RU4I — reception at SO8OO
Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.
FT8 activity
Receiver-side FT8 activity involving RU4I, decoded by SO8OO in southeastern Poland. 1,417 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 59 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-17.
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 1,417 FT8 messages attributed to RU4I as the transmitting token by decoded message structure across 59 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (30%), followed by 40 m (26%) and 160 m (19%). Most decodes (64%) fell within the six-hour window 14:00-20:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.
Overview
Bands
Last attributed message: 2026-10-17 19:21 UTC
Observed FT8 message patterns
- Attributed sample
- 1,417 messages
- Active dates
- 59 UTC dates
- Estimated median S/N
- -8 dB
- Estimated 10th-90th percentile
- -16.2 to +2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 188, moderate (-15 to -9 dB) 490, strong (≥ -8 dB) 739.
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 RU4I 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 RU4I
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
- LO43 · 260 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,903 km (approx.)
- Last such locator decoded
- 2026-10-17 19:21 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 | RU4I S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-17 19:20 | 160m | -17 / - | R6TJ | - / - | 2 | Partial capture |
| 10-17 19:18 | 160m | -18 / -11 | UA1A | -12 / - | 3 | ✓ Closing observed |
| 10-17 19:14 | 160m | -19 / - | 4J3DJ | - / +1 | 6 | Partial capture |
| 10-17 17:51 | 160m | -20 / - | RV3YN | - / - | 2 | Partial capture |
| 10-17 17:43 | 160m | -21 / - | RV3YN | - / - | 2 | Partial capture |
| 10-17 17:14 | 160m | -17 / - | UA9JCH | - / -18 | 4 | ✓ Closing fragment |
| 10-17 17:08 | 160m | -19 / - | R9CS/P | - / -15 | 3 | ✓ Closing fragment |
| 10-15 18:23 | 160m | - / - | 9A4ZM | -6 / - | 2 | Partial capture |
| 10-15 18:18 | 160m | -13 / - | RA4CFX | - / -2 | 2 | ✓ Closing fragment |
| 10-15 17:59 | 80m | -2 / - | RL6ZK | - / -10 | 2 | Partial capture |
| 10-15 17:57 | 80m | -6 / -8 | R6AR | +2 / -10 | 4 | ✓ Full exchange observed |
| 10-14 17:46 | 80m | - / -6 | R7KJM | -8 / - | 2 | Partial capture |
| 10-14 16:43 | 160m | -12 / - | R8AC | - / -15 | 2 | ✓ Closing fragment |
| 10-14 16:42 | 160m | -10 / - | R9CS/P | - / +5 | 2 | ✓ Closing fragment |
| 10-14 16:24 | 160m | -14 / - | R9CS/P | - / +5 | 13 | Partial capture |
| 10-11 04:00 | 40m | -13 / - | UA3ZAB | - / -8 | 2 | ✓ Closing fragment |
| 10-09 03:27 | 40m | -15 / - | R7OI | - / -6 | 5 | ✓ Closing fragment |
| 10-09 03:24 | 40m | -9 / - | HC5F | - / -15 | 3 | ✓ Closing fragment |
| 10-09 03:21 | 40m | -10 / - | HC5F | - / -15 | 2 | Partial capture |
| 10-09 03:18 | 40m | -5 / - | 4L1FL | - / -2 | 2 | ✓ Closing fragment |
| 10-09 03:17 | 40m | -2 / - | HA1BF | - / -9 | 2 | ✓ Closing fragment |
| 10-09 03:16 | 40m | -2 / - | II5GG | - / -10 | 2 | ✓ Closing fragment |
| 10-09 03:15 | 40m | -4 / -1 | SV5AZK | -14 / -10 | 4 | ✓ Full exchange observed |
| 10-09 03:14 | 40m | -11 / - | OS4K | - / -15 | 2 | ✓ Closing fragment |
| 10-09 03:12 | 40m | -9 / -11 | HK3X | -12 / -14 | 6 | ✓ Full exchange observed |
| 10-09 03:11 | 40m | -10 / - | UA4FLL | - / -22 | 2 | ✓ Closing fragment |
| 10-09 03:10 | 40m | -15 / - | R3KMI | - / -13 | 2 | ✓ Closing fragment |
