DK5US — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO31

Receiver-side FT8 activity involving DK5US, decoded by SO8OO in southeastern Poland. 331 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-23 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 331 FT8 messages attributed to DK5US as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (52%), followed by 20 m (48%). Most decodes (100%) fell within the six-hour window 11:00-17:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (63%); the estimated median was -7 dB.

Overview

331

Messages attributed

UTC dates decoded

Active 15-min windows

-7 dB

Estimated median S/N

Bands

40m · 171 20m · 160

First attributed message: 2026-08-23
Last attributed message: 2026-08-30 16:52 UTC

Observed FT8 message patterns

Attributed sample: 331 messages
Active dates: 3 UTC dates
Estimated median S/N: -7 dB
Estimated 10th-90th percentile: -12 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 115, strong (≥ -8 dB) 210.

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 DK5US in decoded directed-looking exchanges:

IK2ZJR · Italy ×2 IZ4AIF · Italy ×2 R3IX · European Russia ×2 OK1FED · Czech Republic ×2 EA3HMM · Spain HF5A · Poland IK1MJK/P · Italy IN3LHF · Italy IQ4JO · Italy LZ3CB · Bulgaria MW0YAE · Wales OH2GT · Finland

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 DK5US

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: JO31 · 215 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,054 km (approx.)
Last such locator decoded: 2026-08-30 16:51 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	DK5US S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-30 16:51	40m	-4 / -	IZ4AIF	+3 / -1	5	✓ Full exchange observed
08-30 16:49	40m	- / -	IK2ZJR	+7 / -	8	Partial capture
08-30 16:47	40m	-6 / -11	UT4VL	+2 / -1	5	✓ Full exchange observed
08-30 16:41	40m	-2 / -	M8JJS	- / -9	5	✓ Closing fragment
08-30 16:33	40m	-6 / -	F4JUG	- / -2	8	✓ Closing fragment
08-30 16:24	40m	- / -	DH5NC	+4 / -	2	Partial capture
08-30 16:21	40m	-3 / -19	PA3BMB	-6 / -	4	✓ Closing observed
08-30 16:13	40m	- / -10	SP9WAZ	+1 / -	3	✓ Closing fragment
08-30 16:07	40m	-3 / -	DL1OH	- / -11	2	✓ Closing fragment
08-30 15:58	40m	-12 / +3	DK7UY	-3 / -3	5	✓ Full exchange observed
08-30 14:42	40m	-8 / -2	OK8DCC	-3 / -14	4	✓ Full exchange observed
08-30 14:40	40m	-5 / -	F5MXH	-10 / -1	4	✓ Closing observed
08-30 14:30	40m	- / +1	DL6EL	-11 / -	3	✓ Closing fragment
08-30 14:25	40m	-12 / +1	DF0JEN	-4 / -	4	✓ Closing observed
08-30 14:19	40m	- / +5	OK1FED	+4 / -	3	✓ Closing fragment
08-30 14:16	40m	-8 / -2	PE1EXQ	-11 / -10	3	Partial capture
08-30 14:14	40m	-9 / +7	DM1RG	-3 / -5	4	✓ Full exchange observed
08-30 14:09	40m	-14 / +6	DL1EDR	-3 / -5	4	✓ Full exchange observed
08-30 14:02	40m	-11 / -	DL3LBK	-19 / -4	4	✓ Full exchange observed
08-30 13:28	40m	- / +10	DA0RR	-4 / -	3	✓ Closing fragment
08-30 13:26	40m	-11 / -10	DL2MIJ	-8 / -13	6	✓ Full exchange observed
08-30 13:19	40m	- / -5	HA2NW	-17 / -	2	Partial capture
08-30 13:10	40m	-10 / -15	DK4VF	-3 / -	4	✓ Closing observed
08-30 13:02	40m	-8 / -13	HA3HZ	-8 / -6	12	✓ Full exchange observed
08-30 12:58	40m	- / -13	DL7SLB	-3 / -	2	Partial capture
08-30 12:55	40m	-7 / -4	SQ9BDB	-8 / -9	5	✓ Full exchange observed
08-30 12:54	40m	-8 / -7	DL7UKM	+8 / -	3	✓ Closing observed
08-30 12:49	40m	-8 / -11	SP3DVO	-17 / -11	4	✓ Full exchange observed
08-30 12:46	40m	-8 / -	PD4HT	-10 / -	2	✓ Closing observed
08-30 12:39	40m	-8 / -9	SQ9BDB	-7 / -6	11	Partial capture
08-30 12:37	40m	- / -	DL7DL	-6 / -	3	✓ Closing fragment
08-30 12:25	40m	-10 / -8	DJ0MAB	-8 / -	3	✓ Closing observed
08-29 16:25	20m	- / -	DK4RH	-12 / -	2	Partial capture
08-29 16:17	20m	-13 / -	RU3QR	- / -18	2	Partial capture
08-29 16:14	20m	- / -	BI4JJO	-8 / -	5	Partial capture
08-29 14:20	20m	- / -	F5OYA/P	-2 / -	23	Partial capture
08-29 13:04	20m	- / -11	EA3HMM	+4 / -	3	✓ Closing fragment
08-23 16:35	20m	- / -6	RY7G	+15 / -	3	✓ Closing fragment
08-23 16:13	20m	-14 / -9	R2WT	-11 / -6	4	✓ Closing observed
08-23 16:11	20m	-16 / -3	IQ4JO	0 / -8	3	✓ Full exchange observed
08-23 15:54	20m	- / -14	IK1MJK/P	+4 / -	5	✓ Closing fragment
08-23 15:36	20m	- / -11	RU3QR	-11 / -	11	Partial capture
08-23 15:11	20m	-14 / -	RX1AB	- / -3	5	✓ Closing fragment
08-23 15:10	20m	- / -	IQ4JO	+3 / -	3	Partial capture
08-23 14:58	20m	-4 / -	R3IX	-17 / -	4	✓ Closing observed
08-23 14:55	20m	-4 / -	HF5A	- / -8	4	✓ Closing fragment
08-23 14:10	20m	-8 / -	SM2SCK	- / -19	2	✓ Closing fragment
08-23 14:03	20m	-7 / -	MW0YAE	- / -	2	✓ Closing fragment
08-23 13:58	20m	- / -	RA6HN	-9 / -	7	Partial capture
08-23 13:57	20m	-8 / -6	R7OV	-1 / -17	14	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
164930 +10 2759  DK5US IK2ZJR JN45 (x3)
165030  -4 2685  CQ DK5US JO31
165100  +5 2759  DK5US IK2ZJR JN45
165100  -2 2685  CQ DK5US JO31
165115  +2 2685  DK5US IZ4AIF JN54
165130  -2 2685  IZ4AIF DK5US -01
165130  +7 2759  DK5US IK2ZJR JN45
165145  +4 2685  DK5US IZ4AIF R+11
165200  -5 2685  IZ4AIF DK5US RR73
165200  +8 2759  DK5US IK2ZJR JN45
165215  +2 2685  DK5US IZ4AIF 73
165230  +5 2759  DK5US IK2ZJR JN45 (x2)

20m

UTC    dB Audio  Message
162615 -10 2715  DK5US DK4RH JO31
162630  -7 2715  CQ DK5US JO31 (x7)
163100 -12 2795  R7OV DK5US RR73
163145 -13 2796  CQ DK5US JO31 (x2)
163315  -9 2795  RA6LHU DK5US -14
163915  +1 2796  CQ DK5US JO31 (x2)
164130 -16 2304  DK5US BG7BMG -22

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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