DO7TTR — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JN58

Receiver-side FT8 activity involving DO7TTR, decoded by SO8OO in southeastern Poland. 1,016 FT8 messages attributed to this token as transmitter, on 160m, 80m, 10m, across 15 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-09-16.

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 1,016 FT8 messages attributed to DO7TTR as the transmitting token by decoded message structure across 15 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (88%), followed by 10 m (11%) and 160 m (1%). Most decodes (87%) fell within the six-hour window 04:00-10:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9.1 dB.

Overview

1,016

Messages attributed

UTC dates decoded

Active 15-min windows

-9.1 dB

Estimated median S/N

Bands

160m · 11 80m · 890 10m · 115

First attributed message: 2026-06-10
Last attributed message: 2026-09-16 06:28 UTC

Observed FT8 message patterns

Attributed sample: 1,016 messages
Active dates: 15 UTC dates
Estimated median S/N: -9.1 dB
Estimated 10th-90th percentile: -16 to -3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 137, moderate (-15 to -9 dB) 449, strong (≥ -8 dB) 430.

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 DO7TTR in decoded directed-looking exchanges:

9A2VQ · Croatia CR7BRV · Portugal DO1NUE · Fed. Rep. of Germany EA5BCO · Spain EC3A · Spain EC7R · Spain F5MXH · France RA3YAO · European Russia RD7LC · European Russia RD7LO · European Russia RT3K · European Russia SQ8ECJ · Poland

