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. 447 FT8 messages attributed to this token as transmitter, on 160m, 80m, across 6 UTC dates in the available aggregate history. Observed between 2026-08-01 and 2026-09-03.

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 447 FT8 messages attributed to DO1BTW as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (93%), followed by 160 m (7%). 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

447

Messages attributed

UTC dates decoded

Active 15-min windows

+12 dB

Estimated median S/N

Bands

160m · 31 80m · 416

First attributed message: 2026-08-01
Last attributed message: 2026-09-03 20:18 UTC

Observed FT8 message patterns

Attributed sample: 447 messages
Active dates: 6 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) 446.

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 OE9RWH · Austria ×2 F6DKQ · France HB9AWS · Switzerland R4FDD · European Russia R9SAP · Asiatic Russia RK3QA · European Russia SP2OSA · Poland SP7CMW · Poland UA3FH · European Russia CT7AUT · Portugal DA6KB · Fed. Rep. of Germany

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 · 206 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,054 km (approx.)
Last such locator decoded: 2026-09-03 20:18 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
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
08-19 21:35	80m	+10 / +10	R3EDI	-2 / -4	4	✓ Full exchange observed
08-19 21:34	80m	+6 / -	OK1LTV	-8 / -10	7	✓ Full exchange observed
08-19 21:28	80m	+9 / -	M7GOA	- / -14	10	✓ Closing fragment
08-19 21:23	80m	+7 / -	DM3XD	-12 / -8	4	✓ Full exchange observed
08-19 21:05	80m	+7 / -	PA0EBG	- / -	32	Partial capture
08-19 21:04	80m	+5 / -	DO9WZ	- / -16	2	✓ Closing fragment
08-19 21:02	80m	+8 / +2	EA7AH	-14 / -11	5	✓ Full exchange observed
08-19 21:00	80m	+7 / -	CT7AUT	- / -15	3	✓ Closing fragment
08-19 20:44	80m	+13 / -6	UR5NPF	+14 / -6	5	✓ Full exchange observed
08-19 20:41	80m	+17 / -6	RD7O	+1 / -4	6	✓ Full exchange observed
08-19 20:35	80m	+16 / -	DO4HHK	- / -14	7	✓ Closing fragment
08-19 20:31	80m	+14 / -	DL3YAV	-9 / -4	3	✓ Closing observed
08-19 20:29	80m	+15 / +8	DL7ARV	-2 / -9	5	✓ Full exchange observed
08-19 20:24	80m	- / -	RD7O	+1 / -	2	Partial capture
08-19 20:23	80m	+14 / +9	F1TXI	-6 / 0	5	✓ Full exchange observed
08-19 20:20	80m	+14 / -	DM2BM	-3 / -2	5	✓ Full exchange observed
08-19 20:17	80m	+16 / -	DF5RA	-9 / -10	4	✓ Full exchange observed
08-19 20:12	80m	- / -	JH4ADV	-4 / -	2	Partial capture
08-19 20:11	80m	+16 / -20	SV7LWI	-6 / -12	5	✓ Full exchange observed
08-19 20:08	80m	+14 / -	DO1LR	+3 / +1	4	✓ Closing observed
08-19 20:02	80m	+14 / -2	DO7RMS	+5 / -1	5	✓ Full exchange observed
08-19 20:01	80m	+16 / -	DA6YY	- / -7	2	✓ Closing fragment
08-19 19:59	80m	+10 / -	DK8CX	+10 / -2	4	✓ Full exchange observed
08-19 19:58	80m	+13 / -	DF2UF	-3 / -6	5	✓ Full exchange observed
08-19 19:56	80m	+14 / -	F4BPO	-4 / -9	5	✓ Full exchange observed
08-19 19:54	80m	+18 / -3	LZ2VQ	+2 / -12	6	✓ Full exchange observed
08-19 19:53	80m	+12 / +9	UR1CCT	+18 / 0	5	✓ Full exchange observed
08-18 20:41	160m	+14 / -	SP7CMW	0 / -1	5	✓ Full exchange observed
08-18 20:39	160m	+12 / -	EC5KY	-1 / -3	4	✓ Closing observed
08-18 20:30	80m	+16 / -7	DL9KM	+5 / -10	5	✓ Full exchange observed
08-18 20:30	80m	+18 / +8	LZ2INP	+19 / -10	7	✓ Full exchange observed
08-18 20:30	80m	+16 / -10	E79KO	+5 / -12	9	✓ 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
201230 +15  284  DO1DMR DO1BTW -08 (x2)
201330 +17  284  CQ DO1BTW JO31 (x4)
201515  +4  283  DO1BTW DK4RH JO31
201530 +12  284  DK4RH DO1BTW -04
201545  +7  283  DO1BTW DK4RH R+00
201600 +11  283  DK4RH DO1BTW RR73
201615  +2  283  DO1BTW DK4RH 73
201630 +19  283  EA7KZ DO1BTW -07 (x3)
201800 +14  283  CQ DO1BTW JO31

160m

UTC    dB Audio  Message
203930 +14  714  EC5KY DO1BTW R-03
203945  -1  808  DO1BTW EC5KY RR73
204000 +10  714  EC5KY DO1BTW 73
204030 +12  714  CQ DO1BTW JO31
204115 +12  714  SP7CMW DO1BTW JO31
204130  -1  900  DO1BTW SP7CMW +18
204145 +15  714  SP7CMW DO1BTW R-01
204200  +2  900  DO1BTW SP7CMW RR73
204215 +14  714  SP7CMW DO1BTW 73
204245 +13  714  CQ DO1BTW JO31 (x2)
200700 +10  268  HB9AWS DO1BTW RR73
200730 +15  268  LA9GX DO1BTW +06 (x3)

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