DO1BTW — 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 DO1BTW, decoded by SO8OO in southeastern Poland. 536 FT8 messages attributed to this token as transmitter, on 160m, 80m, across 7 UTC dates in the available aggregate history. Observed between 2026-08-01 and 2026-10-02.

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 536 FT8 messages attributed to DO1BTW as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (79%), followed by 160 m (21%). 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 strong S/N range (100%); the estimated median was +12 dB.

Overview

536

Messages attributed

UTC dates decoded

Active 15-min windows

+12 dB

Estimated median S/N

Bands

160m · 113 80m · 423

First attributed message: 2026-08-01
Last attributed message: 2026-10-02 20:38 UTC

Observed FT8 message patterns

Attributed sample: 536 messages
Active dates: 7 UTC dates
Estimated median S/N: +12 dB
Estimated 10th-90th percentile: +5 to +18 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 1, strong (≥ -8 dB) 535.

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 DO1BTW in decoded directed-looking exchanges:

EC5KY · Spain ×2 ES5RY · Estonia ×2 JA5BZL · Japan ×2 OE9RWH · Austria ×2 DK5IR · Fed. Rep. of Germany DK7TM · Fed. Rep. of Germany DO1BWO · Fed. Rep. of Germany DO1UGS · Fed. Rep. of Germany F5JAE · France F6DKQ · France G0ACQ · England HB9AWS · Switzerland

