IU1RVT — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN45

Receiver-side FT8 activity involving IU1RVT, decoded by SO8OO in southeastern Poland. 64 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-08-03.

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 64 FT8 messages attributed to IU1RVT as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (81%), followed by 10 m (19%). Most decodes (61%) fell within the six-hour window 07:00-13:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

20m · 52 10m · 12

First attributed message: 2026-06-06
Last attributed message: 2026-08-03 17:34 UTC

Observed FT8 message patterns

Attributed sample: 64 messages
Active dates: 5 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -17 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 12, moderate (-15 to -9 dB) 25, strong (≥ -8 dB) 27.

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 IU1RVT in decoded directed-looking exchanges:

FK8HA · New Caledonia HA7TM · Hungary A61SD · United Arab Emirates BG4UVR · China DB1EF · Fed. Rep. of Germany DG5DR · Fed. Rep. of Germany DL4GHS · Fed. Rep. of Germany EA2BHE · Spain F4BJN · France JA0LFV · Japan K5ATN · United States LX1RFJ · Luxembourg

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 IU1RVT

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: JN45 · 30 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,075 km (approx.)
Last such locator decoded: 2026-08-03 17:34 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	IU1RVT S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-03 17:33	20m	-3 / -	XW4KV	- / -	3	Partial capture
07-31 16:49	20m	-6 / +9	F4BJN	-13 / -8	4	✓ Full exchange observed
07-31 16:46	20m	-6 / -5	A61SD	-11 / -5	6	✓ Full exchange observed
07-31 16:44	20m	-5 / -	A41ZZ	- / -16	2	Partial capture
07-26 10:37	20m	-9 / -	RW1AX	- / -10	2	Partial capture
07-26 10:36	20m	-9 / -	PD1HBL	- / -5	2	✓ Closing fragment
07-26 10:33	20m	-16 / -	DG5DR	- / -6	2	✓ Closing fragment
07-25 17:52	20m	-5 / -7	EA2BHE	-15 / -11	6	✓ Full exchange observed
07-25 17:49	20m	- / -17	JA0LFV	-20 / -	2	✓ Closing fragment
07-25 17:49	20m	-3 / 0	RN6MA	-2 / -	4	✓ Closing observed
07-25 08:30	10m	-16 / -	C91RU	- / -	4	Partial capture
07-25 08:12	20m	-11 / -	5B4ARQ	- / -9	2	Partial capture
07-25 08:09	20m	-14 / -	DB1EF	-24 / -11	6	✓ Closing observed
07-25 08:08	20m	-18 / -	SP6AMI	- / -6	2	✓ Closing fragment
07-25 08:06	20m	- / -18	EB3JT	-6 / -	8	Partial capture
07-25 08:01	20m	- / -23	Z62NS	-12 / -	3	Partial capture
07-25 07:57	10m	-9 / -	HA7TM	- / +1	2	✓ Closing fragment
07-25 07:54	10m	-15 / -	FK8HA	- / -13	4	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
164700  -9 1574  A61SD IU1RVT JN45 (x2)
164745 -11  765  IU1RVT A61SD -05
164800  -3 1574  A61SD IU1RVT R-04 (x2)
164900  -7 1574  F4BJN IU1RVT -08
164915 -12 1576  IU1RVT F4BJN R+09
164930  -6 1574  F4BJN IU1RVT RR73
164945 -14 1577  IU1RVT F4BJN 73
172345 -21 1929  IU1RVT LX1RFJ RR73
172845  -1 1575  ZL1GT IU1RVT JN45
173045 -12 1575  XW4KV IU1RVT JN45 (x4)

10m

UTC    dB Audio  Message
075415 -21 1593  FK8HA IU1RVT JN45 (x4)
075645  -8 1593  CQ IU1RVT JN45
075715 -11 1593  HA7TM IU1RVT +01 (x2)
075815 -10 1593  CQ IU1RVT JN45
083045 -10 1589  C91RU IU1RVT JN45 (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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee