EP3ISF — 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: Iran Most frequent locator attributed to this token: LM52

Receiver-side FT8 activity involving EP3ISF, decoded by SO8OO in southeastern Poland. 7 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 2 UTC dates in the available aggregate history. Observed between 2026-08-04 and 2026-09-25.

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 7 FT8 messages attributed to EP3ISF as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (86%), followed by 10 m (14%). In this small sample, the estimated median decoder S/N was -21 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-21 dB

Estimated median S/N

Bands

20m · 6 10m · 1

First attributed message: 2026-08-04
Last attributed message: 2026-09-25 11:26 UTC

Observed FT8 message patterns

Attributed sample: 7 messages
Active dates: 2 UTC dates
Estimated median S/N: -21 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 1, strong (≥ -8 dB) 0.

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 EP3ISF in decoded directed-looking exchanges:

LY3W · Lithuania F5ASD · France OM7TJ · Slovak Republic V31DL · Belize WM4W · United States

Most frequent locator attributed to EP3ISF

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: LM52 · 3 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 3,085 km (approx.)
Last such locator decoded: 2026-08-04 18:19 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	EP3ISF S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-21 19:58	40m	- / -	EA6Y	+14 / -	7	Partial capture
10-21 19:54	40m	- / -	Z34K	-2 / -	12	Partial capture
10-03 22:44	40m	- / -	RN6HK	+2 / -	2	Partial capture
08-07 10:14	20m	- / -	DH2RL	-6 / -	4	Partial capture
08-07 00:21	20m	- / -14	V31DL	-9 / -	6	✓ Closing fragment
08-07 00:20	20m	- / -	LZ1BK	-11 / -	2	Partial capture
08-04 18:26	20m	- / -	EA7ALL	+2 / -	11	Partial capture
08-04 18:23	20m	- / -	OH8SR	-6 / -	4	Partial capture
08-04 18:23	20m	- / -	OZ8ABA	+7 / -	4	Partial capture
08-04 18:20	20m	- / -	EA7ALL	+8 / -	6	Partial capture
08-04 18:19	20m	- / -	EA3AAY	-7 / -	9	Partial capture
08-04 18:19	20m	- / -	F4GGJ	+3 / -	4	Partial capture
08-04 18:17	20m	- / -	G6TEQ	-4 / -	2	Partial capture
08-04 18:16	20m	-20 / -	OM7TJ	- / -	3	✓ Closing fragment
08-04 18:16	20m	- / -	OZ8ABA	+2 / -	6	Partial capture
08-04 18:12	20m	- / -	F5ASD	-18 / -	2	✓ Closing fragment
08-04 18:11	20m	- / -	EA3NT	0 / -	19	Partial capture
08-04 18:11	20m	- / -	OZ8ABA	+5 / -	7	Partial capture
08-04 18:06	20m	- / -	EA2DYB	+5 / -	7	Partial capture
08-04 18:01	20m	- / -	EA2DYB	+2 / -	6	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
195700  -3  704  EP3ISF Z34K KN01 (x4)
195830 +14  567  EP3ISF EA6Y JM19
195900  +1  704  EP3ISF Z34K KN01
195900 +15  567  EP3ISF EA6Y JM19
195930  -9  704  EP3ISF Z34K KN01
195930 +11  567  EP3ISF EA6Y JM19
200000  -4  704  EP3ISF Z34K KN01
200000 +20  567  EP3ISF EA6Y JM19
200030  -3  704  EP3ISF Z34K KN01
200030 +10  567  EP3ISF EA6Y JM19 (x3)

10m

UTC    dB Audio  Message
112630 -21 1958  LY3W EP3ISF RR73

20m

UTC    dB Audio  Message
002100 -11  917  EP3ISF V31DL EK57
002100 -13 2080  EP3ISF LZ1BK KN22
002130  -9  918  EP3ISF V31DL EK57 (x5)
004430 -24 1692  EP3ISF EA5W R-26 (x3)
010300 -21 2078  EP3ISF WM4W RR73
101445 -10 2101  EP3ISF DH2RL JN68 (x4)

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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