DL1UDO — 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 DL1UDO, decoded by SO8OO in southeastern Poland. 31,394 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 104 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-20.

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 31,394 FT8 messages attributed to DL1UDO as the transmitting token by decoded message structure across 104 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (39%), followed by 80 m (26%) and 60 m (17%). The busiest six-hour window was 18:00-00:00 UTC, containing 35% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8.5 dB.

Overview

31,394

Messages attributed

104

UTC dates decoded

3,763

Active 15-min windows

-8.5 dB

Estimated median S/N

Bands

80m · 8,299 60m · 5,358 40m · 4,980 20m · 12,335 10m · 422

First attributed message: 2026-06-06
Last attributed message: 2026-09-20 05:42 UTC

Observed FT8 message patterns

Attributed sample: 31,394 messages
Active dates: 104 UTC dates
Estimated median S/N: -8.5 dB
Estimated 10th-90th percentile: -19 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6,465, moderate (-15 to -9 dB) 9,246, strong (≥ -8 dB) 15,683.

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 DL1UDO in decoded directed-looking exchanges:

IK4LZH · Italy ×11 CT2GQA · Portugal ×11 HA3GX · Hungary ×8 M8FQT · England ×8 ON4MAP · Belgium ×8 ON1BH · Belgium ×8 OE5WRO · Austria ×6 ON6CQ · Belgium ×6 KZ8C · United States ×6 II3WWA · Italy ×5 M7KSV · England ×5 R5AV · European Russia ×5

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 DL1UDO

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 · 24,564 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,054 km (approx.)
Last such locator decoded: 2026-09-20 05:42 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	DL1UDO S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 05:41	80m	-14 / -	HI8JCD	- / -	3	Partial capture
09-20 05:12	80m	-10 / -	M7NQB	- / -	4	Partial capture
09-20 05:09	80m	- / -	OK2BXD	-2 / -	2	Partial capture
09-20 04:48	80m	-6 / -	DF8IJ	- / +3	3	✓ Closing fragment
09-20 04:43	80m	-5 / -	WB4HAM	- / -21	8	Partial capture
09-20 04:41	80m	-8 / -	K9BAW	- / -24	4	✓ Closing fragment
09-20 04:34	60m	-7 / -	S51XA	- / -	4	Partial capture
09-20 04:14	80m	-1 / -	HI8JCD	- / -	3	Partial capture
09-20 04:12	80m	-4 / -	F5MPN	- / -	4	Partial capture
09-20 04:10	80m	+3 / -	F4HQL	-3 / +7	5	✓ Full exchange observed
09-20 04:01	60m	-6 / -	IU5SCG	+7 / +3	7	✓ Full exchange observed
09-20 03:55	40m	-6 / -	W3L	- / -	2	Partial capture
09-20 03:53	40m	-4 / -	HK3VHZ	- / -	3	Partial capture
09-20 03:33	80m	- / -16	HI8R	-9 / -	2	✓ Closing fragment
09-20 03:19	40m	-4 / -	KJ5PTH	- / -	3	Partial capture
09-20 03:17	40m	-4 / -	IU5SCG	- / -	3	Partial capture
09-20 03:15	40m	-6 / -	W3L	- / -	2	Partial capture
09-20 03:14	40m	-8 / -	EA8DQE	- / -	2	Partial capture
09-20 02:12	60m	-2 / -	VA2CZ	- / -14	2	✓ Closing fragment
09-20 01:53	40m	- / -15	UB4CJS	-9 / -	3	✓ Closing fragment
09-20 01:32	60m	-4 / -	AD9DU	- / -	3	Partial capture
09-20 01:30	60m	-2 / -	KT5OT	- / -	3	Partial capture
09-20 01:29	60m	-4 / -	VE3FF	- / -10	2	✓ Closing fragment
09-20 00:58	80m	-4 / -	R4FDD	-4 / -17	3	✓ Closing observed
09-20 00:39	40m	- / -12	EA5GKL	-12 / -	2	✓ Closing fragment
09-20 00:11	60m	-2 / -	IZ3ZOG	- / -	4	Partial capture
09-20 00:09	60m	-4 / -	EA3IBY	- / -	3	Partial capture
09-20 00:08	60m	0 / -	W3AAB	- / -24	3	✓ Closing fragment
09-20 00:04	60m	-3 / -	LZ2BC	-22 / -24	6	Partial capture
09-19 23:54	40m	+1 / -	WV2B	- / -	2	Partial capture
09-19 23:52	40m	+1 / -	EA3IBY	- / -	3	Partial capture
09-19 23:22	60m	-5 / +4	PA6OOI	0 / -	2	Partial capture
09-19 23:17	40m	+2 / -	K8DXR	- / -	2	Partial capture
09-19 23:15	40m	+2 / -	WV2B	- / -	3	Partial capture
09-19 23:03	40m	-3 / -	N4BWW	- / -	3	Partial capture
09-19 23:01	40m	0 / -	KA2BUG	- / -15	3	Partial capture
09-19 22:59	40m	- / -	RV6G/P	-16 / -	2	Partial capture
09-19 22:30	60m	-3 / -11	J48S	0 / -9	5	✓ Full exchange observed
09-19 22:27	60m	-7 / +4	F1PBZ	+2 / +4	4	✓ Full exchange observed
09-19 22:23	40m	+3 / -	W1JJC	- / -	3	Partial capture
09-19 22:21	40m	+2 / -	GM3AND	- / -	4	Partial capture
09-19 22:19	40m	+2 / -	N4NF	- / -	4	Partial capture
09-19 22:17	40m	0 / -	YO2UKG	- / -	3	Partial capture
09-19 21:48	60m	-6 / -12	J48S	+3 / -	6	Partial capture
09-19 21:45	60m	-4 / -	EA4HSF	- / -12	5	✓ Closing fragment
09-19 21:38	40m	+6 / -	UB3ADO/P	- / -22	2	Partial capture
09-19 21:36	40m	+4 / -	F4CVQ	- / -	2	Partial capture
09-19 21:33	40m	+1 / -	HA5CVZ	- / -20	3	Partial capture
09-19 21:31	40m	+6 / -	BG4UCZ	- / -24	4	✓ Closing fragment
09-19 21:29	40m	- / -	PD7LJ	0 / -	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
051015  -6 1331  DL1UDO OK2BXD JN99
051030  -4 1331  CQ DL1UDO JO31 (x2)
051200  -9 1331  M7NQB DL1UDO JO31 (x4)
053730  -7 1490  CQ DL1UDO JO31 (x5)
054130 -12 1490  HI8JCD DL1UDO JO31 (x3)

