZ3DW KO84 (x2)

160m

UTC    dB Audio  Message
185700 +13 1498  UD0O SP6LUV JO90
185730  +9 2382  UD0O YL3CW KO36
185730 +16 1498  UD0O SP6LUV JO90
185800  +6 2382  UD0O YL3CW KO36
185800  -1 1301  UD0O UA3ZUX KO90
185800 +14 1498  UD0O SP6LUV JO90
185800  +0 2753  UD0O RK4FH -09
185830 +13 1498  UD0O SP6LUV JO90
185830  +1 2753  UD0O RK4FH -09
185900 +13 1498  UD0O SP6LUV JO90
185900  +6 2752  UD0O RK4FH -09 (x5)

20m

UTC    dB Audio  Message
151245  -5  621  UD0O RW4F LO23
133345  -2  577  UD0O 4X5MZ KM71 (x3)
133915 -24 1730  UD0O F4HSB JN37 (x3)
131200 -10  574  UD0O DH2YBG JO43 (x2)

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