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 DO1BTW

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 · 227 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,054 km (approx.)
Last such locator decoded: 2026-10-02 20:33 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	DO1BTW S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-02 20:38	80m	+6 / +1	DK7TX	-2 / -1	4	✓ Full exchange observed
10-02 20:33	80m	+11 / +4	DO2BBC	-5 / 0	3	✓ Full exchange observed
10-02 20:28	160m	+6 / -	II5GG	+3 / -8	3	✓ Closing observed
10-02 20:25	160m	+16 / -	LA7DFA	- / +9	4	Partial capture
10-02 20:12	160m	- / -1	OZ2LIN	-2 / -	2	✓ Closing fragment
10-02 20:02	160m	+17 / -	SV9GPV	- / -8	3	Partial capture
10-02 20:00	160m	+11 / -4	UA4PPQ	-12 / -	5	✓ Closing observed
10-02 20:00	160m	+7 / -	PA3DUU	- / -10	2	✓ Closing fragment
10-02 19:59	160m	+15 / -3	ES5RY	+2 / -	3	✓ Closing observed
10-02 19:57	160m	+8 / -	JE7GXQ	- / -20	2	✓ Closing fragment
10-02 19:54	160m	+9 / -	JA4FSH	- / -12	2	✓ Closing fragment
10-02 19:52	160m	+9 / -8	DO1UGS	-8 / -8	5	✓ Full exchange observed
10-02 19:51	160m	+2 / -	G0ACQ	- / -11	2	✓ Closing fragment
10-02 19:49	160m	+11 / -	F5JAE	- / -18	3	✓ Closing fragment
10-02 19:47	160m	+6 / -	OK1AWC	-2 / +2	5	✓ Full exchange observed
10-02 19:47	160m	+9 / -	JA2VQF	-17 / -19	3	Partial capture
10-02 19:46	160m	+7 / -	JA6VQA	- / -15	2	✓ Closing fragment
10-02 19:44	160m	+8 / -	DK7TM	- / -14	2	✓ Closing fragment
10-02 19:42	160m	+12 / -	JA4LXY	-21 / -17	3	✓ Closing observed
10-02 19:41	160m	+12 / -10	JA6MWW	-21 / -11	4	✓ Full exchange observed
10-02 19:40	160m	+14 / -	DO1BWO	- / -15	2	✓ Closing fragment
10-02 19:38	160m	+17 / -	IZ7LDC	-6 / -7	4	✓ Closing observed
10-02 19:35	160m	+18 / -15	UA4CKN	-16 / -10	5	✓ Full exchange observed
10-02 19:34	160m	+20 / -	JA5BZL	- / -16	2	✓ Closing fragment
10-02 19:32	160m	+17 / -	PE1NPS	- / -1	2	✓ Closing fragment
10-02 19:31	160m	+17 / -	JA4LXY	-22 / +8	4	Partial capture
10-02 19:30	160m	+17 / -	JA3FYC	- / -14	3	✓ Closing fragment
10-02 19:28	160m	+19 / -	JF4VZT	-17 / -16	4	✓ Closing observed
10-02 19:26	160m	+20 / -6	RU3FM	-2 / -10	5	✓ Full exchange observed
10-02 19:25	160m	+18 / -	JA4LXY	- / 0	2	Partial capture
10-02 19:24	160m	+20 / -	DK5IR	-2 / -1	4	✓ Closing observed
10-02 19:23	160m	- / -	DG6ITP	-9 / -	3	Partial capture
09-03 20:16	80m	+17 / -	EA7KZ	- / -7	3	Partial capture
09-03 20:15	80m	+12 / 0	DK4RH	+4 / -4	5	✓ Full exchange observed
09-03 20:12	80m	+18 / -	DO1DMR	- / -8	3	✓ Closing fragment
09-03 20:07	160m	+12 / -	LA9GX	- / +6	3	Partial capture
08-25 19:24	80m	-4 / -	OE9RWH	-3 / -5	3	✓ Full exchange observed
08-25 19:20	80m	+5 / -	UA3SCU	-15 / -6	4	✓ Closing observed
08-25 19:19	80m	+4 / -	OE9RWH	-4 / -2	5	✓ Full exchange observed
08-25 19:14	80m	+7 / -	MW7GQB	-18 / +4	3	✓ Closing observed
08-25 19:12	80m	+6 / -	DK1GP	-14 / -2	5	✓ Full exchange observed
08-25 19:08	80m	+3 / +7	SP5DFK	-6 / -6	5	✓ Full exchange observed
08-25 19:05	80m	+4 / -	ON8BZ	- / +2	2	Partial capture
08-24 19:09	80m	+7 / -	M1DDD	- / -2	2	✓ Closing fragment
08-24 19:07	80m	+8 / -	DL9GF	- / -3	2	✓ Closing fragment
08-24 19:05	80m	+10 / -	F5LVR	-2 / -2	5	✓ Full exchange observed
08-24 19:04	80m	+14 / -13	YO8XFU	+6 / -13	4	✓ Full exchange observed
08-19 21:41	80m	+10 / +1	RN3AOE	-16 / -14	5	✓ Full exchange observed
08-19 21:38	80m	+8 / +8	HB3YOR	-11 / -9	6	✓ Full exchange observed
08-19 21:38	80m	+11 / -	DL1HTB	-21 / 0	5	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
201615  +2  283  DO1BTW DK4RH 73
201630 +19  283  EA7KZ DO1BTW -07 (x3)
201800 +14  283  CQ DO1BTW JO31 (x3)
203330  +7  214  DO2BBC DO1BTW +00
203345  -5 1294  DO1BTW DO2BBC R+04
203400 +15  214  DO2BBC DO1BTW RR73
203730  +7  214  HB9EFK DO1BTW +05
203800  +4  214  DK7TX DO1BTW -01
203815  +0 1569  DO1BTW DK7TX R+01
203830  +8  214  DK7TX DO1BTW RR73
203845  -5 1569  DO1BTW DK7TX 73

160m

UTC    dB Audio  Message
200130 -24  868  DO1BTW R3ICU KO66
200145 +11  408  UA4PPQ DO1BTW RR73
200200 -16  955  DO1BTW UA4PPQ 73
200215 +15  408  SV9GPV DO1BTW -08 (x3)
201215  -1 2525  DO1BTW OZ2LIN R-01 (x2)
202515  +9  408  LA7DFA DO1BTW +09 (x4)
202800  +4  408  II5GG DO1BTW -08 (x2)
202845  +3  730  DO1BTW II5GG 73

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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