IU5TPM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN53

Receiver-side FT8 activity involving IU5TPM, decoded by SO8OO in southeastern Poland. 1,428 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 73 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-09.

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 1,428 FT8 messages attributed to IU5TPM as the transmitting token by decoded message structure across 73 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (71%), followed by 10 m (14%) and 40 m (13%). The busiest six-hour window was 05:00-11:00 UTC, containing 40% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

1,428

Messages attributed

UTC dates decoded

402

Active 15-min windows

-10 dB

Estimated median S/N

Bands

80m · 20 40m · 190 20m · 1,016 10m · 202

First attributed message: 2026-06-07
Last attributed message: 2026-09-09 22:49 UTC

Observed FT8 message patterns

Attributed sample: 1,428 messages
Active dates: 73 UTC dates
Estimated median S/N: -10 dB
Estimated 10th-90th percentile: -19 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 336, moderate (-15 to -9 dB) 489, strong (≥ -8 dB) 603.

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 IU5TPM in decoded directed-looking exchanges:

F4JQH · France ×2 F4HSB · France ×2 R4HGK · European Russia ×2 RW4YD · European Russia ×2 HP1RY · Panama UA3SNB · European Russia PA2KV · Netherlands OE3GJC · Austria IQ6MC · Italy UK8OM · Uzbekistan OM3CUP · Slovak Republic RX6DA · 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 IU5TPM

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 · 792 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,089 km (approx.)
Last such locator decoded: 2026-09-09 22:49 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	IU5TPM S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-08 14:15	40m	-14 / -	DL4MBY	-13 / -5	2	Partial capture
09-08 14:15	40m	-18 / +2	I8OHQ	-16 / +2	4	✓ Full exchange observed
09-08 14:13	40m	-16 / -13	SP9HAX	+4 / -9	4	✓ Full exchange observed
09-07 17:42	40m	-7 / -	SQ3RX	- / -	3	Partial capture
09-07 17:18	40m	-12 / -11	DK9WI	+4 / -4	4	✓ Full exchange observed
09-06 16:23	40m	- / +4	OZ7KJ/P	-11 / -	5	✓ Closing fragment
09-06 05:16	40m	-4 / -	K5XI	- / -	3	Partial capture
09-02 09:54	10m	-12 / -	SP3Q	- / -	4	Partial capture
09-02 03:13	40m	+6 / -	KI9A	- / -	4	Partial capture
09-02 02:25	40m	+7 / -	KI9A	- / -	3	Partial capture
09-02 02:22	40m	+5 / -	KA1ERL	- / -	4	Partial capture
09-02 02:12	40m	-3 / -	AA1ZZ	- / -	4	Partial capture
08-31 15:22	40m	-12 / -11	OE2CAL	+4 / +6	3	✓ Full exchange observed
08-30 16:01	20m	-12 / -	<...>	- / -	4	Partial capture
08-29 18:15	20m	+2 / -	OE3CMW	- / -	2	Partial capture
08-29 18:06	20m	+8 / -	OE3CMW	- / -	4	Partial capture
08-29 18:00	20m	-2 / -	OE3CMW	- / -	3	Partial capture
08-29 01:07	40m	-7 / -	WW5G	- / -	3	Partial capture
08-28 05:23	20m	-18 / -	SP3OCC	- / -	3	Partial capture
08-27 19:42	80m	-2 / -	HA1BB	- / +7	3	Partial capture
08-27 00:46	40m	-3 / -	KE8UOH	- / -18	2	✓ Closing fragment
08-27 00:43	40m	0 / -	KA1MXL	- / -	8	Partial capture
08-27 00:38	40m	-2 / -	RI1FJL	- / -	2	Partial capture
08-27 00:14	40m	-9 / -	NG0Z	- / -1	5	✓ Closing fragment
08-26 16:49	20m	-1 / -	YO9IBC	- / -5	4	✓ Closing fragment
08-25 19:35	20m	+9 / -	SP7TAC	- / +9	3	Partial capture
08-25 19:29	20m	+3 / -	BU2FW	- / -17	5	✓ Closing fragment
08-25 18:55	20m	+8 / -	DA1EE	- / -	2	✓ Closing fragment
08-23 06:59	20m	-6 / -5	F4JXY/P	-22 / -17	6	✓ Full exchange observed
08-22 11:33	10m	-14 / -	SP3DSC	- / -	3	✓ Closing fragment
08-22 10:40	10m	-18 / -	UT5VQ	- / +8	2	✓ Closing fragment
08-22 10:39	10m	-17 / -	PE9JAN	-22 / -	3	Partial capture
08-22 10:37	10m	-14 / -	OE5HMR	- / -15	4	✓ Closing fragment
08-22 05:47	20m	+14 / -	SQ3RX	- / -	2	Partial capture
08-22 05:16	20m	+6 / -	KD7ZAL	- / -	2	Partial capture
08-21 16:53	20m	-12 / -	TK5AE	- / -	2	Partial capture
08-21 12:50	20m	+10 / -12	<...>	-8 / -12	3	Partial capture
08-20 22:10	20m	-2 / -	WY0V	- / -13	7	Partial capture
08-20 14:56	20m	-8 / -7	CT1END/P	-17 / -25	3	Partial capture
08-20 06:00	40m	-9 / -	KA1MXL	- / -	2	Partial capture
08-18 10:42	20m	-20 / -	EJ4GRC	- / -	4	✓ Closing fragment
08-17 17:11	20m	0 / -	9J2MM	- / -	3	Partial capture
08-16 18:34	40m	- / -5	SQ2GXO	0 / -	2	✓ Closing fragment
08-16 17:28	20m	-14 / -	CT2JJT	- / -16	4	✓ Closing fragment
08-15 19:16	20m	-13 / -	JH3OWW	- / -14	4	✓ Closing fragment
08-15 18:55	20m	0 / -	DK7SB	-11 / -	2	✓ Closing observed
08-15 08:40	20m	-10 / -	9A2DM	- / -14	3	✓ Closing fragment
08-12 20:46	20m	-8 / -	K0DTM	- / -20	2	Partial capture
08-12 15:22	20m	-16 / -	DF3MT	- / -	2	✓ Closing fragment
08-12 08:32	40m	- / -22	SP3TYJ	-24 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
174330  -3 2388  SQ3RX IU5TPM JN53
061315 -16  787  IH9/IT9JUI IU5TPM R-01
061445 -15 2068  KS4OT IU5TPM JN53
141345  +4 2361  IU5TPM SP9HAX -13
141400 -16 2360  SP9HAX IU5TPM R-09
141415  +5 2361  IU5TPM SP9HAX RR73
141430 -17 2360  SP9HAX IU5TPM 73
141515 -16 2298  IU5TPM I8OHQ +02
141530 -18 2360  I8OHQ IU5TPM R+02
141545 -13  694  IU5TPM DL4MBY JN57
141545 -15 2298  IU5TPM I8OHQ RR73
141600 -17 2360  I8OHQ IU5TPM 73
141700 -14  694  DL4MBY IU5TPM -05
220945 -17 2204  KA1ERL IU5TPM JN53
224945 -13  346  W1KFR IU5TPM JN53

