IS0UDF — 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: Sardinia Most frequent locator attributed to this token: JN40

Receiver-side FT8 activity involving IS0UDF, decoded by SO8OO in southeastern Poland. 20 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 10 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-03.

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 20 FT8 messages attributed to IS0UDF as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (40%), followed by 20 m (30%) and 40 m (15%). Most decodes (95%) fell within the six-hour window 18:00-00:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (75%); the estimated median was -21 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-21 dB

Estimated median S/N

Bands

80m · 8 40m · 3 20m · 6 10m · 3

First attributed message: 2026-06-07
Last attributed message: 2026-10-03 22:45 UTC

Observed FT8 message patterns

Attributed sample: 20 messages
Active dates: 10 UTC dates
Estimated median S/N: -21 dB
Estimated 10th-90th percentile: -24 to -5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 1, strong (≥ -8 dB) 4.

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 IS0UDF in decoded directed-looking exchanges:

DO1IJB · Fed. Rep. of Germany F1PBZ · France F5RRS · France SV9MBH · Crete

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 IS0UDF

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: JN40 · 12 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,447 km (approx.)
Last such locator decoded: 2026-10-03 22:45 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	IS0UDF S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-03 22:44	40m	-21 / -	K1RH	- / -	2	Partial capture
09-25 22:44	80m	- / -18	DO1IJB	-4 / -	5	✓ Closing fragment
09-25 22:44	80m	-21 / -20	F5RRS	-5 / -	4	✓ Closing observed
09-25 22:41	80m	- / -19	F1PBZ	0 / -	2	✓ Closing fragment
09-25 22:34	80m	- / -22	IQ4JO	+9 / -	2	Partial capture
09-10 23:12	80m	- / -	LZ2VQ	+8 / -	3	Partial capture
09-10 23:11	80m	-19 / -18	SV9MBH	-5 / -	3	✓ Closing observed
09-10 23:00	80m	- / -	IU2VBP	-4 / -	4	Partial capture
09-10 22:56	80m	-24 / -14	PA3KUS	+7 / -16	12	Partial capture
08-20 18:29	20m	-4 / -	XU7O	- / -	2	Partial capture
08-20 18:22	20m	-6 / -	XU7O	- / -	2	Partial capture
07-27 22:57	20m	- / -	EA6UE	-12 / -	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
143945 -15 1738  IS0UDF IR7MGGC -01
224430 -21 1606  K1RH IS0UDF JN40 (x2)

80m

UTC    dB Audio  Message
231245  +3 1486  IS0UDF LZ2VQ KN23 (x2)
223415  +8 2271  IS0UDF IQ4JO JN63 (x2)
224100  -2 2702  IS0UDF F1PBZ -19 (x2)
224430  -5 1988  IS0UDF F5RRS JN36
224430  -3 1841  IS0UDF DO1IJB JN48
224500  -5 1988  IS0UDF F5RRS R-20 (x2)
224530  -6 1841  IS0UDF DO1IJB JN48
224545 -21 1485  F5RRS IS0UDF RR73
224630  -6 1841  IS0UDF DO1IJB JN48 (x3)

10m

UTC    dB Audio  Message
095630 -22 1702  IS0UDF EX7CQ -18

20m

UTC    dB Audio  Message
225700  -9 1841  IS0UDF EA6UE JM19 (x2)
182245  -4 1310  XU7O IS0UDF JN40 (x5)

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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