60m

UTC    dB Audio  Message
043500  -9 1530  S51XA DL1UDO JO31 (x2)
050230  -7 1530  CQ DL1UDO JO31 (x2)
050315  -4 1804  DL1UDO SN40KZE +15
050330  -7 1530  OK4KOP/P DL1UDO R+12
050430  -5 1530  CQ DL1UDO JO31 (x9)

40m

UTC    dB Audio  Message
031430  -9 1523  EA8DQE DL1UDO JO31
031530  -6 1523  W3L DL1UDO JO31 (x2)
031730  -1 1523  IU5SCG DL1UDO JO31 (x3)
031930  -4 1523  KJ5PTH DL1UDO JO31 (x3)
035230  -3 1533  N4IEE DL1UDO 73
035330  -3 1533  HK3VHZ DL1UDO JO31 (x3)
035530  -7 1533  W3L DL1UDO JO31 (x2)

20m

UTC    dB Audio  Message
115415  +6 1032  DG5RC DL1UDO 73
123245  -3 1852  CQ DL1UDO JO31 (x2)
133415  -9 1502  TA1RAW DL1UDO JO31
133700 -18 1362  DL1UDO LZ3HI RR73
133845  -6 1502  CR7CBH DL1UDO JO31 (x3)
142515 -11  602  DL1UDO EA3JFE RR73
151000  -8 1563  IZ7KYS DL1UDO RR73
165000  -4 1563  CQ DL1UDO JO31 (x5)

10m

UTC    dB Audio  Message
151615 -18 1465  <...> DL1UDO JO31 (x2)
131930  +7 1234  DL1UDO LZ1EV -23 (x3)
170115  -8 1672  DL1UDO EC8AVE -08 (x2)
073815 -19 1127  HA3MN DL1UDO 73
074045 -19 1127  YT9WW DL1UDO JO31
074215 -24 1126  F6IRG DL1UDO JO31
075345  -7 1181  DL1UDO IZ3NVR +09 (x2)
080645 -20 1126  UR5WDE DL1UDO JO31
080930 -18 1126  DK8ZZ DL1UDO JO31
104700 -24 1434  DL1UDO IU4PPL +04

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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