KP4AA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Puerto Rico Most frequent locator attributed to this token: FK68

Receiver-side FT8 activity involving KP4AA, decoded by SO8OO in southeastern Poland. 469 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 20 UTC dates in the available aggregate history. Observed between 2026-08-19 and 2026-09-12.

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 469 FT8 messages attributed to KP4AA as the transmitting token by decoded message structure across 20 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (91%), followed by 40 m (4%) and 20 m (4%). Most decodes (98%) fell within the six-hour window 21:00-03:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (64%); the estimated median was -18 dB.

Overview

469

Messages attributed

UTC dates decoded

Active 15-min windows

-18 dB

Estimated median S/N

Bands

160m · 1 80m · 426 40m · 21 20m · 21

First attributed message: 2026-08-19
Last attributed message: 2026-09-12 23:37 UTC

Observed FT8 message patterns

Attributed sample: 469 messages
Active dates: 20 UTC dates
Estimated median S/N: -18 dB
Estimated 10th-90th percentile: -24 to -11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 300, moderate (-15 to -9 dB) 144, strong (≥ -8 dB) 25.

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 KP4AA in decoded directed-looking exchanges:

SM7HZK · Sweden ×3 RA3WY · European Russia ×2 EA1AIQ · Spain ×2 Z62NS · Republic of Kosovo ×2 TF3VS · Iceland ×2 SV8JE · Greece ×2 DH5BM · Fed. Rep. of Germany ×2 SP3BZU · Poland ×2 OH1MLZ · Finland ×2 HB9CXZ · Switzerland ×2 DM7AK · Fed. Rep. of Germany ×2 SM2LIY · Sweden ×2

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 KP4AA

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: FK68 · 164 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,360 km (approx.)
Last such locator decoded: 2026-09-12 23:31 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	KP4AA S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-12 23:38	80m	- / -	DO6LE	-2 / -	6	Partial capture
09-12 23:38	80m	- / -	G8OO	-16 / -	9	Partial capture
09-12 23:37	80m	- / -5	SQ9DJQ	+1 / -	5	Partial capture
09-12 23:34	80m	- / -16	DO1DX	-4 / -	10	Partial capture
09-12 23:33	80m	-13 / -13	LA9JKA	-16 / -15	14	✓ Full exchange observed
09-12 23:32	80m	-13 / -	SA6KLO	+5 / -18	4	✓ Closing observed
09-12 23:32	80m	- / -16	R2EA	-3 / -	3	Partial capture
09-12 23:32	80m	- / -8	SQ9DJQ	+1 / -	4	Partial capture
09-12 23:30	80m	- / -	9A4ZM	+2 / -	3	Partial capture
09-12 23:30	80m	-12 / -2	LA7DFA	-9 / 0	5	✓ Full exchange observed
09-12 23:30	80m	- / -	SQ8SV	-8 / -	5	Partial capture
09-12 23:28	80m	-12 / -	UG4L	-11 / -18	3	✓ Closing observed
09-12 23:28	80m	- / -	DO1WGK	-6 / -	17	Partial capture
09-12 23:28	80m	- / -	ON4MAP	-23 / -	4	Partial capture
09-12 23:27	80m	- / -	DO2XU	-11 / -	15	Partial capture
09-12 23:27	80m	- / -	LZ2VQ	-9 / -	3	Partial capture
09-12 23:27	80m	-10 / -3	ON6JN	-13 / -10	5	✓ Full exchange observed
09-12 23:27	80m	- / -	YO6LM	+5 / -	7	Partial capture
09-12 23:10	160m	- / -20	DF7EF	+20 / -	8	Partial capture
09-12 23:05	160m	- / -	DF7EF	+19 / -	5	Partial capture
09-12 23:04	160m	- / -	HB9HFN	+4 / -	5	Partial capture
09-12 22:58	80m	- / -11	OK1UOZ	-1 / -	3	✓ Closing fragment
09-12 22:58	80m	- / -	YO6LM	0 / -	2	Partial capture
09-12 22:53	80m	- / -8	OZ1LGJ	-10 / -	4	✓ Closing fragment
09-12 22:51	80m	- / -13	SV8JE	-1 / -	7	✓ Closing fragment
09-12 22:49	80m	- / -13	RU3SD	-21 / -	9	✓ Closing fragment
09-12 22:46	80m	- / -15	IW0RGN	+7 / -	4	Partial capture
09-12 22:45	80m	- / -	OK1UOZ	+4 / -	9	Partial capture
09-12 22:45	80m	- / -	DL2YMG	-14 / -	2	Partial capture
09-12 22:24	80m	- / -15	EA1KCN	-6 / -	2	Partial capture
09-12 22:22	80m	-18 / -18	7X5CY	-2 / -	3	Partial capture
09-12 01:18	160m	- / -	LA7DFA	-6 / -	2	Partial capture
09-12 01:17	160m	- / -	LA0FA	-6 / -	5	Partial capture
09-12 01:12	160m	- / -	OM7CF	+5 / -	3	Partial capture
09-12 01:08	160m	- / -12	LA6YEA	+2 / -	5	✓ Closing fragment
09-11 22:59	160m	- / -19	OH4SS	+8 / -	12	✓ Closing fragment
09-11 22:53	160m	- / -	OH4SS	+8 / -	2	Partial capture
09-11 22:51	160m	- / -17	G7RAU	-18 / -	3	✓ Closing fragment
09-11 22:46	160m	- / -10	SM2LIY	-2 / -	6	✓ Closing fragment
09-11 22:39	80m	- / -	SA6LDQ	-10 / -	2	Partial capture
09-11 22:39	80m	- / -18	PE2JMR	-7 / -	4	✓ Closing fragment
09-11 22:33	80m	- / -12	SP4WJ	-2 / -	15	✓ Closing fragment
09-11 22:32	80m	- / -24	OH3GKA	+2 / -	2	✓ Closing fragment
09-11 22:32	80m	- / -17	SP5ES	+12 / -	3	✓ Closing fragment
09-11 22:31	80m	- / -	F/PA1CM	-12 / -	2	Partial capture
09-11 22:31	80m	- / -17	SM2LIY	+8 / -	2	✓ Closing fragment
09-11 22:29	80m	- / -18	DA6EE	-8 / -	2	Partial capture
09-11 22:26	80m	- / -15	IZ8ESX	-8 / -	2	✓ Closing fragment
09-11 22:26	80m	- / -10	SP1NL	+12 / -	4	✓ Closing fragment
09-11 22:26	80m	- / -	OH3GKA	-1 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
233900  +1 2733  KP4AA SQ9DJQ -05
233900  -7 2293  KP4AA IZ0MIT JN61
233930  -1 1872  KP4AA DO6LE JN59
233930 -13 1970  KP4AA G8OO JO02
234000  -6 1794  KP4AA DO1WGK JN49
234000  -2 1873  KP4AA DO6LE JN59
234000 -21 1970  KP4AA G8OO JO02
234030  -1 1873  KP4AA DO6LE JN59
234030 -14 1970  KP4AA G8OO JO02
234100  -5 1872  KP4AA DO6LE JN59
234100 -16 1970  KP4AA G8OO JO02 (x4)
235030  -5 1794  KP4AA DO1WGK JN49

