IU5VLU — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving IU5VLU, decoded by SO8OO in southeastern Poland. 435 FT8 messages attributed to this token as transmitter, on 60m, 40m, 20m, 10m, across 43 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-13.
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 435 FT8 messages attributed to IU5VLU as the transmitting token by decoded message structure across 43 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (61%), followed by 40 m (25%) and 10 m (13%). Most decodes (63%) 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 -10.1 dB.
Overview
Bands
Last attributed message: 2026-09-13 18:45 UTC
Observed FT8 message patterns
- Attributed sample
- 435 messages
- Active dates
- 43 UTC dates
- Estimated median S/N
- -10.1 dB
- Estimated 10th-90th percentile
- -20 to 0 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 124, moderate (-15 to -9 dB) 132, strong (≥ -8 dB) 179.
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 IU5VLU 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 IU5VLU
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
- JN52 · 228 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,170 km (approx.)
- Last such locator decoded
- 2026-09-13 18:36 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 | IU5VLU S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-13 18:45 | 40m | +5 / - | MW6YPO | - / -13 | 2 | ✓ Closing fragment |
| 09-13 18:41 | 40m | +6 / - | EX7CQ | +4 / -25 | 4 | ✓ Closing observed |
| 09-13 18:36 | 40m | -10 / - | EX7CQ | - / - | 2 | Partial capture |
| 09-12 18:40 | 40m | 0 / -7 | ES8JX | -12 / -6 | 5 | ✓ Full exchange observed |
| 09-12 18:21 | 40m | +6 / - | F6FHZ | -9 / -11 | 5 | ✓ Closing observed |
| 09-12 18:19 | 40m | +5 / +5 | DH0GBC | +6 / 0 | 5 | ✓ Full exchange observed |
| 09-12 18:19 | 40m | +8 / - | PA3GUW | - / -17 | 2 | ✓ Closing fragment |
| 09-12 16:56 | 40m | +3 / - | IK1MJK/P | -11 / - | 2 | ✓ Closing observed |
| 09-12 13:11 | 40m | -20 / - | IU5VLR | - / - | 5 | Partial capture |
| 09-07 18:55 | 60m | -8 / +4 | G4JYU | -6 / -2 | 5 | ✓ Full exchange observed |
| 09-03 11:15 | 40m | - / - | IZ4AIF | -12 / - | 4 | ✓ Closing fragment |
| 09-01 17:55 | 40m | -4 / - | IU5KWL | - / -6 | 2 | ✓ Closing fragment |
| 09-01 17:52 | 40m | -5 / -10 | OH9FTW | -6 / -10 | 5 | ✓ Full exchange observed |
| 08-31 06:07 | 20m | -18 / - | OA1F | - / - | 5 | Partial capture |
| 08-23 15:33 | 20m | -11 / - | EA6AQG | - / - | 8 | Partial capture |
| 08-23 15:26 | 20m | - / - | LZ1BT | -2 / - | 6 | Partial capture |
| 08-23 15:24 | 20m | - / -1 | F1ODM | +2 / - | 2 | ✓ Closing fragment |
| 08-23 13:03 | 20m | +13 / - | YU7DES | - / -4 | 2 | ✓ Closing fragment |
| 08-23 12:57 | 20m | -2 / - | M0SPW | - / -16 | 2 | ✓ Closing fragment |
| 08-23 12:47 | 20m | - / - | PD3JW | -8 / - | 2 | Partial capture |
| 08-23 12:46 | 20m | - / - | DL1R | +4 / - | 5 | Partial capture |
| 08-23 12:46 | 20m | +4 / -14 | F4AWT | -12 / -8 | 3 | ✓ Full exchange observed |
| 08-23 12:26 | 20m | 0 / +4 | IW9FRA | -11 / -3 | 2 | Partial capture |
| 08-22 16:16 | 20m | +2 / -8 | 7K1CPT | -6 / -5 | 4 | ✓ Full exchange observed |