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 DO7TTR

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: JN58 · 829 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 799 km (approx.)
Last such locator decoded: 2026-09-16 06:28 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	DO7TTR S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-16 06:23	80m	-12 / -	LA1AAA	- / -	2	Partial capture
09-16 06:18	80m	-12 / -	DL5EBS	- / +3	3	✓ Closing fragment
09-16 06:09	80m	-12 / -	PA0MUS	- / -	3	Partial capture
09-16 06:07	80m	-13 / -	DH4MK	- / -	4	Partial capture
09-16 06:04	80m	-10 / -	G4AMT	- / -	4	Partial capture
09-16 06:02	80m	-12 / -	F4EJL	- / -	2	✓ Closing fragment
09-16 05:58	80m	-12 / -	VE3DZ	- / -	4	Partial capture
09-16 05:54	80m	-12 / -	F4GVO	-12 / -1	6	✓ Closing observed
09-16 05:51	80m	-9 / -	F5OAM	- / -	3	Partial capture
09-16 05:50	80m	-9 / +10	DK2MAX	-5 / +8	5	✓ Full exchange observed
09-16 05:46	80m	-7 / -	F5OAM	- / -	3	Partial capture
09-16 05:35	80m	-9 / -	F5OIH	- / -9	4	✓ Closing fragment
09-16 05:33	80m	-6 / -	DO1OAS	- / -7	2	✓ Closing fragment
09-16 05:29	80m	-9 / -8	HA3GB	-6 / -17	7	✓ Full exchange observed
09-16 05:27	80m	-10 / -	VP2MAA	- / -	5	Partial capture
09-16 05:25	80m	-7 / -	DO1OAS	- / -14	3	Partial capture
09-16 05:23	80m	-10 / -	GW4BCF	- / -16	2	Partial capture
09-16 05:22	80m	-8 / -	M9HEB	- / -	2	Partial capture
09-16 05:18	80m	-10 / -4	PA4PA	+2 / -	5	Partial capture
09-16 05:15	80m	-10 / -	VP2MAA	- / -	3	Partial capture
09-16 05:14	80m	-6 / -13	ON2WI	-12 / -2	7	✓ Full exchange observed
09-16 05:11	80m	-10 / -	G6WKZ	- / -	4	Partial capture
09-16 05:05	80m	-7 / -19	DA6DE	-17 / -24	12	Partial capture
09-16 05:04	80m	-11 / +7	DL3TC	+5 / +9	7	✓ Full exchange observed
09-16 05:02	80m	-7 / -2	DJ3JD	-8 / +5	5	✓ Full exchange observed
09-16 04:59	80m	-7 / -	EA3IJQ	- / -17	2	✓ Closing fragment
09-16 04:57	80m	-10 / -18	E75FM	-2 / -16	13	✓ Full exchange observed
09-16 04:55	80m	-7 / -	EA3IJQ	- / -	4	Partial capture
09-16 04:53	80m	-4 / -	DA6DE	- / -	4	Partial capture
09-16 04:50	80m	-7 / -	II8IHBC	- / -	4	Partial capture
09-16 04:47	80m	-6 / -7	DO5PAP	-8 / -18	9	✓ Full exchange observed
09-16 04:45	80m	-8 / -16	EC5M	-6 / -2	6	✓ Full exchange observed
09-16 04:42	80m	-6 / -	DA6PP	- / -	3	Partial capture
09-16 04:41	80m	-12 / -	DO4FBI	- / -13	3	✓ Closing fragment
09-16 04:39	80m	-7 / -	N1WI	- / -	3	Partial capture
09-16 04:26	160m	- / -11	IK2OLD	-4 / -	3	✓ Closing fragment
09-16 04:24	160m	- / -7	LA6YEA	-10 / -	2	✓ Closing fragment
09-16 04:21	160m	- / -9	IK4MTK	-18 / -	2	✓ Closing fragment
09-09 07:16	80m	-16 / -24	DL0VW	-2 / -7	6	✓ Full exchange observed
09-09 07:11	80m	-18 / -	DP75BAC	- / -	2	Partial capture
09-09 06:57	80m	-11 / -	DO6KGS	- / -	3	Partial capture
09-09 06:43	80m	-12 / -6	DH5NC	-14 / 0	3	Partial capture
09-09 06:04	80m	-23 / -	DP75BAC	- / -3	2	Partial capture
09-09 06:03	80m	-20 / -	SQ100PKP	- / -	2	Partial capture
09-09 05:59	80m	-11 / -	EA1AEC	- / -18	5	Partial capture
09-09 05:53	80m	-10 / -	SP5HQZ	- / -	4	Partial capture
09-09 05:50	80m	-10 / -2	SQ100PKP	-7 / +4	2	Partial capture
09-09 05:46	80m	- / -5	DL1JEL	-1 / -	4	✓ Closing fragment
09-09 05:42	80m	-14 / -	DJ1NE	- / +2	2	Partial capture
09-09 05:39	80m	-11 / -11	ON1WFF	-24 / -2	6	✓ 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
061645 -18 2271  CQ DO7TTR JN58 (x3)
061830 -10 2271  DL5EBS DO7TTR JN58 (x3)
062000 -12 2271  CQ DO7TTR JN58 (x4)
062330 -14 2271  LA1AAA DO7TTR JN58 (x2)
062645 -10 2271  CQ DO7TTR JN58 (x3)

160m

UTC    dB Audio  Message
194100 -17 2381  CQ DO7TTR JN58                        a1 (x2)
194300 -12 2381  R7CD DO7TTR JN58 (x2)
214330 -19 2262  CQ DO7TTR JN58
214530 -13 2261  VO1IV DO7TTR JN58 (x3)
042130 -19 1743  DO7TTR IK4MTK -09 (x2)
042430 -11  765  DO7TTR LA6YEA -07 (x2)
042600  -2  397  DO7TTR IK2OLD JN45 (x3)

10m

UTC    dB Audio  Message
094845  -8 2353  CQ DO7TTR JN58
094915  -9 2353  IS0LYN DO7TTR JN58 (x2)
095115 -16 2353  CQ DO7TTR JN58 (x2)
095245 -19 2354  <...> DO7TTR JN58 (x2)
095415 -16 2354  CQ DO7TTR JN58
100300 -14  881  DO7TTR RD7LO R-19 (x2)
101745 -20 2353  CQ DO7TTR JN58                        a1
101815 -17 2353  YO2LFP DO7TTR JN58 (x2)
121345 -19 2354  DO7TTR F4FCE R-11
121715 -22 1578  DO7TTR SV1ENV -12

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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