IU4PRI — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving IU4PRI, decoded by SO8OO in southeastern Poland. 441 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 20 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-06.
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 441 FT8 messages attributed to IU4PRI as the transmitting token by decoded message structure across 20 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (66%), followed by 40 m (24%) and 80 m (10%). Most decodes (65%) fell within the six-hour window 03:00-09:00 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: 2026-09-06 06:58 UTC
Observed FT8 message patterns
- Attributed sample
- 441 messages
- Active dates
- 20 UTC dates
- Estimated median S/N
- -8 dB
- Estimated 10th-90th percentile
- -17 to +5 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 60, moderate (-15 to -9 dB) 146, strong (≥ -8 dB) 235.
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 IU4PRI 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 IU4PRI
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
- JN62 · 209 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,067 km (approx.)
- Last such locator decoded
- 2026-09-06 06:56 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 | IU4PRI S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-06 06:56 | 40m | -15 / - | KS4OT | - / -26 | 3 | Partial capture |
| 09-06 06:53 | 40m | - / -2 | 4O7CC | -8 / - | 2 | ✓ Closing fragment |
| 09-04 18:42 | 40m | -2 / -5 | UR4LG | -8 / -12 | 5 | ✓ Full exchange observed |
| 09-04 18:40 | 40m | -3 / -5 | PA8DC | +1 / -14 | 7 | ✓ Full exchange observed |
| 09-04 18:37 | 40m | -4 / +3 | DL1EDR | +5 / - | 4 | ✓ Closing observed |
| 08-28 06:19 | 20m | -3 / - | ZL1BQD | - / - | 3 | Partial capture |
| 08-28 06:18 | 20m | - / -12 | TA3F | -14 / - | 3 | Partial capture |
| 08-28 06:15 | 20m | -5 / - | TA3F | - / +2 | 3 | Partial capture |
| 08-28 06:10 | 20m | - / - | RK4CH | -13 / - | 3 | Partial capture |
| 08-28 06:06 | 20m | - / - | R3KCW | 0 / - | 2 | Partial capture |
| 08-26 06:02 | 20m | - / +8 | G7IGN | +8 / - | 3 | ✓ Closing fragment |
| 08-26 06:00 | 20m | - / -19 | F1ODM | +13 / - | 6 | Partial capture |
| 08-21 18:35 | 40m | - / -14 | UN7PPV | -16 / - | 4 | Partial capture |
| 08-21 18:33 | 40m | -6 / -8 | PA3AGN | -7 / +2 | 5 | ✓ Full exchange observed |
| 08-21 18:31 | 40m | -5 / - | IW0CGT | -9 / - | 4 | Partial capture |
| 08-21 18:27 | 40m | - / - | IW0CGT | -8 / - | 3 | Partial capture |
| 08-21 18:24 | 40m | -9 / -5 | HA3FIC | 0 / - | 10 | ✓ Full exchange observed |
| 08-21 18:20 | 40m | -7 / -9 | DL3JHK | -6 / -8 | 5 | ✓ Full exchange observed |
| 08-21 18:16 | 40m | -12 / -6 | DL1IP | +2 / - | 6 | ✓ Full exchange observed |
| 08-21 17:17 | 40m | -11 / - | PD1HBL | -13 / -12 | 10 | Partial capture |
| 08-21 17:13 | 40m | -11 / -15 | PA1PXL | -4 / - | 4 | ✓ Closing observed |
| 08-21 05:27 | 20m | +6 / - | ZL4HZ | - / - | 6 | Partial capture |
| 08-21 05:25 | 20m | +6 / -15 | OD5ZZ | -8 / - | 6 | Partial capture |
| 08-21 05:18 | 20m | +7 / - | KB3DQI | - / -18 | 13 | Partial capture |
