AJ4A — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM77

Receiver-side FT8 activity involving AJ4A, decoded by SO8OO in southeastern Poland. 39 FT8 messages attributed to this token as transmitter, on 80m, 40m, 10m, across 5 UTC dates in the available aggregate history. Observed between 2026-08-29 and 2026-10-17.

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 39 FT8 messages attributed to AJ4A as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (67%), followed by 80 m (31%) and 10 m (3%). Several six-hour UTC windows tied for the largest share (97%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -17 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

80m · 12 40m · 26 10m · 1

First attributed message: 2026-08-29
Last attributed message: 2026-10-17 12:35 UTC

Observed FT8 message patterns

Attributed sample: 39 messages
Active dates: 5 UTC dates
Estimated median S/N: -17 dB
Estimated 10th-90th percentile: -24 to -10 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 20, moderate (-15 to -9 dB) 18, strong (≥ -8 dB) 1.

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 AJ4A in decoded directed-looking exchanges:

F5RRS · France ×2 DL5BCQ · Fed. Rep. of Germany S79VU · Seychelles FR5CB · Reunion Island 5Z4VJ · Kenya CX2SA · Uruguay EC3A · Spain ER3PM · Moldova F5PBG · France LU8EKC · Argentina M7SYR · England R7CD · European Russia

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 AJ4A

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: EM77 · 6 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,943 km (approx.)
Last such locator decoded: 2026-09-25 03:25 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	AJ4A S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-25 03:29	40m	- / -18	EA5D	-11 / -	4	Partial capture
09-25 03:27	40m	-20 / -7	R7CD	-1 / -	2	✓ Closing observed
09-25 03:19	40m	- / -	IU8RFW	-16 / -	5	Partial capture
09-25 03:14	40m	- / -13	EC3A	-4 / -	7	✓ Closing fragment
09-25 03:13	40m	- / -	IU8RFW	-10 / -	3	Partial capture
09-25 01:16	80m	- / -14	ON6AA	+13 / -	3	✓ Closing fragment
09-21 23:49	40m	-11 / -14	M7SYR	-3 / -14	5	✓ Full exchange observed
09-21 23:48	40m	-10 / -	CX2SA	- / -9	3	✓ Closing fragment
09-21 23:46	40m	-12 / -	LU8EKC	- / -10	2	✓ Closing fragment
09-21 23:44	40m	-10 / -20	F5RRS	+6 / -	5	✓ Closing observed
09-21 23:42	40m	- / -	TA2EE	-16 / -	2	Partial capture
09-21 23:41	40m	- / -	PE1NPS	-4 / -	3	Partial capture
09-21 23:41	40m	- / -	RD3FY	+8 / -	4	Partial capture
09-21 23:39	40m	-10 / -7	F5PBG	-6 / -14	9	✓ Full exchange observed
09-21 23:37	40m	-12 / -	ER3PM	-16 / +2	4	✓ Closing observed
09-21 23:36	40m	- / -	IT9JNN	-15 / -	3	Partial capture
09-11 00:33	40m	- / -	UX1VT	-10 / -	3	Partial capture
09-11 00:32	40m	-19 / -	VP5/K5UR	- / +9	2	Partial capture
09-11 00:26	40m	-11 / -	IH9/IT9JUI	- / -	2	Partial capture
09-09 01:07	40m	- / -24	5Z4VJ	-6 / -	4	✓ Closing fragment
08-29 03:23	80m	- / -	ZW5B	-19 / -	3	✓ Closing fragment
08-29 03:22	80m	- / -18	EI2GLB	+9 / -	2	✓ Closing fragment
08-29 03:06	80m	- / -19	F5RRS	+5 / -	3	✓ Closing fragment
08-29 03:05	80m	- / -3	EA5CRC	-1 / -	2	✓ Closing fragment
08-29 03:01	80m	- / -	US2YW	-11 / -	3	Partial capture
08-29 03:00	80m	- / -	IW9FRA	-18 / -	6	Partial capture
08-29 03:00	80m	- / -14	US8UX	-3 / -	5	Partial capture
08-29 02:59	80m	-21 / -13	DO1ID	+10 / -15	9	✓ Full exchange observed
08-29 02:57	80m	- / -9	9A5E	+12 / -	2	✓ Closing fragment
08-29 02:54	80m	- / -16	DK5WL	+6 / -	4	✓ Closing fragment
08-29 02:51	80m	-24 / -	KF9TS	- / +4	2	Partial capture
08-29 02:47	80m	-20 / -	N7GDW	- / -19	4	Partial capture
08-29 02:47	80m	- / -5	DO1ID	+17 / -	7	Partial capture
08-29 01:59	40m	- / -	HA7JDU	-21 / -	3	Partial capture
08-07 04:45	60m	- / -19	OZ7FOC	-17 / -	9	Partial capture

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
044545 -19 1251  AJ4A OZ7FOC -19 (x9)
015800 -14 1118  AJ4A P4/WE9V -08
015830 -14 1118  AJ4A RR73; VE3EY <...> +08

10m

UTC    dB Audio  Message
123530 -18 2356  S79VU AJ4A 73
125515  -2 3000  AJ4A DN9MSG R+14
130745 -14 2302  AJ4A DL5BCQ JO42 (x2)
132345  -5 2969  AJ4A OH1EDK KP01

40m

UTC    dB Audio  Message
031730  -5 2262  AJ4A EC3A R-15 (x2)
031930 -14 2103  AJ4A IU8RFW JN70 (x5)
032500 -21 2175  LZ936BA AJ4A EM77
032730  -1 2268  AJ4A R7CD -07
032815 -20 2174  R7CD AJ4A 73
032900 -11 1817  AJ4A EA5D JN00 (x4)
233715  -8 2604  AJ4A F5PBG IN78

80m

UTC    dB Audio  Message
030345 -15 1460  AJ4A IW9FRA JM68
030445  +5 1890  AJ4A IZ8VYU JN71
030500  +0 1404  AJ4A EA5CRC -03 (x2)
030600  +1 1962  AJ4A F5RRS JN36 (x3)
032200  +9 2642  AJ4A EI2GLB -18 (x2)
032300 -21 2393  AJ4A ZW5B GG54 (x3)
011600 +11 1158  AJ4A ON6AA JO11 (x3)

20m

UTC    dB Audio  Message
040645 -15  882  AJ4A FR5CB RR73

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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