DK1SF — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO42

Receiver-side FT8 activity involving DK1SF, decoded by SO8OO in southeastern Poland. 168 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 9 UTC dates in the available aggregate history. Observed between 2026-08-22 and 2026-10-09.

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 168 FT8 messages attributed to DK1SF as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (83%), followed by 80 m (10%) and 20 m (5%). Most decodes (100%) fell within the six-hour window 16:00-22:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (72%); the estimated median was -5 dB.

Overview

168

Messages attributed

UTC dates decoded

Active 15-min windows

-5 dB

Estimated median S/N

Bands

160m · 5 80m · 16 40m · 139 20m · 8

First attributed message: 2026-08-22
Last attributed message: 2026-10-09 21:21 UTC

Observed FT8 message patterns

Attributed sample: 168 messages
Active dates: 9 UTC dates
Estimated median S/N: -5 dB
Estimated 10th-90th percentile: -13 to +3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 40, strong (≥ -8 dB) 121.

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 DK1SF in decoded directed-looking exchanges:

HB9ELE · Switzerland ×2 9A4ZM · Croatia AO5CV · Spain EA2DR · Spain EU6UE · Belarus F5MXH · France F5PBG · France F6FHZ · France HA1BF · Hungary HA7TM · Hungary IK2IWT · Italy IN3IZQ · Italy

