UR3CTB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Ukraine Most frequent locator attributed to this token: KN59

Receiver-side FT8 activity involving UR3CTB, decoded by SO8OO in southeastern Poland. 163 FT8 messages attributed to this token as transmitter, on 10m, across 8 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-07-09.

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 163 FT8 messages attributed to UR3CTB as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (100%). Most decodes (56%) fell within the six-hour window 06:00-12:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (75%); the estimated median was -2 dB.

Overview

163
Messages attributed
8
UTC dates decoded
18
Active 15-min windows
-2 dB
Estimated median S/N

Bands

10m · 163
First attributed message: 2026-06-09
Last attributed message: 2026-07-09 06:06 UTC

Observed FT8 message patterns

Attributed sample
163 messages
Active dates
8 UTC dates
Estimated median S/N
-2 dB
Estimated 10th-90th percentile
-13 to +13 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 35, strong (≥ -8 dB) 123.

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 UR3CTB 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 UR3CTB

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
KN59 · 101 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
663 km (approx.)
Last such locator decoded
2026-07-09 06:06 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 UTCBandUR3CTB S/NCounterpartCounterpart S/NMsgsCapture
09-02 07:47 10m - / 0 IW8PQ -21 / - 3 ✓ Closing fragment
09-02 07:34 10m - / -18 UR4QWW -18 / - 3 ✓ Closing fragment
08-27 09:45 10m - / -10 F4FSY -12 / - 2 Partial capture
08-18 08:04 10m - / - F1MXE -15 / - 4 Partial capture
08-18 07:35 10m - / - PA3AGN -12 / - 2 Partial capture
08-02 06:11 10m - / -22 UR4LRG -6 / - 2 ✓ Closing fragment
07-30 07:56 10m - / - SV1EKI -11 / - 3 Partial capture
07-30 07:29 10m - / -4 RN6MA -2 / - 2 Partial capture
07-24 13:23 10m - / - DO7DE -8 / - 3 Partial capture
07-17 05:49 10m - / -17 RN6MA -5 / - 2 Partial capture
07-09 06:01 10m - / - RN6MA -20 / - 2 Partial capture
07-09 05:46 10m - / - RN6MA -23 / - 2 Partial capture
07-05 08:46 10m - / - F5ADE -13 / - 4 Partial capture
07-05 08:46 10m - / - DO1FZL -11 / - 2 Partial capture
07-02 08:02 10m - / -3 RW6HP -16 / - 4 Partial capture
06-30 12:36 10m - / -12 TM2WWA +10 / - 5 Partial capture
06-30 12:32 10m - / -17 F4FSY 0 / - 3 Partial capture
06-30 11:12 10m -4 / - 5W1SA - / - 4 Partial capture
06-30 11:11 10m +7 / - DV6YDG - / +4 3 ✓ Closing fragment
06-28 21:43 10m - / - SV2CLJ -6 / - 3 Partial capture
06-28 21:41 10m -13 / - ZL4KX - / - 7 Partial capture
06-28 21:33 10m -13 / - <...> - / - 4 Partial capture
06-28 21:27 10m -6 / - ZL4TT - / -18 3 ✓ Closing fragment
06-27 19:59 10m - / - DL3MIB +4 / - 6 Partial capture
06-25 21:00 10m -11 / -15 CE2SV -2 / - 3 ✓ Closing observed
06-25 20:56 10m -10 / -1 IU4QRO +1 / +5 10 ✓ Full exchange observed
06-25 20:53 10m -3 / - SP5OKO - / -6 3 ✓ Closing fragment
06-25 20:51 10m -6 / - OK1FWG - / +2 2 ✓ Closing fragment
06-25 20:48 10m -3 / - DO6BLK - / -5 3 ✓ Closing fragment
06-25 20:45 10m -7 / - S59MA - / +9 3 ✓ Closing fragment
06-25 20:43 10m -3 / -5 DK7UY -10 / +3 5 ✓ Full exchange observed
06-25 20:41 10m -1 / - LZ2VQ - / -5 3 ✓ Closing fragment
06-25 20:39 10m +1 / - DA6JT - / -10 3 ✓ Closing fragment
06-25 20:36 10m +4 / -15 IQ8PC -14 / -19 7 ✓ Full exchange observed
06-25 20:30 10m 0 / - DO9BAU - / -8 2 Partial capture
06-25 20:29 10m +2 / - US5WFL - / +4 2 ✓ Closing fragment
06-25 20:26 10m 0 / - UR5WAI - / +5 3 ✓ Closing fragment
06-25 19:52 10m -6 / - ER3CT - / -25 4 Partial capture

Recent FT8 messages decoded at SO8OO

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

10m 
UTC    dB Audio  Message
061130  -6  405  UR3CTB UR4LRG RR73
073545 -12 1193  UR3CTB PA3AGN JO22 (x2)
080400  -5 2765  UR3CTB F1MXE JN05 (x4)
094515 -13 1708  UR3CTB F4FSY -10 (x2)
073430 -15 1894  UR3CTB UR4QWW KN77 (x3)
074730 -18 1470  UR3CTB IW8PQ JM78 (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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