| 10-08 17:26 | 160m | - / -8 | DK2CC | -3 / - | 2 | ✓ Closing fragment |
| 10-08 17:24 | 160m | -12 / +4 | UA4CKZ | -22 / - | 3 | ✓ Closing observed |
| 10-08 17:22 | 160m | -10 / -14 | S52D | +10 / -14 | 4 | ✓ Full exchange observed |
| 10-08 17:20 | 160m | -8 / - | SV1RK | -1 / - | 4 | ✓ Closing observed |
| 10-08 17:18 | 160m | -8 / - | YO7CFD | - / - | 2 | Partial capture |
| 10-08 17:12 | 160m | -12 / -9 | RA5AD | +2 / -1 | 4 | ✓ Full exchange observed |
| 10-08 17:09 | 160m | -12 / - | RA6FCU/P | - / -12 | 4 | ✓ Closing fragment |
| 10-08 13:56 | 40m | -12 / - | RA9YJU | - / -7 | 3 | ✓ Closing fragment |
| 10-08 13:52 | 40m | -11 / -5 | R80SAA | -6 / +4 | 5 | ✓ Full exchange observed |
| 10-08 13:51 | 40m | -9 / +3 | RK1K | -15 / -6 | 4 | ✓ Full exchange observed |
| 10-08 13:49 | 40m | -12 / - | UC1C | -11 / -14 | 3 | ✓ Closing observed |
| 10-07 18:18 | 80m | -11 / - | R1BLO/P | - / -12 | 8 | ✓ Closing fragment |
| 10-07 17:17 | 80m | -7 / - | R4CC | -4 / +6 | 2 | ✓ Closing observed |
| 10-07 16:59 | 80m | -7 / - | RA4UIV | - / +2 | 2 | ✓ Closing fragment |
| 10-07 16:58 | 80m | -6 / -19 | R4CC | -10 / +2 | 5 | Partial capture |
| 10-07 16:57 | 80m | - / - | DO8JB | -8 / - | 10 | Partial capture |
| 10-07 16:57 | 80m | -6 / 0 | R3TY | -16 / -4 | 4 | ✓ Full exchange observed |
| 10-07 16:54 | 80m | -16 / - | HF50HSP | - / -10 | 2 | Partial capture |
| 10-07 16:40 | 160m | - / -3 | UA3IDQ | -20 / - | 2 | ✓ Closing fragment |
| 10-07 16:13 | 160m | -22 / - | R8KAW/P | - / -14 | 2 | Partial capture |
| 10-07 16:10 | 160m | -19 / - | R9CS/P | 0 / +7 | 4 | ✓ Closing observed |
| 10-07 03:56 | 40m | -8 / - | DJ6OI/P | - / -14 | 2 | Partial capture |
| 10-07 03:55 | 40m | -12 / - | RA6HN | -15 / - | 2 | ✓ Closing observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 175130 -20 1198 RV3YN RU4I LO43 (x2) 190900 -10 1068 R1BNG/P RU4I -20 191400 -20 998 4J3DJ RU4I LO43 (x6) 191800 -18 998 UA1A RU4I LO43 191815 -11 2026 RU4I UA1A -11 (x2) 192030 -18 998 R6TJ RU4I LO43 192045 -15 2463 RU4I R2EA/P -15 192100 -16 999 R6TJ RU4I LO43
UTC dB Audio Message 182015 -10 1000 R1BLO/P RU4I -12 (x5) 034430 -19 1259 RA4FEA RU4I -03 173430 -16 2295 RU4I R5BM/M -04 174645 -10 679 RU4I R7KJM R-06 (x2) 175745 -4 607 R6AR RU4I -10 175800 -2 1582 RU4I R6AR R-08 175815 -7 607 R6AR RU4I RR73 175830 +7 1582 RU4I R6AR 73 175915 -3 606 RL6ZK RU4I -10 (x2)
UTC dB Audio Message 032300 -10 1090 UB3KGW RU4I -17 032430 -3 1091 HC5F RU4I RR73 (x3) 032745 -12 1091 R7OI RU4I LO43 032830 -6 1091 UA3VFL RU4I LO43 032945 -15 1091 R7OI RU4I LO43 (x4) 033145 -12 1091 YO5ODL RU4I LO43 035400 -22 1705 RA9YTI RU4I -06 040015 -13 1120 UA3ZAB RU4I R-08 (x2) 040300 -8 984 RU4I RA6ATZ RR73
UTC dB Audio Message 143845 -11 735 RZ1AS RU4I -05 144230 -12 735 LU2MET RU4I RR73 144330 -13 735 IX1CVF RU4I RR73 144430 -11 735 R4FCK RU4I -11 144545 -10 1007 RU4I IZ4JMA R+17 083145 -3 746 RU4I R6DWD -08 (x2) 070345 -18 2329 RU4I <...> +10 084100 +4 2944 RU4I R9DT R-16 (x2)
UTC dB Audio Message 143145 +18 683 RA2FU RU4I -20 (x2) 143245 +9 683 R4FDP RU4I -12 (x2) 143330 +12 355 RU4I R4FDP R-12 143345 +16 683 R4FDP RU4I RR73 143400 +8 355 RU4I R4FDP 73 143415 +14 683 BG5BNW RU4I -15 (x2) 143545 +23 683 MI0UFT RU4I -14 133415 +1 1007 UB0SMX/P RU4I LO43 (x5)
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.
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