80m

UTC    dB Audio  Message
212545 -11 1078  RA4FW IU5TPM 73
212815  -7 2060  DO1SWC IU5TPM JN53 (x2)
212900 -10 2060  IU5TPM DO1SWC -06
212915 -15 2060  DO1SWC IU5TPM R-03
212930  -7 2060  IU5TPM DO1SWC RR73
212945  -8 2060  DO1SWC IU5TPM 73
213145  -8 2060  IU5HIU IU5TPM RR73
213200 -13 1079  IU5TPM IU5HIU 73
194230  -2 1293  HA1BB IU5TPM +07 (x3)
010230 -13 1371  DF2GH IU5TPM JN53
010445  -9 1428  W8LRL IU5TPM JN53
001530  +9  802  IU5TPM SM7/DL5BTE -09

10m

UTC    dB Audio  Message
103730  -9 2041  OE5HMR IU5TPM JN53 (x3)
103945 -23 1737  IU5TPM PE9JAN JO22
104000 -19 2009  UT5VQ IU5TPM R+08 (x2)
104045 -20 1737  IU5TPM PE9JAN JO22
104100 -17 1738  PE9JAN IU5TPM +18
113315 -12 2223  SP3DSC IU5TPM JN53 (x3)
095400 -11 1997  SP3Q IU5TPM +20 (x4)

20m

UTC    dB Audio  Message
180415  +2  772  FR5FK IU5TPM JN53
180630  +2 2667  OE3CMW IU5TPM JN53 (x6)
153030  -9 1958  EI3KE IU5TPM JN53
160115 -12 1520  <...> IU5TPM JN53 (x4)
195715  -3 2428  OM2IDN IU5TPM JN53
090230  +3 2145  SP3Q IU5TPM JN53 (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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