IU4UWH — 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 IU4UWH, decoded by SO8OO in southeastern Poland. 813 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 34 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-10-23.
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 813 FT8 messages attributed to IU4UWH as the transmitting token by decoded message structure across 34 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (61%), followed by 60 m (21%) and 40 m (12%). Most decodes (90%) fell within the six-hour window 20:00-02:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.
Overview
Bands
Last attributed message: 2026-10-23 01:31 UTC
Observed FT8 message patterns
- Attributed sample
- 813 messages
- Active dates
- 34 UTC dates
- Estimated median S/N
- -15 dB
- Estimated 10th-90th percentile
- -23 to -7 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 376, moderate (-15 to -9 dB) 324, strong (≥ -8 dB) 113.
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 IU4UWH 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 IU4UWH
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
- JN54 · 602 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,013 km (approx.)
- Last such locator decoded
- 2026-10-23 01:31 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 | IU4UWH S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-23 00:03 | 40m | - / -21 | TA2ED | -14 / - | 2 | Partial capture |
| 10-22 23:48 | 40m | - / -20 | TA2ED | -16 / - | 2 | Partial capture |
| 10-22 13:17 | 40m | - / -5 | SP6AMI | -4 / - | 2 | ✓ Closing fragment |
| 10-22 13:16 | 40m | -19 / - | F4EEL/P | - / -15 | 2 | ✓ Closing fragment |
| 10-22 13:13 | 40m | -20 / -8 | OK8UQ | -6 / - | 3 | ✓ Closing observed |
| 10-22 13:13 | 40m | -21 / -4 | F1PBZ | -4 / -1 | 3 | ✓ Full exchange observed |
| 10-20 21:51 | 60m | -9 / - | JY4CI | - / -6 | 5 | ✓ Closing fragment |
| 10-20 21:49 | 60m | -13 / -5 | DH4PAP | -5 / -4 | 5 | ✓ Full exchange observed |
| 10-20 21:46 | 60m | -13 / - | M0TBQ | -11 / -14 | 2 | ✓ Closing observed |
| 10-20 21:17 | 60m | -10 / -2 | ON1BH | -16 / -6 | 4 | ✓ Full exchange observed |
| 10-20 21:13 | 60m | -14 / +2 | DG7ZQ | -13 / -8 | 5 | ✓ Full exchange observed |
| 10-20 21:06 | 60m | -11 / -4 | OT4R | -3 / -5 | 5 | ✓ Full exchange observed |
| 10-20 21:06 | 60m | -15 / -2 | DK1FS | 0 / - | 4 | ✓ Closing observed |
| 10-20 20:58 | 60m | -20 / - | SP3JHZ | - / -15 | 2 | ✓ Closing fragment |
| 10-20 20:52 | 60m | -14 / -1 | SP6IYR | -5 / -6 | 4 | ✓ Full exchange observed |
| 10-20 20:46 | 60m | -16 / - | DB5HA | -22 / -16 | 3 | ✓ Closing observed |
| 10-20 20:45 | 60m | -16 / -15 | F1IQH | -11 / -4 | 5 | ✓ Full exchange observed |
| 10-20 20:44 | 60m | -19 / - | EA7KMY | - / -20 | 2 | ✓ Closing fragment |
| 10-18 22:34 | 80m | - / -7 | IU5VMC | -18 / - | 2 | ✓ Closing fragment |
| 10-18 22:24 | 80m | -12 / - | EA9ADC | - / - | 2 | Partial capture |
| 10-18 22:19 | 80m | -14 / - | DO3RST | +7 / -14 | 4 | Partial capture |
| 10-18 22:19 | 80m | -10 / -11 | DH9DR | +10 / -8 | 4 | ✓ Full exchange observed |
| 10-18 22:11 | 80m | -6 / +1 | DL4KSD | -12 / -18 | 4 | ✓ Full exchange observed |
| 10-18 22:08 | 80m | -13 / -7 | ON1BH | +3 / - | 3 | ✓ Closing observed |
| 10-18 22:00 | 80m | -10 / -13 | CT2GQA | -20 / -15 | 5 | ✓ Full exchange observed |