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 DK1SF

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: JO42 · 83 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 934 km (approx.)
Last such locator decoded: 2026-10-09 21:17 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	DK1SF S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-09 21:16	40m	-13 / -	UC6W	- / -15	6	Partial capture
10-09 21:14	40m	-5 / -	EA2DR	- / -	2	✓ Closing fragment
10-09 21:13	40m	-12 / -	VK7AC	- / -	2	Partial capture
10-09 20:36	40m	- / -11	AO5CV	-8 / -	2	✓ Closing fragment
10-09 20:24	40m	- / -15	TA2VUZ	-17 / -	2	✓ Closing fragment
10-09 20:15	40m	- / -14	R7BO	-4 / -	2	✓ Closing fragment
10-09 20:14	40m	- / -11	IU5VMC	-1 / -	2	✓ Closing fragment
10-09 20:10	40m	- / 0	LZ1NDV	+1 / -	2	Partial capture
10-09 20:03	40m	-13 / -9	SV5BYP	-12 / -	4	✓ Closing observed
10-09 19:53	40m	-7 / +4	IR8PR	-17 / -	2	Partial capture
10-09 19:51	40m	-4 / -	YO3GJE	- / -15	4	✓ Closing fragment
10-09 19:50	40m	-1 / -	SV2ROG	- / -	2	✓ Closing fragment
10-09 19:46	40m	-17 / -6	RC1C	-14 / +4	5	✓ Full exchange observed
10-09 19:41	40m	-10 / -	SQ8AA	- / -	2	Partial capture
10-09 19:21	40m	+2 / -12	RC2GB	-1 / -	4	✓ Closing observed
10-09 19:14	40m	+2 / -10	HA7TM	-6 / +3	5	✓ Full exchange observed
10-09 19:12	40m	-1 / -5	EC1DD	-4 / -2	3	Partial capture
10-09 19:08	40m	-3 / -	RA6FCU/P	- / -	3	Partial capture
10-09 19:05	40m	-1 / -15	SP4BB	-9 / -	8	✓ Full exchange observed
10-09 19:03	40m	-8 / -	SP0LPR	- / +2	3	✓ Closing fragment
10-09 19:02	40m	0 / -	M8KUU	-17 / -	3	✓ Closing observed
10-09 19:00	40m	-6 / +3	IN3IZQ	-5 / +8	5	✓ Full exchange observed
10-09 18:58	40m	+6 / +3	HB9ELE	+14 / -1	4	✓ Full exchange observed
10-09 18:56	40m	-11 / -	IU7TUV	-14 / -	4	✓ Closing observed
10-09 18:55	40m	-6 / -	OE4KQW	- / -	3	Partial capture
10-09 18:53	40m	-7 / -	EU6UE	- / +5	3	✓ Closing fragment
10-09 18:51	40m	- / -	EA5HM	-5 / -	3	Partial capture
10-09 18:51	40m	-7 / -	M0MLS	- / +6	3	✓ Closing fragment
10-09 18:47	40m	-4 / +1	HA1BF	-17 / -	4	✓ Full exchange observed
10-09 18:46	40m	- / -	S57AM	+6 / -	2	✓ Closing fragment
10-09 18:44	40m	-4 / -3	HB9ELE	+11 / -	4	✓ Full exchange observed
10-09 18:42	40m	-3 / +3	IQ2AAH	-4 / -	5	✓ Full exchange observed
10-09 18:40	40m	-2 / -6	IK2IWT	-4 / +9	5	✓ Full exchange observed
10-08 18:10	40m	-5 / -	A93MO	- / -	2	Partial capture
10-05 20:03	40m	-11 / -5	M6INJ	-19 / -6	3	✓ Full exchange observed
10-05 20:02	40m	-6 / +2	IU4DTV	-7 / -	3	✓ Full exchange observed
10-05 19:59	40m	-6 / -	RZ4FWA	- / -11	3	✓ Closing fragment
10-05 19:48	40m	0 / -	OE6TNO	- / +6	2	✓ Closing fragment
10-05 19:47	40m	-6 / -	F5MXH	- / -	2	✓ Closing fragment
10-05 19:43	40m	-9 / -	PD2MV	- / -	2	✓ Closing fragment
10-05 19:39	40m	-9 / -	LY5J	- / -	3	✓ Closing fragment
10-05 19:39	40m	- / -	DF3IS	+6 / -	2	Partial capture
10-05 19:39	40m	- / -	F3CJ	-14 / -	3	Partial capture
10-05 19:15	80m	-6 / -	UA4FKT	- / +4	3	Partial capture
10-05 19:11	80m	- / -17	SP6FME	+12 / -	6	Partial capture
10-05 19:09	80m	-3 / -	LA3S	- / -	3	Partial capture
10-03 19:35	40m	-8 / -	UX7QV	- / +3	2	Partial capture
10-03 19:34	40m	- / -	S51PV	-7 / -	3	Partial capture
10-02 19:52	160m	-14 / -	9A4ZM	- / +7	2	✓ Closing fragment
10-02 19:04	40m	-2 / +4	F6FHZ	-12 / -	6	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
203630  -7 2078  DK1SF AO5CV -11 (x2)
204615 -18 1183  DK1SF IT9ACJ RR73
204800 -24 1414  DK1SF HG5OGI -14
210930  -9 1026  UC8YXV/R DK1SF JO42
211300 -15 2004  VK7AC DK1SF JO42 (x2)
211430  -6  602  EA2DR DK1SF JO42 (x2)
211600 -10 1604  UC6W DK1SF JO42 (x6)

80m

UTC    dB Audio  Message
213645  +7 2148  DK1SF DK7ZT RR73
211700  -7 2254  R9SS DK1SF JO42
190930  -6  856  LA3S DK1SF JO42 (x3)
191100  -6  856  CQ DK1SF JO42                         a1
191115 +11  856  DK1SF SP6FME JO90 (x6)
191530  -6  856  UA4FKT DK1SF +04 (x3)

160m

UTC    dB Audio  Message
194915 -18 2096  CQ DK1SF JO42 (x3)
195215 -16 2096  9A4ZM DK1SF +07 (x2)

20m

UTC    dB Audio  Message
181130 -24 2335  DK1SF YB7FII -15
204430  -3 2045  BG7BVI DK1SF JO42 (x2)
204715 -11 2275  BG7BMG DK1SF JO42 (x2)
163545 -10 2265  AP2TN DK1SF JO42 (x4)

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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