CT7ARQ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Portugal Most frequent locator attributed to this token: IN51

Receiver-side FT8 activity involving CT7ARQ, decoded by SO8OO in southeastern Poland. 858 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 16 UTC dates in the available aggregate history. Observed between 2026-08-08 and 2026-09-19.

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 858 FT8 messages attributed to CT7ARQ as the transmitting token by decoded message structure across 16 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (63%), followed by 60 m (22%) and 20 m (12%). Most decodes (81%) fell within the six-hour window 21:00-03:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (66%); the estimated median was -17 dB.

Overview

858

Messages attributed

UTC dates decoded

111

Active 15-min windows

-17 dB

Estimated median S/N

Bands

80m · 24 60m · 185 40m · 544 20m · 105

First attributed message: 2026-08-08
Last attributed message: 2026-09-19 23:56 UTC

Observed FT8 message patterns

Attributed sample: 858 messages
Active dates: 16 UTC dates
Estimated median S/N: -17 dB
Estimated 10th-90th percentile: -22 to -11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 566, moderate (-15 to -9 dB) 256, strong (≥ -8 dB) 36.

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 CT7ARQ in decoded directed-looking exchanges:

F1TXI · France ×2 F5RRS · France ×2 G0BLB · England ×2 IZ0MIT · Italy ×2 3A2MW · Monaco CS8ABF · Azores EA3KY · Spain EI4KKB · Ireland F5IXN · France G4DBW · England G4UJS · England GX4BRA · England

