WP4UV — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Puerto Rico Most frequent locator attributed to this token: FK78

Receiver-side FT8 activity involving WP4UV, decoded by SO8OO in southeastern Poland. 35 FT8 messages attributed to this token as transmitter, on 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-08-30.

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 35 FT8 messages attributed to WP4UV as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). 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 weak S/N range (60%); the estimated median was -17 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

20m · 35

First attributed message: 2026-06-09
Last attributed message: 2026-08-30 21:46 UTC

Observed FT8 message patterns

Attributed sample: 35 messages
Active dates: 6 UTC dates
Estimated median S/N: -17 dB
Estimated 10th-90th percentile: -22 to -11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 21, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 1.

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 WP4UV in decoded directed-looking exchanges:

CR2WWA · Azores ×2 M0LAD · England ×2 4L7T · Georgia DL2FX · Fed. Rep. of Germany G1CEC · England IK4LZH · Italy IU5AWQ · Italy KB3Z · United States LZ1KU · Bulgaria R7WA · European Russia R9DZ · Asiatic Russia R9FAI · European Russia

Most frequent locator attributed to WP4UV

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: FK78 · 21 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,219 km (approx.)
Last such locator decoded: 2026-08-30 21:46 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	WP4UV S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-30 21:46	20m	-10 / -	EA5INF	- / -	2	Partial capture
08-30 21:29	20m	-10 / -	M0LAD	- / -	2	✓ Closing fragment
08-30 21:15	20m	- / -14	G0OSK	+16 / -	4	Partial capture
08-30 21:14	20m	- / -12	4L7T	+9 / -	3	Partial capture
08-05 00:41	20m	- / -	DF7EE	-18 / -	2	Partial capture
08-05 00:28	20m	- / -18	DL2FX	-13 / -	3	Partial capture
08-04 23:52	20m	- / -10	IK4LZH	-6 / -	4	Partial capture
08-02 01:51	20m	- / +1	RL9LR	-21 / -	4	✓ Closing fragment
08-02 01:16	20m	- / -5	UA9FLK	-6 / -	4	✓ Closing fragment
07-31 23:06	20m	- / -	UA8Q	-8 / -	3	Partial capture
07-23 01:42	20m	- / -9	LZ1KU	0 / -	2	Partial capture
07-21 01:01	20m	- / -15	IK4LZH	-7 / -	5	✓ Closing fragment
07-20 23:51	20m	- / -10	KB3Z	-12 / -	4	✓ Closing fragment
07-14 23:44	20m	- / -	IU5AWQ	-22 / -	2	✓ Closing fragment
07-12 02:50	20m	- / -19	R9FAI	-1 / -	5	✓ Closing fragment
07-04 02:06	20m	- / -17	R7WA	-6 / -	5	✓ Closing fragment
07-03 22:02	20m	-18 / -	KP4WWA	- / -	8	Partial capture
07-03 21:44	20m	- / -11	CR2WWA	-12 / -	2	✓ Closing fragment
06-30 01:37	20m	- / -14	TM8WWA	-10 / -	2	Partial capture
06-29 22:13	20m	- / -	II2WWA	-3 / -	5	Partial capture
06-29 21:59	20m	- / -17	II2WWA	-9 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
211800 -11  317  CQ WP4UV FK78
211830 -15  317  KC8RFE WP4UV +21
212030 -13  317  CQ WP4UV FK78
212230 -14  265  VE2TK WP4UV FK78
212530 -17  264  M0LAD WP4UV +15
212800 -13  265  CQ WP4UV FK78
212900  -8  265  M0LAD WP4UV RR73 (x2)
213200 -15  265  CQ WP4UV FK78                         a1 (x4)
213345 -11  281  WP4UV CT2HSM IN50
214600 -10  278  EA5INF WP4UV FK78 (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.

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