AC9EM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FN65

Receiver-side FT8 activity involving AC9EM, decoded by SO8OO in southeastern Poland. 15 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-07-26 and 2026-09-10.

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 15 FT8 messages attributed to AC9EM as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (67%), followed by 80 m (27%) and 40 m (7%). In this small sample, the estimated median decoder S/N was -11 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-11 dB

Estimated median S/N

Bands

80m · 4 40m · 1 20m · 10

First attributed message: 2026-07-26
Last attributed message: 2026-09-10 00:46 UTC

Observed FT8 message patterns

Attributed sample: 15 messages
Active dates: 7 UTC dates
Estimated median S/N: -11 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 11, 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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with AC9EM in decoded directed-looking exchanges:

C91RU · Mozambique CN2DX · Morocco K2LNS · United States R2PT · 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 AC9EM

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: FN65 · 2 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 6,256 km (approx.)
Last such locator decoded: 2026-07-26 06:14 UTC

Other locator fields attributed to this token: FN64 (1) and FN22 (1).

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	AC9EM S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-10 00:47	80m	- / -	IW2MYH	-24 / -	2	Partial capture
09-10 00:47	80m	- / -	LY1DY	0 / -	3	Partial capture
09-10 00:47	80m	- / -6	DK7ZT	+1 / -	5	Partial capture
09-10 00:47	80m	- / -	PA3KUS	-10 / -	4	Partial capture
09-10 00:45	80m	-10 / -	R2PT	-2 / -14	4	✓ Closing observed
08-31 15:04	20m	- / -14	R2DRE	+6 / -	4	Partial capture
08-31 15:03	20m	- / -14	RX6DY	+6 / -	10	Partial capture
08-13 20:41	20m	-18 / -	KA0BOJ	- / -11	2	Partial capture
08-11 23:18	20m	- / -	IW2DNI	-5 / -	2	Partial capture
08-11 23:15	20m	- / +8	K2LNS	-16 / -	2	✓ Closing fragment
08-11 23:10	20m	- / -	IW2DNI	-6 / -	4	Partial capture
08-11 23:08	20m	- / -	IS0KNO	-15 / -	3	Partial capture
08-10 06:11	40m	- / -	DL8TV	-11 / -	3	Partial capture
08-08 05:47	20m	- / -	M0CSD	-19 / -	5	Partial capture
08-04 00:46	80m	- / -	F5RRS	+1 / -	5	Partial capture
08-04 00:46	80m	- / -	G3ZSU	+2 / -	2	Partial capture
07-26 06:16	20m	- / -	PA3KUS	-18 / -	2	Partial capture
07-26 06:14	20m	- / -4	IS0KNG	-14 / -	2	Partial capture
07-26 06:12	20m	-10 / -	CN2DX	- / +5	2	✓ Closing fragment
07-26 06:12	20m	- / -	IW2MYH	-22 / -	2	Partial capture
07-26 06:10	20m	-11 / -	C91RU	- / -5	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
004645 -11 1004  R2PT AC9EM RR73
004700  -4  541  AC9EM PA3KUS JO21
004700  +5 1110  AC9EM DK7ZT -06
004730  -8  541  AC9EM PA3KUS JO21
004730  +6 1004  AC9EM LY1DY KO14
004730 -24 1386  AC9EM IW2MYH JN45
004730  -1 1110  AC9EM DK7ZT -06
004800 -14  541  AC9EM PA3KUS JO21
004800  -3 1004  AC9EM LY1DY KO14
004800 -24 1386  AC9EM IW2MYH JN45
004800  +5 1110  AC9EM DK7ZT -06
004830 -12  541  AC9EM PA3KUS JO21
004830  -2 1004  AC9EM LY1DY KO14
004830  -3 1110  AC9EM DK7ZT -06 (x2)

40m

UTC    dB Audio  Message
040845 -10 1037  AC9EM HB9IRO JN46
045615  -8 2784  AC9EM IK0IHA -15
055915 -16 1038  AC9EM DH5BM JO41
061130 -11 2496  AC9EM DL8TV JN49 (x3)
055715 -24 1591  AC9EM G5TV IO93
052445  -9 1868  RI1FJL AC9EM R-05

20m

UTC    dB Audio  Message
150230 -10 2274  AC9EM RX0AT NO65
150315 +11 1940  AC9EM RX6DY -14 (x3)
150415  +9 2019  AC9EM R2DRE -14
150445 +13 1933  AC9EM RX6DY -14 (x2)
150515  +8 2019  AC9EM R2DRE -17
150545  +4 1929  AC9EM RX6DY -14 (x2)
150615  +2 2019  AC9EM R2DRE -17
150645  +8 1924  AC9EM RX6DY -14
150645  +5 2019  AC9EM R2DRE -17
150715  +1 1922  AC9EM RX6DY -14 (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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