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 CT7ARQ

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: IN51 · 717 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,546 km (approx.)
Last such locator decoded: 2026-09-19 23:56 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	CT7ARQ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 23:48	40m	- / -	PD4RJ	-8 / -	3	Partial capture
09-19 23:36	40m	- / -	PD4RJ	-12 / -	4	Partial capture
09-19 23:29	40m	- / -	PD4RJ	-8 / -	4	Partial capture
09-19 23:23	40m	- / -	PD4RJ	-11 / -	4	Partial capture
09-19 23:19	40m	- / -	PD4RJ	-13 / -	4	Partial capture
09-19 23:18	40m	- / -	DL6RS	+12 / -	2	Partial capture
09-19 23:09	40m	- / -	PD7LJ	-10 / -	9	Partial capture
09-19 23:03	40m	- / -14	R3ES	0 / -	3	Partial capture
09-19 22:57	40m	- / -	G3WRO	-21 / -	3	Partial capture
09-19 22:51	40m	- / -	TA3NK	-3 / -	7	Partial capture
09-19 22:47	40m	- / -	GX3RAF/P	-5 / -	3	Partial capture
09-19 22:47	40m	- / -	F1IQH	-8 / -	2	Partial capture
09-19 22:47	40m	- / -	PD4RJ	-9 / -	7	Partial capture
09-19 22:40	40m	-14 / -	3Z100PKP	- / 0	8	Partial capture
09-19 22:30	40m	-17 / -18	UF1A	0 / -18	7	✓ Full exchange observed
09-19 22:27	40m	-17 / -	RX6AOB	- / -	3	Partial capture
09-19 22:24	40m	- / -10	SP6JIU	-4 / -	2	✓ Closing fragment
09-19 22:19	40m	-12 / 0	GM3AND	-8 / -	3	✓ Closing observed
09-19 22:17	40m	-11 / -	TN8GD	- / -	2	Partial capture
09-19 21:53	40m	-14 / -7	ON8WR	-14 / -5	3	Partial capture
09-19 21:49	40m	-16 / -	R3RRC/P	- / -	2	Partial capture
09-19 21:36	40m	-13 / -	IQ0AAI	- / -	10	Partial capture
09-19 21:34	40m	-11 / -	CT1EDG	- / -	3	✓ Closing fragment
09-19 21:32	40m	-16 / -	M6AUK	- / -8	4	✓ Closing fragment
09-19 21:14	40m	-19 / +3	G7RAU	-2 / -8	3	✓ Full exchange observed
09-19 05:46	60m	- / -13	DH9DR	-6 / -	3	✓ Closing fragment
09-19 05:03	60m	- / -6	LB4PI	-5 / -	3	✓ Closing fragment
09-19 05:02	60m	- / -	DL7UKM	-2 / -	2	Partial capture
09-19 04:56	60m	- / +2	PA1RC	-8 / -	3	✓ Closing fragment
09-19 04:52	60m	- / -	DL3FBI	-13 / -	3	Partial capture
09-19 04:43	60m	- / -	ES2HV	-10 / -	6	Partial capture
09-19 04:32	60m	- / -13	9A3ZI	+1 / -	6	✓ Closing fragment
09-19 04:24	60m	- / -	OE8IHT	-5 / -	2	Partial capture
09-19 04:16	60m	- / -10	DK2CC	-15 / -	4	✓ Closing fragment
09-19 04:16	60m	- / -	OH2BYJ	-8 / -	2	Partial capture
09-19 04:15	60m	- / -4	DB3ZY	+3 / -	2	✓ Closing fragment
09-19 04:04	60m	- / -	OH2BYJ	-7 / -	3	Partial capture
09-19 04:04	60m	- / -	DK2CC	-14 / -	2	Partial capture
09-19 03:47	60m	- / -	OH7TY	-14 / -	3	Partial capture
09-19 03:37	60m	- / +2	DG1KFR	-8 / -	6	✓ Closing fragment
09-19 03:37	60m	- / -17	IZ7DJS	0 / -	4	✓ Closing fragment
09-19 03:31	60m	- / -3	OZ3AEV	-9 / -	4	✓ Closing fragment
09-19 03:17	60m	- / +5	F1IGI	-4 / -	2	✓ Closing fragment
09-19 03:09	60m	- / -8	K2MTG	-16 / -	3	✓ Closing fragment
09-19 03:03	60m	- / -	OH7TY	-20 / -	2	Partial capture
09-19 02:35	60m	- / -8	W4KWS	-20 / -	3	✓ Closing fragment
09-19 02:05	60m	-21 / +2	F6ICX	-4 / -8	5	✓ Full exchange observed
09-19 02:01	60m	-20 / -	VE3XN	-21 / -16	4	Partial capture
09-19 01:50	60m	-18 / -	W4FZ	- / -17	2	✓ Closing fragment
09-19 01:23	60m	-19 / +4	EB2FBI	-10 / -16	4	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
233015  -7 1443  CT7ARQ PD4RJ JO33 (x6)
234330 -23  822  CQ CT7ARQ IN51 (x4)
234815  -8 1443  CT7ARQ PD4RJ JO33 (x3)
235500 -18  822  CQ CT7ARQ IN51                        a1 (x2)

60m

UTC    dB Audio  Message
045430 -14 1010  CT7ARQ DL3FBI JO40
045630 -10 2089  CT7ARQ PA1RC +02 (x3)
050230  -2 1456  CT7ARQ DL7UKM JO62
050300  -7 1254  CT7ARQ LB4PI JO59
050300  -3 1456  CT7ARQ DL7UKM JO62
050330  -1 1254  CT7ARQ LB4PI R-06 (x2)
051700 -10 1010  CT7ARQ DL3FBI JO40
054600  -6 1244  CT7ARQ DH9DR JO31 (x3)
060000  -3  266  CT7ARQ DL5EBS JO31
071600 -12  726  CT7ARQ DK1XAM JO42

80m

UTC    dB Audio  Message
050500 +12 1238  CT7ARQ DL4ME RR73
050900  -9 2018  CT7ARQ EA6Y JM19 (x6)
054730 -19 1452  CT7ARQ F1TXI -04 (x2)
223800 -22  251  CT7ARQ ON4MAP JO20 (x3)
230730 -21 2153  CT7ARQ F1PBZ -13 (x3)

20m

UTC    dB Audio  Message
170500 -15  855  CT7ARQ BA3NZ OM99 (x15)

10m

UTC    dB Audio  Message
105100 -10 2256  CT7ARQ GB2WWA -13

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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