CT1DUD — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Portugal Most frequent locator attributed to this token: IM59

Receiver-side FT8 activity involving CT1DUD, decoded by SO8OO in southeastern Poland. 50 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-30 and 2026-09-04.

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 50 FT8 messages attributed to CT1DUD as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (76%), followed by 20 m (24%). Most decodes (96%) fell within the six-hour window 18:00-00:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

40m · 38 20m · 12

First attributed message: 2026-06-30
Last attributed message: 2026-09-04 23:37 UTC

Observed FT8 message patterns

Attributed sample: 50 messages
Active dates: 7 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -18 to -6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 26, strong (≥ -8 dB) 9.

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 CT1DUD in decoded directed-looking exchanges:

3A2MW · Monaco A71AH · Qatar GJ0KYZ · Jersey CR7BRV · Portugal EA4D · Spain EC3A · Spain EI9KF · Ireland F1PBZ · France G6MTI · England G7RCQ · England LA3BO · Norway LB8TG · Norway

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 CT1DUD

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: IM59 · 17 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,670 km (approx.)
Last such locator decoded: 2026-09-03 20:35 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	CT1DUD S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-04 23:34	40m	-12 / -10	CR7BRV	-2 / 0	4	✓ Full exchange observed
09-04 23:32	40m	-6 / -	OD5ZZ	- / -24	2	Partial capture
09-04 23:25	40m	-22 / -	EX7CQ	- / -15	2	Partial capture
09-03 23:08	40m	- / -5	F1PBZ	0 / -	2	✓ Closing fragment
09-03 23:03	40m	- / -2	LA3BO	+2 / -	2	✓ Closing fragment
09-03 20:48	40m	-17 / -	<...>	- / -20	2	Partial capture
09-03 20:43	40m	-8 / -	<...>	- / -20	5	Partial capture
09-03 20:40	40m	-11 / -	II7MGMU	- / -20	3	Partial capture
09-03 20:38	40m	-14 / -	<...>	- / -20	2	Partial capture
09-03 20:34	40m	-13 / -	JF1UVJ	- / -	3	Partial capture
09-03 20:31	40m	- / -10	G7RCQ	-8 / -	3	✓ Closing fragment
09-03 20:28	40m	- / -7	EA4D	-15 / -	3	✓ Closing fragment
09-03 20:26	40m	- / +9	G6MTI	-6 / -	3	✓ Closing fragment
09-02 22:43	40m	-4 / -	RI1FJL	- / -	2	Partial capture
09-02 22:41	40m	- / -	UB0AMB	-18 / -	2	Partial capture
09-02 22:35	40m	-11 / -3	TF8KW	-14 / -6	5	✓ Full exchange observed
09-02 22:32	40m	-15 / +7	LB8TG	-3 / -7	3	✓ Full exchange observed
09-02 22:29	40m	-16 / -	EC3A	-5 / 0	4	✓ Closing observed
08-26 23:14	40m	-18 / +10	EI9KF	-3 / -	5	✓ Closing observed
08-24 15:01	20m	- / -	EB3DBR	-10 / -	2	Partial capture
08-24 14:59	20m	+3 / +7	GJ0KYZ	+10 / +8	4	✓ Full exchange observed
08-12 13:05	10m	- / -12	DN9OPA	-9 / -	13	Partial capture
08-08 11:26	20m	- / -	SV5BYP	-15 / -	2	Partial capture
06-30 18:11	20m	-20 / -6	3A2MW	-22 / -	2	✓ Closing observed
06-30 18:06	20m	-16 / -	MM3ZTS	- / -	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
130500  -7 2394  CT1DUD DN9OPA JN38 (x13)
140730 -14 2388  CT1DUD 5Z4VJ R+00

40m

UTC    dB Audio  Message
230400  +5 2063  CT1DUD LA3BO 73
230645 -13 1107  3Z100PKP CT1DUD -06
230830 -10 1586  CT1DUD UA6ADA KN95
230830  +3 2638  CT1DUD F1PBZ -05 (x2)
230930 -14  332  CT1DUD F6FHZ JN18
232545 -23 1736  EX7CQ CT1DUD -15 (x2)
233230  -5  470  OD5ZZ CT1DUD -24 (x2)
233400 -10  926  CR7BRV CT1DUD +00
233415  -3  925  CT1DUD CR7BRV R-10
233430 -13  926  CR7BRV CT1DUD RR73
233445  -1  925  CT1DUD CR7BRV 73
233745  -9  444  RI1FJL CT1DUD -11

20m

UTC    dB Audio  Message
181900 -13 1694  CT1DUD RR73; G0KUC <...> -06
182600 -16 2187  A71AH CT1DUD 73
182700 -14 1660  BH2WTV CT1DUD IM59
182830 -14 1409  OH6DHM CT1DUD IM59
185215  -9 1408  CT1DUD OH6DHM -11
112630 -16 1884  CT1DUD SV5BYP KM46 (x2)
112815  -5 2781  CT1DUD MI0JZZ -05
220145 -15  803  JR1NHD CT1DUD IM59
145945 +11  602  CT1DUD GJ0KYZ +07
150000  +4  602  GJ0KYZ CT1DUD R+08
150015  +9  602  CT1DUD GJ0KYZ RR73
150030  +2  602  GJ0KYZ CT1DUD 73
150115  -6  553  CT1DUD EB3DBR JN11 (x2)

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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