| 08-21 05:16 | 20m | -6 / - | TJ1GD | - / - | 2 | Partial capture |
| 08-20 14:25 | 20m | -4 / - | DL1R | +4 / -4 | 9 | Partial capture |
| 08-20 14:24 | 20m | +6 / -9 | PA1PXL | 0 / -2 | 2 | Partial capture |
| 08-20 14:22 | 20m | +4 / - | F4PCM | +16 / +4 | 4 | ✓ Full exchange observed |
| 08-19 06:23 | 40m | -22 / - | OE1AVO | -16 / - | 2 | Partial capture |
| 08-17 19:08 | 20m | -6 / - | N2BJ | - / -2 | 3 | ✓ Closing fragment |
| 08-17 19:02 | 20m | -20 / +9 | GM4CXM | 0 / - | 5 | ✓ Full exchange observed |
| 08-17 18:57 | 20m | - / +6 | SV1EAG | -15 / - | 2 | ✓ Closing fragment |
| 08-17 07:37 | 20m | -13 / - | PD9FLX | - / -5 | 3 | Partial capture |
| 08-17 07:34 | 20m | -9 / - | M7GDQ | - / -3 | 2 | Partial capture |
| 08-17 07:33 | 20m | -5 / -12 | DL1BGH | -12 / +8 | 4 | ✓ Full exchange observed |
| 08-17 07:33 | 20m | - / - | PD9FLX | -19 / - | 2 | Partial capture |
| 08-17 07:30 | 20m | -12 / - | DL2VLL | - / +1 | 3 | ✓ Closing fragment |
| 08-17 07:27 | 20m | -7 / +8 | SV1EKI | -8 / - | 3 | Partial capture |
| 08-17 07:26 | 20m | -11 / - | OK2QP | - / +9 | 2 | ✓ Closing fragment |
| 08-17 07:22 | 20m | -10 / -15 | RV6F | -9 / -2 | 5 | ✓ Full exchange observed |
| 08-16 06:57 | 20m | - / - | SP1ZMO | -10 / - | 4 | Partial capture |
| 08-16 06:36 | 20m | -16 / - | R2FBW | - / -7 | 5 | Partial capture |
| 08-16 06:33 | 20m | -17 / - | SQ9DK/P | - / +1 | 2 | Partial capture |
| 08-16 06:26 | 20m | -17 / -1 | RN6MA | -8 / 0 | 8 | ✓ Full exchange observed |
| 08-16 06:25 | 20m | -17 / - | ON1DGN | -18 / - | 2 | ✓ Closing observed |
| 08-13 19:38 | 20m | -12 / - | 2E1HAT | - / -1 | 6 | Partial capture |
| 08-09 16:01 | 20m | -20 / - | DK8HC | - / -13 | 2 | Partial capture |
| 08-09 15:56 | 20m | -19 / - | R1BED | - / -2 | 4 | ✓ Closing fragment |
| 08-07 19:19 | 20m | - / - | CT1BFP | -16 / - | 3 | Partial capture |
| 08-07 16:36 | 10m | - / - | F5SJC | -11 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 184145 +4 2514 IU4PRI PA8DC 73 184200 +1 2515 CQ IU4PRI JN62 184215 -7 2514 IU4PRI UR4LG KN89 184230 -1 2515 UR4LG IU4PRI -12 184245 -8 2514 IU4PRI UR4LG R-05 184300 -3 2515 UR4LG IU4PRI RR73 184315 -8 2514 IU4PRI UR4LG 73 184330 -4 2515 CQ IU4PRI JN62 (x3) 065300 -7 2272 IU4PRI 4O7CC -02 (x2) 065615 -16 2515 KS4OT IU4PRI JN62 (x3)
UTC dB Audio Message 061545 -6 3085 TA3F IU4PRI +02 (x2) 061645 -5 3085 CQ IU4PRI JN62 (x3) 061830 -18 3085 IU4PRI TA3F R-12 061900 -4 1861 ZL1BQD IU4PRI JN62 (x2) 062030 -12 3085 IU4PRI TA3F R-12 062100 +1 1861 ZL1BQD IU4PRI JN62 062130 -12 3085 IU4PRI TA3F R-12 063800 +5 2879 IU4PRI SP1ZMO JO73 162200 -13 1878 CQ IU4PRI JN62 162300 -12 1877 W3YNI IU4PRI R-10 163345 -3 802 IU4PRI G0MTK IO90
UTC dB Audio Message 105730 -17 1237 IU4PRI ON8PIE -02 (x2) 105900 -15 1235 IU4PRI M0BEW +02 (x2) 071745 -5 2944 CQ IU4PRI JN62 a1 163315 -21 1984 IU4PRI DK4RH JO31 (x2) 163615 -9 910 IU4PRI F5SJC JN05 (x3)
UTC dB Audio Message 032715 -13 2730 LU7PBO IU4PRI JN62 (x10) 033215 -12 2730 HA3GX IU4PRI JN62 (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.
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