160m

UTC    dB Audio  Message
230500  +4 2559  KP4AA HB9HFN JN36
230530 +18  440  KP4AA DF7EF JO30
230530  +3 2559  KP4AA HB9HFN JN36
230600 +18  440  KP4AA DF7EF JO30
230600  +2 2559  KP4AA HB9HFN JN36
230630 +19  440  KP4AA DF7EF JO30 (x10)

40m

UTC    dB Audio  Message
215915  -7 2139  KP4AA RA3ZH KO81
215915  -5  746  KP4AA IW9FRA JM68
215915  +9  487  KP4AA IU0VYT JN61
215945  -3 2139  KP4AA RA3ZH KO81
215945  -4  746  KP4AA IW9FRA JM68
215945  +7  487  KP4AA IU0VYT JN61 (x2)
220015 -10  396  KP4AA Z33PB -09
220045 +11  487  KP4AA IU0VYT JN61
220045  -5  397  KP4AA Z33PB -09 (x2)
220115  +5  487  KP4AA IU0VYT JN61
001515  -4 1805  <...> KP4AA FK68 (x3)

20m

UTC    dB Audio  Message
013115  -4 1828  Z62NS KP4AA FK68 (x3)
013230 -10  728  KP4AA Z62NS RR73
013245  -2  728  Z62NS KP4AA 73
013345  +4  728  VU2ORO KP4AA R-13
203900 -17 1869  OM3LU KP4AA R+02
204015 -14 1866  KP4AA EA7L -06 (x3)
204430 -17 1846  OK2CNI KP4AA FK68
204800 -16 1844  9A4ZM KP4AA -09
204930 -13 1845  SP4TKA KP4AA -18 (x3)

10m

UTC    dB Audio  Message
184930  -8 1587  KP4AA ON1AEY JO11 (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.

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