UB4YCZ — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving UB4YCZ, decoded by SO8OO in southeastern Poland. 99 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-07-29 and 2026-08-28.
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 99 FT8 messages attributed to UB4YCZ as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (98%), followed by 40 m (2%). Several six-hour UTC windows tied for the largest share (51%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (79%); the estimated median was +2 dB.
Overview
Bands
Last attributed message: 2026-08-28 11:54 UTC
Observed FT8 message patterns
- Attributed sample
- 99 messages
- Active dates
- 4 UTC dates
- Estimated median S/N
- +2 dB
- Estimated 10th-90th percentile
- -15 to +9 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 9, moderate (-15 to -9 dB) 12, strong (≥ -8 dB) 78.
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 UB4YCZ 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 UB4YCZ
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
- LO36 · 36 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,817 km (approx.)
- Last such locator decoded
- 2026-08-28 11:47 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 | UB4YCZ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-28 11:55 | 20m | - / - | G8IXM | -12 / - | 2 | Partial capture |
| 08-28 11:53 | 20m | -2 / +1 | F5MXH | -5 / -3 | 6 | ✓ Full exchange observed |
| 08-28 11:51 | 20m | +3 / - | N1UL | - / -15 | 3 | Partial capture |
| 08-28 11:50 | 20m | - / - | G8IXM | -9 / - | 3 | Partial capture |
| 08-28 11:50 | 20m | +3 / - | RA0SCZ | -9 / -22 | 3 | ✓ Closing observed |
| 08-28 11:50 | 20m | - / - | F5MXH | -7 / - | 2 | Partial capture |
| 08-28 11:48 | 20m | +2 / - | RA6AVP | - / -7 | 2 | ✓ Closing fragment |
| 08-28 11:47 | 20m | -1 / +2 | IK4LZH | +19 / +1 | 8 | ✓ Full exchange observed |
| 08-24 18:13 | 40m | - / -11 | R6FFB | +2 / - | 5 | ✓ Closing fragment |
| 08-24 18:09 | 40m | -10 / -3 | R1BDX | -10 / -8 | 3 | ✓ Full exchange observed |
| 08-24 18:08 | 40m | - / - | UA3DPM | -4 / - | 7 | ✓ Closing fragment |
| 08-24 18:07 | 40m | - / - | R3DHP | -6 / - | 4 | Partial capture |
| 08-24 18:07 | 40m | - / -5 | RU3DNN | -3 / - | 8 | ✓ Closing fragment |
| 08-24 18:02 | 40m | - / +10 | UA3SCU | -6 / - | 4 | Partial capture |
| 08-24 18:01 | 40m | - / -7 | R3LAF | -6 / - | 6 | ✓ Closing fragment |
| 08-24 18:01 | 40m | - / -9 | RK4FD | -4 / - | 12 | Partial capture |
| 08-24 17:58 | 40m | - / - | R3DHP | -7 / - | 2 | Partial capture |
| 08-24 17:56 | 40m | - / - | R6FFB | +5 / - | 3 | Partial capture |
| 08-24 17:54 | 40m | - / - | RK4F | -10 / - | 2 | Partial capture |
| 08-24 09:30 | 20m | +9 / -10 | EB7FSB | -4 / -10 | 7 | ✓ Full exchange observed |
| 08-24 09:30 | 20m | +5 / -9 | I4WQH | -11 / - | 4 | ✓ Closing observed |
| 08-24 09:27 | 20m | +12 / -3 | RZ3ARO/6 | -14 / -3 | 7 | ✓ Full exchange observed |
