DO3SST — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO40

Receiver-side FT8 activity involving DO3SST, decoded by SO8OO in southeastern Poland. 86 FT8 messages attributed to this token as transmitter, on 80m, 10m, across 6 UTC dates in the available aggregate history. Observed between 2026-07-02 and 2026-09-12.

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 86 FT8 messages attributed to DO3SST 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 (91%), followed by 10 m (9%). Most decodes (91%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

80m · 78 10m · 8

First attributed message: 2026-07-02
Last attributed message: 2026-09-12 17:04 UTC

Observed FT8 message patterns

Attributed sample: 86 messages
Active dates: 6 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -20 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 21, moderate (-15 to -9 dB) 32, strong (≥ -8 dB) 33.

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 DO3SST in decoded directed-looking exchanges:

IK4RVY · Italy TK5K · Corsica 9A5E · Croatia DA6NEL · Fed. Rep. of Germany DJ3WF · Fed. Rep. of Germany DL1RMY · Fed. Rep. of Germany DL5OAH · Fed. Rep. of Germany DO1RWM · Fed. Rep. of Germany DO1SC · Fed. Rep. of Germany DO1TEM · Fed. Rep. of Germany DO8PAT · Fed. Rep. of Germany E70SZ · Bosnia-Herzegovina

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 DO3SST

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: JO40 · 44 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 911 km (approx.)
Last such locator decoded: 2026-09-12 17:04 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	DO3SST S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-12 16:55	80m	-17 / -	DM5WH	- / -2	2	Partial capture
09-12 16:53	80m	-20 / -	OZ0A	- / -7	2	Partial capture
09-12 16:48	80m	- / -	DO8PAT	-8 / -	2	✓ Closing fragment
09-11 19:47	80m	-8 / +1	DJ3WF	-14 / +3	4	✓ Full exchange observed
09-11 19:24	80m	-14 / -4	9A5E	+6 / -	5	✓ Full exchange observed
09-11 19:21	80m	-8 / -8	G8BCG	-21 / -5	5	✓ Full exchange observed
09-11 19:18	80m	- / 0	OE9HGV	-14 / -	2	✓ Closing fragment
09-11 19:13	80m	-6 / -12	YO4NF	+6 / +2	4	✓ Full exchange observed
09-11 19:06	80m	-9 / -	DO1BWO	- / -15	2	Partial capture
09-11 19:05	80m	-15 / -	PF1B	- / -10	2	Partial capture
09-11 19:02	80m	- / -7	SP5DFK	-7 / -	2	✓ Closing fragment
09-11 17:00	80m	- / -5	OZ9FF	+11 / -	2	✓ Closing fragment
09-11 16:52	80m	-15 / -8	DO1RWM	-8 / 0	4	✓ Full exchange observed
09-11 16:49	80m	-24 / -7	SQ2JDM	+6 / -	3	✓ Closing observed
09-11 16:43	80m	-14 / -19	IQ4JO	-1 / -	4	✓ Closing observed
09-11 16:37	80m	- / -	OE5YCP	-14 / -	2	Partial capture
09-11 16:36	80m	-19 / -4	DO1SC	-20 / -11	5	✓ Full exchange observed
09-11 16:22	80m	-22 / -	DL1ASL	-24 / -	2	Partial capture
09-09 15:05	80m	- / -19	DL1RMY	-20 / -	2	✓ Closing fragment
09-05 18:15	80m	-11 / -2	DA6NEL	-17 / -	3	✓ Closing observed
09-05 18:13	80m	-12 / -9	UY5BF	+14 / +4	5	✓ Full exchange observed
09-05 18:10	80m	-9 / +1	YL2NX	+1 / +3	7	✓ Full exchange observed
09-05 18:09	80m	-9 / -	DO1XMC	- / -13	2	Partial capture
09-05 18:05	80m	-6 / -4	SQ1EIC	-2 / -2	4	Partial capture
09-05 18:00	80m	-14 / -	PA3GAE	- / -	2	Partial capture
09-05 18:00	80m	-11 / -6	IQ4JO	+1 / +5	3	Partial capture
07-24 14:29	10m	- / -	IW3BS	-7 / -	2	Partial capture
07-24 14:06	10m	-8 / +7	TK5K	-9 / -	3	✓ Closing observed
07-03 19:12	80m	-10 / -14	II6WWA	-1 / -6	3	Partial capture
07-03 19:01	80m	- / -1	E70SZ	+7 / -	3	✓ Closing fragment
07-02 21:17	80m	- / -	F5RRS	-4 / -	3	Partial capture
07-02 21:17	80m	-3 / -	DO1TEM	- / -5	2	✓ Closing fragment
07-02 21:13	80m	+2 / +1	DL5OAH	0 / +8	4	✓ 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
194730 -18  841  DO3SST DJ3WF R+01 (x2)
194815  -9  842  DJ3WF DO3SST 73
164815  -7  834  DO3SST DO8PAT RRR (x2)
165200 -20 1667  CQ DO3SST JO40 (x2)
165300 -23 1667  OZ0A DO3SST -07 (x2)
165530 -19 1502  DM5WH DO3SST JO40 (x2)
170000 -12 1107  CQ DO3SST JO40 (x4)

10m

UTC    dB Audio  Message
120115 -19 1976  DO3SST IK4RVY RR73
140645 -12  497  DO3SST TK5K +07 (x2)
140730  -8  497  TK5K DO3SST 73
141200 -24 1749  CQ DO3SST JO40 (x3)
142915  -7 1671  DO3SST IW3BS JN55 (x2)
143200 -13  999  CQ DO3SST JO40 (x3)
143330  -9  999  OH3OJ DO3SST R-07

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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