IU5FFM — 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: Italy Most frequent locator attributed to this token: JN53

Receiver-side FT8 activity involving IU5FFM, decoded by SO8OO in southeastern Poland. 53 FT8 messages attributed to this token as transmitter, on 60m, 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-10-22.

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 53 FT8 messages attributed to IU5FFM 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 (55%), followed by 20 m (43%) and 60 m (2%). Several six-hour UTC windows tied for the largest share (98%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (68%); the estimated median was -6 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-6 dB

Estimated median S/N

Bands

60m · 1 40m · 29 20m · 23

First attributed message: 2026-06-11
Last attributed message: 2026-10-22 07:27 UTC

Observed FT8 message patterns

Attributed sample: 53 messages
Active dates: 5 UTC dates
Estimated median S/N: -6 dB
Estimated 10th-90th percentile: -18 to +4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 10, moderate (-15 to -9 dB) 7, 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 IU5FFM in decoded directed-looking exchanges:

DL1FAM · Fed. Rep. of Germany HB9XBY · Switzerland OK2CAT · Czech Republic OZ1ESA · Denmark RD3FY · European Russia RN2F · Kaliningrad TI5RR · Costa Rica YU7XL · Serbia 9A4ZM · Croatia OA4ENG · Peru XE1SWW · Mexico

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 IU5FFM

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: JN53 · 27 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,089 km (approx.)
Last such locator decoded: 2026-10-22 07:26 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	IU5FFM S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-22 07:23	40m	-6 / -	TO4A	- / -11	8	Partial capture
10-22 07:16	40m	-3 / -	HK4EIC	- / -	7	Partial capture
10-22 07:15	40m	-12 / -	TO4A	- / -	2	Partial capture
10-22 07:07	40m	-7 / -	DB4VI/P	- / -15	6	Partial capture
08-20 08:40	20m	+6 / -	YU7XL	- / -5	2	✓ Closing fragment
08-20 08:37	20m	+4 / +2	DL1FAM	+12 / +6	8	✓ Full exchange observed
08-20 08:37	20m	-1 / -	OK2CAT	- / +3	3	✓ Closing fragment
08-20 08:35	20m	- / -	RX3VF	-2 / -	2	Partial capture
08-20 08:34	20m	+2 / -	RD3FY	-21 / -2	3	✓ Closing observed
08-20 08:32	20m	+3 / -	OZ1ESA	- / +2	4	✓ Closing fragment
08-20 08:28	20m	-10 / -	RN2F	- / 0	4	✓ Closing fragment
08-20 08:13	20m	- / -	DL3MIB	-2 / -	6	Partial capture
08-20 08:11	20m	-6 / -7	HB9XBY	-17 / +3	4	✓ Full exchange observed
08-11 07:03	20m	-17 / -	TI5RR	- / -8	3	✓ Closing fragment
08-11 06:41	40m	- / -3	9A4ZM	-21 / -	2	✓ Closing fragment
08-11 06:37	40m	-18 / -	XE1SWW	- / -24	3	✓ Closing fragment
08-11 06:31	40m	- / -	9A4ZM	-14 / -	3	Partial capture
08-11 06:29	40m	-20 / -	OA4ENG	- / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
071615 -10 1716  HK4EIC IU5FFM JN53 (x7)
072345  -6 1182  TO4A IU5FFM JN53 (x8)

60m

UTC    dB Audio  Message
162615  -1 1585  H49A IU5FFM JN53

20m

UTC    dB Audio  Message
083545  -3 1820  IU5FFM RX3VF LO06 (x2)
083715  -2 1820  OK2CAT IU5FFM JN53
083730  +6 2322  IU5FFM DL1FAM JN49
083745  +1 1820  OK2CAT IU5FFM R+03 (x2)
083830 +14 2322  IU5FFM DL1FAM JN49 (x3)
083945  +4 1820  DL1FAM IU5FFM +06
084000  +6 2322  IU5FFM DL1FAM R+02
084015  +3 1820  DL1FAM IU5FFM RR73
084030 +10 2322  IU5FFM DL1FAM 73
084045  +4 1820  YU7XL IU5FFM R-05 (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.

CW

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

Explore CW reception at SO8OO

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