UA4SAI — 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: European Russia Most frequent locator attributed to this token: LO45

Receiver-side FT8 activity involving UA4SAI, decoded by SO8OO in southeastern Poland. 42 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-18 and 2026-10-28.

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 42 FT8 messages attributed to UA4SAI as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (57%), followed by 40 m (43%). Several six-hour UTC windows tied for the largest share (98%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -5 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-5 dB

Estimated median S/N

Bands

40m · 18 20m · 24

First attributed message: 2026-06-18
Last attributed message: 2026-10-28 20:14 UTC

Observed FT8 message patterns

Attributed sample: 42 messages
Active dates: 7 UTC dates
Estimated median S/N: -5 dB
Estimated 10th-90th percentile: -17 to +5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 10, strong (≥ -8 dB) 24.

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 UA4SAI in decoded directed-looking exchanges:

DL1EDR · Fed. Rep. of Germany E70SZ · Bosnia-Herzegovina F4GIH · France IK4RVY · Italy JO4LUM · Japan R6YG · European Russia RA9ANC · Asiatic Russia RV9CX · Asiatic Russia RX3DRC · European Russia S51UN · Slovenia

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 UA4SAI

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: LO45 · 20 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,920 km (approx.)
Last such locator decoded: 2026-10-27 19:41 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	UA4SAI S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-28 20:23	40m	- / -9	F4GIH	+8 / -	2	✓ Closing fragment
10-27 19:33	40m	-14 / -6	RX3DRC	-11 / -	3	✓ Closing observed
10-27 19:23	40m	- / -12	IK4RVY	-1 / -	2	✓ Closing fragment
10-27 19:18	40m	- / -4	S51UN	-16 / -	2	✓ Closing fragment
10-27 19:08	40m	- / -7	RV9CX	-16 / -	2	✓ Closing fragment
10-27 19:03	40m	-14 / -	PA3GYF	-12 / -14	5	Partial capture
10-27 19:01	40m	-14 / -	E70SZ	- / -10	2	✓ Closing fragment
10-13 18:16	40m	-20 / 0	R6YG	-2 / -	3	✓ Closing observed
08-27 21:46	20m	- / -	5Z4VJ	-7 / -	2	Partial capture
08-20 20:49	40m	-1 / -	R3PLN/P	- / -	5	Partial capture
08-18 20:37	40m	- / -6	DL1EDR	+4 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
190845 -15 2475  UA4SAI RV9CX -07 (x2)
191815 -18 1280  UA4SAI S51UN R-04 (x2)
192345  -1 2107  UA4SAI IK4RVY -12 (x2)
192830 -18 1280  RA9ANC UA4SAI RR73
193330  -9 2073  UA4SAI RX3DRC R-06
193345 -14 1280  RX3DRC UA4SAI RR73
193400 -13 2072  UA4SAI RX3DRC 73
193815 -16 1280  TN8GD UA4SAI LO45 (x2)
201430  -9 2251  IZ4EFV UA4SAI -14
202315  +5 2912  UA4SAI F4GIH -09 (x2)

20m

UTC    dB Audio  Message
214600  -5 2165  UA4SAI 5Z4VJ KI88 (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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