UR5SI — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Ukraine Most frequent locator attributed to this token: KN28

Receiver-side FT8 activity involving UR5SI, decoded by SO8OO in southeastern Poland. 115 FT8 messages attributed to this token as transmitter, on 80m, across 4 UTC dates in the available aggregate history. Observed between 2026-09-28 and 2026-10-04.

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 115 FT8 messages attributed to UR5SI as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%). Several six-hour UTC windows tied for the largest share (90%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (100%); the estimated median was +16 dB.

Overview

115
Messages attributed
4
UTC dates decoded
11
Active 15-min windows
+16 dB
Estimated median S/N

Bands

80m · 115
First attributed message: 2026-09-28
Last attributed message: 2026-10-04 19:10 UTC

Observed FT8 message patterns

Attributed sample
115 messages
Active dates
4 UTC dates
Estimated median S/N
+16 dB
Estimated 10th-90th percentile
+11 to +21 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 115.

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 UR5SI 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 UR5SI

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
KN28 · 53 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
283 km (approx.)
Last such locator decoded
2026-10-04 19:10 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 UTCBandUR5SI S/NCounterpartCounterpart S/NMsgsCapture
10-04 19:10 80m - / - R2AL +5 / - 3 Partial capture
10-04 19:08 80m +18 / -7 DO5AX -24 / -21 5 Partial capture
10-04 19:06 80m +20 / - PA0MUS -19 / -4 3 Partial capture
10-04 19:02 80m +17 / +9 DO5PY -4 / -6 7 ✓ Full exchange observed
10-04 19:00 80m +14 / - IN3IZQ -13 / -12 4 ✓ Full exchange observed
10-04 18:54 80m +14 / -5 F4MVU -16 / -17 4 ✓ Full exchange observed
10-04 18:50 80m +16 / +4 F5LVR +4 / -7 10 ✓ Full exchange observed
10-04 18:47 80m +15 / -3 DL4RE -10 / -14 5 Partial capture
10-04 18:46 80m +18 / - DG2EBG +2 / -6 6 ✓ Closing observed
10-04 18:41 80m - / - EB1LA -6 / - 4 Partial capture
10-02 18:38 80m +17 / -1 DL9KM -10 / -13 11 ✓ Full exchange observed
10-02 18:38 80m - / - UA4FKT +2 / - 2 Partial capture
10-02 18:37 80m - / -10 R1TAX +2 / - 2 Partial capture
10-02 18:35 80m +17 / - DK0FL - / +4 3 Partial capture
10-02 18:30 80m - / - DO2HC 0 / - 2 Partial capture
10-02 18:28 80m +10 / -2 HF5A +8 / +1 5 ✓ Full exchange observed
10-01 17:26 80m +19 / - SP5DFK/QRP -2 / +1 3 ✓ Full exchange observed
10-01 17:25 80m +22 / +2 UT6HN -2 / +7 8 ✓ Full exchange observed
10-01 17:22 80m +12 / - UN0GY - / -15 4 ✓ Closing fragment
10-01 17:19 80m - / - R4FDK -5 / - 3 Partial capture
10-01 17:17 80m +13 / - E70SZ +4 / - 5 ✓ Full exchange observed
10-01 05:08 80m - / - DO5AX -23 / - 3 Partial capture
10-01 05:08 80m - / -14 MI0OBC -2 / - 2 Partial capture
10-01 05:07 80m - / - DL9KM -4 / - 6 Partial capture
10-01 05:06 80m +24 / +4 DO1ID +5 / -3 6 ✓ Full exchange observed
10-01 05:06 80m - / - F6FTB -2 / - 4 Partial capture
10-01 05:06 80m +20 / -5 DO1FZL -8 / -8 6 ✓ Full exchange observed
09-28 18:26 80m +16 / -13 DO1TEM -16 / -20 4 ✓ Full exchange observed
09-28 18:25 80m +14 / +4 DL7ACA +3 / -6 5 ✓ Full exchange observed
09-28 18:21 80m - / - UA4FKT +9 / - 3 Partial capture
09-28 18:20 80m +18 / -8 DO8JB +3 / -6 5 ✓ Full exchange observed
09-28 18:20 80m - / - R3ICU -4 / - 3 Partial capture
09-28 18:13 80m - / - R3ICU -16 / - 2 Partial capture
09-28 18:12 80m +16 / -2 DO1VR -8 / -8 5 ✓ Full exchange observed
09-28 18:10 80m +17 / -13 EA3KI -12 / -16 10 ✓ Full exchange observed
09-28 18:09 80m +18 / +4 UR5VLC 0 / - 2 ✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
190530 +10  879  CQ UR5SI KN28 (x3)
190645 -19 1951  UR5SI PA0MUS JO22
190700 +21  879  PA0MUS UR5SI -04 (x2)
190830 +19  879  DO5AX UR5SI -21 (x2)
190915 -24 2231  UR5SI DO5AX R-07
190930 +17  879  DO5AX UR5SI RRR (x2)
191030 +16  879  CQ UR5SI KN28
191045  +2  933  UR5SI R2AL KO85 (x3)

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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