EA4ESM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Spain

Receiver-side FT8 activity involving EA4ESM, decoded by SO8OO in southeastern Poland. 23 FT8 messages attributed to this token as transmitter, on 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-16 and 2026-08-31.

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 23 FT8 messages attributed to EA4ESM 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 (100%). Most decodes (61%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's moderate S/N range (74%); the estimated median was -12 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

20m · 23

First attributed message: 2026-06-16
Last attributed message: 2026-08-31 18:00 UTC

Observed FT8 message patterns

Attributed sample: 23 messages
Active dates: 7 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -19 to -10 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 17, strong (≥ -8 dB) 2.

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 EA4ESM in decoded directed-looking exchanges:

DO1JMS · Fed. Rep. of Germany ON4MGV · Belgium RN3DN · European Russia 7Z1BQ · Saudi Arabia M0LAD · England SV7LYG · Greece ON4PRA · Belgium DD6ZV · Fed. Rep. of Germany DL1AA · Fed. Rep. of Germany DL1SRS · Fed. Rep. of Germany EA3EDU · Spain EH1PDA · Spain

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.

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	EA4ESM S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-09 20:53	80m	- / +9	PI4DX	-12 / -	2	✓ Closing fragment
09-09 20:46	60m	- / -2	G4ZFJ	+1 / -	3	✓ Closing fragment
09-09 20:43	60m	- / +4	DL1AA	+12 / -	2	✓ Closing fragment
09-09 20:40	60m	- / -	G0AZH	-4 / -	2	✓ Closing fragment
09-09 20:37	60m	- / -9	DD6ZV	+4 / -	3	✓ Closing fragment
09-09 20:34	60m	- / -1	EA3EDU	-8 / -	4	✓ Closing fragment
09-09 20:33	60m	- / -7	EH1PDA	-12 / -	2	✓ Closing fragment
09-09 20:31	60m	- / -7	DL1SRS	-4 / -	5	✓ Closing fragment
09-09 20:27	60m	- / -13	OZ7DR	+1 / -	3	✓ Closing fragment
09-09 20:26	60m	- / -	SP5JMA	+2 / -	3	Partial capture
08-29 10:07	20m	- / -24	G3AKA	-4 / -	2	Partial capture
08-23 15:16	10m	- / -2	II7MGBT	-10 / -	2	Partial capture
08-13 19:26	20m	-11 / -	7Z1BQ	- / -8	2	✓ Closing fragment
07-13 16:29	20m	-19 / -	SV7LYG	- / -5	3	✓ Closing fragment
07-13 15:59	20m	-12 / -	4L1MA	- / -11	2	Partial capture
07-07 18:41	10m	- / -8	RN3DN	-4 / -	2	✓ Closing fragment
07-07 18:36	10m	- / -	DO1JMS	-13 / -	2	✓ Closing fragment
07-06 20:59	20m	-18 / -	M8LKK	- / -14	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
205315  -7  929  EA4ESM PI4DX R+09 (x2)

60m

UTC    dB Audio  Message
203445  -9 2184  EA4ESM EA3EDU JN01
203445  -3 1144  EA4ESM DL1SRS 73
203515  -7 2184  EA4ESM EA3EDU JN01 (x3)
203745  +4  908  EA4ESM DD6ZV JO62 (x3)
204015  -3  679  EA4ESM G0AZH IO83 (x2)
204315 +12 2905  EA4ESM DL1AA R+04 (x2)
204600  +0  843  EA4ESM G4ZFJ JO01 (x3)

20m

UTC    dB Audio  Message
205900 -21 2071  M8LKK EA4ESM -14 (x2)
155600 -14  799  <...> EA4ESM -06
155900 -14  800  4L1MA EA4ESM -11 (x2)
162945 -20 1337  SV7LYG EA4ESM -05 (x3)
192615 -12  629  7Z1BQ EA4ESM -08 (x2)
084800 -13  810  EA4ESM M0LAD 73
100715  -6 2549  EA4ESM G3AKA R-24 (x2)
101030  -3 2775  EA4ESM ON1PK R-12
180015 -10  544  CU2JX EA4ESM -12

10m

UTC    dB Audio  Message
192015 +11  514  EA4ESM IW2MYH JN45
164545 -19 1178  EA4ESM ON4MGV 73
183600 -12 2255  EA4ESM DO1JMS R+14 (x2)
184145  -6  475  EA4ESM RN3DN R-08 (x2)
151615 -10 1748  EA4ESM II7MGBT R-02 (x2)

40m

UTC    dB Audio  Message
212045  -8 1536  EA4ESM ON4PRA 73

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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