UX4AA — 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: Ukraine Most frequent locator attributed to this token: KO70

Receiver-side FT8 activity involving UX4AA, decoded by SO8OO in southeastern Poland. 233 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 18 UTC dates in the available aggregate history. Observed between 2026-06-14 and 2026-11-01.

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 233 FT8 messages attributed to UX4AA as the transmitting token by decoded message structure across 18 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (78%), followed by 80 m (14%) and 10 m (6%). Most decodes (80%) fell within the six-hour window 09:00-15:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -6 dB.

Overview

233
Messages attributed
18
UTC dates decoded
36
Active 15-min windows
-6 dB
Estimated median S/N

Bands

80m · 33 40m · 3 20m · 182 10m · 15
First attributed message: 2026-06-14
Last attributed message: 2026-11-01 06:21 UTC

Observed FT8 message patterns

Attributed sample
233 messages
Active dates
18 UTC dates
Estimated median S/N
-6 dB
Estimated 10th-90th percentile
-17 to +5 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 32, moderate (-15 to -9 dB) 62, strong (≥ -8 dB) 139.

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 UX4AA in decoded directed-looking exchanges:

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 UX4AA

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
KO70 · 97 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
941 km (approx.)
Last such locator decoded
2026-11-01 06:17 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 UTCBandUX4AA S/NCounterpartCounterpart S/NMsgsCapture
11-01 06:23 80m - / - SQ2BXI -16 / - 2 Partial capture
11-01 06:21 80m - / -14 F4FSY -5 / - 3 Partial capture
11-01 06:20 80m -8 / -15 F5MXH -7 / -19 6 ✓ Full exchange observed
11-01 06:18 80m -3 / - OM2IB +13 / - 2 ✓ Closing observed
11-01 06:17 80m -12 / - G3RWF - / -16 3 ✓ Closing fragment
11-01 06:13 80m -5 / +3 OM2IB +12 / -5 5 Partial capture
11-01 06:10 80m - / +6 UR5FLN -4 / - 2 ✓ Closing fragment
11-01 06:08 80m -8 / - 5B4AMX - / -15 3 ✓ Closing fragment
10-31 11:41 80m -22 / - US5AA -21 / - 7 ✓ Closing observed
10-31 11:38 80m - / - US5AA -20 / - 2 Partial capture
10-16 12:57 80m - / - US5AA -16 / - 2 ✓ Closing fragment
10-01 16:33 80m +11 / -12 PA4CC 0 / -16 4 ✓ Full exchange observed
10-01 16:30 80m +1 / - ON6AA - / - 5 Partial capture
10-01 16:22 80m -5 / - ON6AA - / - 4 Partial capture
08-24 10:04 20m +6 / - HA0AA - / -13 3 ✓ Closing fragment
08-24 09:58 20m +5 / - TI5RR -17 / -18 11 ✓ Closing observed
08-21 14:59 40m - / +1 RK3AW -12 / - 2 Partial capture
08-21 14:57 40m 0 / -7 HA3KHB -14 / -21 5 ✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
061845 +13 1384  UX4AA OM2IB RR73
061900 -10 1586  G3RWF UX4AA R-16 (x2)
062000  -3 1383  OM2IB UX4AA 73
062015  -4 1385  UX4AA F5MXH JN07
062030 -10 1385  F5MXH UX4AA -19
062045  -7 1385  UX4AA F5MXH JN07 (x2)
062130  -5 1384  F5MXH UX4AA RR73
062145 -11 1385  UX4AA F5MXH 73
062145  -4 1651  UX4AA F4FSY -14 (x3)
062315 -14  955  UX4AA SQ2BXI JO94 (x2)
20m 
UTC    dB Audio  Message
095830  -3  908  TI5RR UX4AA KO70 (x9)
100345 -17  908  UX4AA TI5RR RR73
100400 +11  908  TI5RR UX4AA 73
100430  +5 1518  HA0AA UX4AA KO70 (x3)
40m 
UTC    dB Audio  Message
145745  +2  958  HA3KHB UX4AA KO70
145800 -11  958  UX4AA HA3KHB -07
145815  +1  957  HA3KHB UX4AA R-21
145830 -16  958  UX4AA HA3KHB RR73
145845  -3  958  HA3KHB UX4AA 73
145900 -13 1152  UX4AA RK3AW +01 (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

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