| 10-18 22:00 | 80m | -6 / -6 | DK9PH | +7 / +1 | 6 | ✓ Full exchange observed |
| 10-18 21:54 | 80m | -15 / -9 | IU7KEG | -12 / -5 | 3 | ✓ Full exchange observed |
| 10-18 21:50 | 80m | -17 / -10 | ON4MAP | -12 / -14 | 4 | ✓ Full exchange observed |
| 10-18 21:44 | 80m | -12 / - | R4FDD | -20 / -19 | 6 | ✓ Closing observed |
| 10-18 21:25 | 60m | -6 / - | GI4NKB | - / - | 4 | Partial capture |
| 10-18 20:37 | 40m | - / - | EA2AGW | -16 / - | 2 | Partial capture |
| 10-17 23:39 | 60m | -10 / - | SP1ZMO | - / +1 | 2 | ✓ Closing fragment |
| 10-17 22:45 | 80m | -2 / - | SV1DZB | -14 / -6 | 4 | Partial capture |
| 10-17 22:40 | 80m | - / - | DO2RG | +8 / - | 2 | ✓ Closing fragment |
| 10-17 22:38 | 80m | - / -17 | DA6OOM | -4 / - | 3 | ✓ Closing fragment |
| 10-17 22:34 | 80m | - / - | DA6OOM | -6 / - | 3 | Partial capture |
| 10-17 22:30 | 80m | -12 / - | YO3FWL | +4 / -6 | 4 | ✓ Closing observed |
| 10-17 22:27 | 80m | -5 / - | F1IQH | - / -9 | 2 | ✓ Closing fragment |
| 10-17 22:26 | 80m | -8 / - | EA3FR | - / -15 | 2 | ✓ Closing fragment |
| 10-17 22:24 | 80m | +4 / -5 | DO2HC | +6 / -13 | 5 | ✓ Full exchange observed |
| 10-17 22:21 | 80m | -9 / -7 | IU8GUK | -8 / -6 | 3 | ✓ Full exchange observed |
| 10-17 22:21 | 80m | -6 / -12 | ON4MAP | -3 / -22 | 7 | ✓ Full exchange observed |
| 10-17 22:17 | 80m | - / 0 | CT4KQ | -24 / - | 6 | Partial capture |
| 10-17 22:15 | 80m | - / -13 | DF5AH | -5 / - | 4 | ✓ Closing fragment |
| 10-17 22:14 | 80m | -13 / -1 | F5OYA/P | -18 / -7 | 5 | ✓ Full exchange observed |
| 10-17 19:18 | 40m | -20 / - | OZ9MSD | - / -15 | 2 | ✓ Closing fragment |
| 10-17 19:17 | 40m | -13 / - | G0HZG | - / -14 | 2 | ✓ Closing fragment |
| 10-17 19:15 | 40m | -10 / - | R2PX | - / -11 | 2 | ✓ Closing fragment |
| 10-17 19:09 | 40m | -7 / -2 | OE6TNO | -2 / - | 2 | ✓ Closing observed |
| 10-17 19:06 | 40m | - / - | MW9XET | -15 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 214600 -13 1784 M0TBQ IU4UWH R-14 214615 -11 488 IU4UWH M0TBQ RR73 214700 -13 1784 CQ IU4UWH JN54 214915 -11 1006 IU4UWH DH4PAP JO30 214930 -13 1784 DH4PAP IU4UWH -04 214945 -2 1006 IU4UWH DH4PAP R-05 215000 -13 1784 DH4PAP IU4UWH RR73 215015 -2 1006 IU4UWH DH4PAP 73 215030 -10 1783 CQ IU4UWH JN54 215100 -7 1783 JY4CI IU4UWH JN54 (x5) 013115 -6 1557 CQ IU4UWH JN54
UTC dB Audio Message 131330 -21 1412 F1PBZ IU4UWH R-01 131345 -5 1062 IU4UWH OK8UQ -08 131345 -4 2790 IU4UWH F1PBZ RR73 131500 -17 1412 DK1TS IU4UWH 73 131545 -7 1412 IU4UWH OK8UQ RR73 131600 -20 1412 OK8UQ IU4UWH 73 131630 -19 1412 F4EEL/P IU4UWH -15 (x2) 131730 -20 1413 CQ IU4UWH JN54 131745 -2 1412 IU4UWH SP6AMI -05 (x2) 234800 -16 1177 IU4UWH TA2ED -20 (x4)
UTC dB Audio Message 221915 -8 2144 DH9DR IU4UWH -08 221930 +7 2582 IU4UWH DO3RST JO31 221930 +10 2271 IU4UWH DH9DR R-11 221945 -12 2144 DH9DR IU4UWH RR73 222000 +11 2271 IU4UWH DH9DR 73 222045 -14 2144 DO3RST IU4UWH -14 (x3) 222215 -11 2144 CQ IU4UWH JN54 (x3) 222445 -11 2144 EA9ADC IU4UWH JN54 (x2) 223400 -21 1274 IU4UWH IU5VMC -07 (x2)
UTC dB Audio Message 210130 -21 1850 II5GG IU4UWH JN54 (x4) 215900 +3 1156 IU4UWH OM2WW -20 (x2) 215945 -21 1258 OM2WW IU4UWH 73 220015 -21 1258 CQ IU4UWH JN54 (x4)
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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