| 08-24 09:26 | 20m | +10 / +2 | EW8CW | -20 / +3 | 4 | ✓ Full exchange observed |
| 08-24 09:21 | 20m | +8 / - | YV5JLO | - / -15 | 7 | Partial capture |
| 08-24 09:18 | 20m | +3 / -5 | CU3HN | -7 / -2 | 4 | ✓ Full exchange observed |
| 08-24 09:17 | 20m | +1 / - | ON1JP | - / -8 | 2 | ✓ Closing fragment |
| 08-24 09:15 | 20m | +3 / - | SP6AXW | - / -6 | 3 | ✓ Closing fragment |
| 08-24 09:13 | 20m | +5 / - | OS4K | - / -12 | 2 | ✓ Closing fragment |
| 08-24 09:11 | 20m | +3 / - | PD1HBL | - / -16 | 3 | ✓ Closing fragment |
| 08-24 09:11 | 20m | +4 / -11 | EA3FZN | -4 / -6 | 11 | ✓ Full exchange observed |
| 08-09 07:33 | 20m | - / -15 | R2PA | -10 / - | 2 | ✓ Closing fragment |
| 08-09 07:26 | 20m | - / -18 | YO4NF | -12 / - | 3 | Partial capture |
| 07-30 18:04 | 20m | - / - | M0YGH | -12 / - | 4 | Partial capture |
| 07-30 18:03 | 20m | - / - | IW1ACL | -10 / - | 2 | Partial capture |
| 07-30 18:02 | 20m | - / - | EA5ET | -5 / - | 3 | Partial capture |
| 07-30 18:01 | 20m | - / -11 | RN6MA | -13 / - | 3 | Partial capture |
| 07-30 17:59 | 20m | -19 / - | OK1AYM | - / -8 | 3 | ✓ Closing fragment |
| 07-30 17:56 | 20m | +8 / - | R6LNH | - / +4 | 2 | ✓ Closing fragment |
| 07-30 17:56 | 20m | - / - | 9A4ZM | -16 / - | 2 | Partial capture |
| 07-30 17:55 | 20m | 0 / - | RC6OU | - / -21 | 2 | ✓ Closing fragment |
| 07-30 17:53 | 20m | - / - | ON4ASV | -5 / - | 3 | Partial capture |
| 07-30 17:51 | 20m | +6 / - | OZ5AGJ | - / -15 | 2 | ✓ Closing fragment |
| 07-30 17:51 | 20m | - / -15 | TA2ED | -12 / - | 2 | Partial capture |
| 07-30 17:49 | 20m | +6 / - | BG7BMG | - / -23 | 2 | Partial capture |
| 07-30 17:48 | 20m | - / - | DK7UY | -17 / - | 2 | Partial capture |
| 07-30 17:47 | 20m | -14 / - | ZS1WC | - / -12 | 2 | ✓ Closing fragment |
| 07-30 17:43 | 20m | -15 / - | C91RU | - / - | 5 | ✓ Closing fragment |
| 07-30 17:34 | 20m | -5 / - | PA7CV | - / -12 | 2 | ✓ Closing fragment |
| 07-30 17:33 | 20m | +1 / -10 | I1RJP | 0 / -4 | 8 | ✓ Full exchange observed |
| 07-30 17:31 | 20m | -6 / - | R2FBW | - / -6 | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 115100 +0 1821 N1UL UB4YCZ -15 115115 -7 862 UB4YCZ G8IXM JO02 115130 +1 1821 N1UL UB4YCZ -22 115145 -11 862 UB4YCZ G8IXM JO02 115200 +7 1821 N1UL UB4YCZ -22 115230 +3 1821 RA0SCZ UB4YCZ -22 (x2) 115315 -4 1821 UB4YCZ F5MXH JN07 (x2) 115400 -5 1821 F5MXH UB4YCZ -03 115415 -4 1821 UB4YCZ F5MXH R+01 115430 +2 1821 F5MXH UB4YCZ RR73 115445 -2 1822 UB4YCZ F5MXH 73 115515 -12 861 UB4YCZ G8IXM JO02 (x2)
UTC dB Audio Message 180945 -9 2114 R1BDX UB4YCZ RR73 181000 -5 2448 UB4YCZ UA3DPM KO95 181000 -6 2114 UB4YCZ RU3DNN KO96 (x3) 181100 -13 1676 UB4YCZ RK4F LO23 181100 -8 1104 UB4YCZ RA5AK -02 181200 -8 2448 UB4YCZ UA3DPM R+14 (x2) 181300 +4 2115 UB4YCZ R6FFB LN14 (x5) 181500 -3 840 UB4YCZ R3PJ KO84
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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