| 08-22 16:09 | 20m | -6 / - | G6MTI | -8 / -13 | 5 | ✓ Full exchange observed |
| 08-22 15:49 | 20m | - / -6 | F4EWK | -18 / - | 2 | ✓ Closing fragment |
| 08-22 14:38 | 20m | -16 / - | 4S6ARW | - / - | 4 | Partial capture |
| 08-22 14:35 | 20m | -19 / - | EA7Y | -20 / -8 | 3 | Partial capture |
| 08-22 14:30 | 20m | - / -22 | PD0WL | -21 / - | 5 | Partial capture |
| 08-22 14:29 | 20m | - / -10 | A71AT | 0 / - | 2 | Partial capture |
| 08-22 14:03 | 20m | - / - | PA2KV | 0 / - | 2 | ✓ Closing fragment |
| 08-21 15:59 | 20m | -12 / - | 4S6ARW | - / - | 2 | Partial capture |
| 08-20 09:38 | 20m | -6 / -4 | M7HQE | -6 / - | 7 | ✓ Closing observed |
| 08-20 09:37 | 20m | -9 / - | DK5OPA | -10 / -8 | 3 | Partial capture |
| 08-20 09:36 | 20m | -4 / - | IK7DTM | - / - | 2 | ✓ Closing fragment |
| 08-20 08:46 | 20m | - / -3 | F1ODM | +6 / - | 2 | Partial capture |
| 08-20 08:41 | 20m | -9 / - | VP2MAA | - / - | 5 | Partial capture |
| 08-20 08:13 | 20m | - / - | F4HSB | -15 / - | 3 | ✓ Closing fragment |
| 08-20 08:07 | 20m | - / -8 | DL3MIB | -4 / - | 3 | ✓ Closing fragment |
| 08-19 18:59 | 20m | -14 / - | BU2FW | - / - | 2 | ✓ Closing fragment |
| 08-19 18:23 | 20m | -15 / - | 9K2GR | - / -18 | 4 | ✓ Closing fragment |
| 08-19 17:09 | 20m | -17 / - | OY5T | - / - | 4 | Partial capture |
| 08-19 11:04 | 20m | - / - | PC2J | -13 / - | 2 | Partial capture |
| 08-17 17:53 | 20m | - / -4 | F4ACR | -1 / - | 4 | Partial capture |
| 08-17 16:54 | 20m | -6 / - | BG7MOM | - / -17 | 2 | ✓ Closing fragment |
| 08-17 16:52 | 20m | -8 / - | BH3WBQ | - / -12 | 2 | ✓ Closing fragment |
| 08-17 16:49 | 20m | -4 / - | 4L1MA | - / -4 | 2 | Partial capture |
| 08-17 09:18 | 20m | - / - | DL3HBF | +5 / - | 11 | Partial capture |
| 08-17 09:17 | 20m | -12 / - | M7TYH | -13 / - | 2 | ✓ Closing observed |
| 08-17 09:13 | 20m | - / - | M7TYH | -13 / - | 5 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 182245 +6 2575 F6FHZ IU5VLU RR73 182300 -9 2575 IU5VLU F6FHZ 73 184015 -2 2576 ES8JX IU5VLU JN52 184030 -15 1989 IU5VLU ES8JX -07 184045 +0 2576 ES8JX IU5VLU R-06 184100 -8 1989 IU5VLU ES8JX RR73 184115 +3 2575 ES8JX IU5VLU 73 183615 -10 1676 EX7CQ IU5VLU JN52 (x4) 184300 +2 1714 IU5VLU EX7CQ RR73 (x2) 184500 +5 1276 MW6YPO IU5VLU R-13 (x2)
UTC dB Audio Message 185445 -6 927 EA3AVS IU5VLU 73 185500 -9 731 IU5VLU G4JYU JO01 185515 -7 927 G4JYU IU5VLU -02 185530 -5 730 IU5VLU G4JYU R+04 185545 -9 927 G4JYU IU5VLU RR73 185600 -4 731 IU5VLU G4JYU 73
UTC dB Audio Message 153345 -11 1925 EA6AQG IU5VLU JN52 (x8) 074030 -6 695 YS1GMV IU5VLU JN52 (x2) 060715 -21 1722 OA1F IU5VLU JN52 (x5)
UTC dB Audio Message 190700 -3 767 IU5VLU DO1FKM JN49 190715 -6 1239 YO9PH IU5VLU 73 190730 -18 1240 IU5VLU DG1KHN JO30 190745 -9 1239 HG8LXL IU5VLU +01 190800 -6 547 IU5VLU CT1FNG +02 190815 -6 1240 HG8LXL IU5VLU RR73 190845 -12 1647 OE3ZIO IU5VLU +01 190900 -9 547 IU5VLU CT1FNG +02 190915 -9 1647 OE3ZIO IU5VLU RR73 190930 -5 547 IU5VLU CT1FNG +02 190945 -9 1648 CT1FNG IU5VLU R-05 191100 -4 547 IU5VLU CT1FNG +02 (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.
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