IZ5FSO — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving IZ5FSO, decoded by SO8OO in southeastern Poland. 1,340 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 93 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-08.
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 1,340 FT8 messages attributed to IZ5FSO as the transmitting token by decoded message structure across 93 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (53%), followed by 80 m (28%) and 20 m (19%). Several six-hour UTC windows tied for the largest share (79%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9.3 dB.
Overview
Bands
Last attributed message: 2026-09-08 16:02 UTC
Observed FT8 message patterns
- Attributed sample
- 1,340 messages
- Active dates
- 93 UTC dates
- Estimated median S/N
- -9.3 dB
- Estimated 10th-90th percentile
- -17 to +1 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 231, moderate (-15 to -9 dB) 501, strong (≥ -8 dB) 608.
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 IZ5FSO 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 IZ5FSO
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
- JN53 · 638 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,089 km (approx.)
- Last such locator decoded
- 2026-09-08 16:01 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 | IZ5FSO S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-08 16:01 | 40m | -9 / -2 | DJ0MAB | -3 / -1 | 5 | ✓ Full exchange observed |
| 09-08 16:00 | 40m | - / +7 | IW0FGX | -8 / - | 2 | Partial capture |
| 09-08 16:00 | 40m | -8 / - | IW2CAK | -14 / -4 | 3 | ✓ Closing observed |
| 09-08 03:48 | 40m | - / - | RA4FUT | -6 / - | 3 | Partial capture |
| 09-08 03:46 | 40m | -14 / - | S51TN | - / - | 2 | Partial capture |
| 09-08 03:43 | 80m | -18 / - | HF100PKP | - / - | 2 | Partial capture |
| 09-08 03:42 | 80m | -16 / -16 | SP7OK | -3 / -24 | 4 | ✓ Full exchange observed |
| 09-08 03:38 | 80m | -7 / -10 | MI0NWA | -6 / -7 | 5 | ✓ Full exchange observed |
| 09-08 03:37 | 80m | -7 / -8 | DL3HN | -4 / -8 | 4 | ✓ Full exchange observed |
| 09-08 03:35 | 80m | -15 / -19 | DO8JB | +4 / -12 | 5 | ✓ Full exchange observed |
| 09-08 03:34 | 80m | -17 / -2 | YO3OBB | +12 / -12 | 5 | ✓ Full exchange observed |
| 09-08 03:32 | 80m | -10 / -11 | YU7AS | +20 / -2 | 5 | ✓ Full exchange observed |
| 09-08 03:31 | 80m | - / - | DL9KM | -1 / - | 5 | Partial capture |
| 09-08 03:31 | 80m | -10 / - | OZ6MM | - / -24 | 3 | Partial capture |
| 09-08 03:30 | 80m | - / -5 | ON1JP | -9 / - | 5 | Partial capture |
| 09-08 03:29 | 80m | -8 / -3 | IT9VCE | +8 / +2 | 5 | ✓ Full exchange observed |
| 09-08 03:28 | 80m | -6 / - | DO5HOK | - / - | 2 | Partial capture |
| 09-07 03:35 | 80m | -15 / - | DO5HOK | - / - | 3 | Partial capture |
| 09-07 03:33 | 80m | -13 / -1 | DO1ID | +6 / -7 | 5 | ✓ Full exchange observed |
| 09-06 05:54 | 40m | -9 / -13 | SQ6EMJ | +2 / -9 | 7 | ✓ Full exchange observed |
| 09-06 05:47 | 40m | -10 / -8 | SN40KZE | +10 / -1 | 6 | Partial capture |
| 09-06 05:44 | 40m | -8 / -18 | DM8MH | -2 / -17 | 6 | ✓ Full exchange observed |
| 09-06 05:42 | 40m | -14 / - | G0OYQ | - / -12 | 2 | Partial capture |
| 09-06 05:40 | 40m | -14 / - | IU4SQE | - / -17 | 3 | ✓ Closing fragment |
| 09-06 05:38 | 40m | - / - | RR73; | -13 / - | 2 | Partial capture |
| 09-06 05:37 | 40m | -16 / -9 | SO100PKP | -10 / -4 | 3 | Partial capture |
| 09-06 03:48 | 80m | 0 / - | EG3PDA | - / -1 | 4 | Partial capture |
| 09-06 03:47 | 80m | -2 / 0 | DO1ID | +11 / +4 | 5 | ✓ Full exchange observed |
| 09-06 03:43 | 80m | - / +1 | OU7M/P | -7 / - | 2 | Partial capture |
| 09-06 03:39 | 40m | -4 / - | SN40KZE | - / +6 | 2 | Partial capture |
| 09-06 03:37 | 40m | +3 / - | EG1DDA | - / -12 | 3 | ✓ Closing fragment |
| 09-06 03:36 | 40m | +4 / -9 | UY0HY | +8 / +2 | 4 | ✓ Full exchange observed |
| 09-06 03:34 | 40m | -1 / - | OZ3FYN/P | - / +1 | 3 | ✓ Closing fragment |
| 09-06 03:34 | 40m | - / - | UR4QWW | -7 / - | 6 | Partial capture |
| 09-06 03:33 | 40m | 0 / - | CR7BRV | -12 / -8 | 4 | ✓ Closing observed |
| 09-05 03:52 | 80m | -4 / -1 | SN40KZE | +5 / -5 | 3 | Partial capture |
| 09-05 03:42 | 80m | - / -18 | MI0OBC | +1 / - | 2 | Partial capture |
| 09-05 03:39 | 80m | -6 / -14 | SP3HGD | +1 / -12 | 6 | ✓ Full exchange observed |
| 09-05 03:38 | 80m | -11 / - | F4CTJ | - / - | 3 | Partial capture |
| 09-05 03:33 | 40m | - / -11 | MW0UPH | -13 / - | 2 | ✓ Closing fragment |
| 09-04 16:30 | 40m | -9 / +5 | IK4RVY | -4 / -4 | 5 | ✓ Full exchange observed |
| 09-04 16:28 | 40m | -10 / - | SP9TEX | - / +1 | 3 | ✓ Closing fragment |
| 09-04 15:52 | 40m | -12 / -5 | DC2CB | -12 / -5 | 5 | ✓ Full exchange observed |
| 09-04 03:46 | 40m | +2 / - | R2EA | - / -10 | 3 | ✓ Closing fragment |
| 09-04 03:45 | 40m | +1 / - | SP7OK | - / +7 | 3 | ✓ Closing fragment |
| 09-04 03:41 | 80m | -2 / -6 | DD0AM | -2 / -20 | 5 | ✓ Full exchange observed |
| 09-04 03:39 | 80m | -6 / -11 | YO3OBB | +1 / - | 3 | ✓ Closing observed |
| 09-04 03:38 | 80m | -6 / - | HB10GBT | - / -8 | 2 | Partial capture |
| 09-03 16:02 | 40m | - / -8 | UT2PC | +3 / - | 2 | Partial capture |
| 09-03 03:49 | 80m | -9 / -21 | SM7TZK | 0 / -14 | 7 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 034700 -10 989 CR7BRV IZ5FSO JN53 034845 -5 990 IZ5FSO RA4FUT LO23 034900 -17 1241 LZ7VV IZ5FSO JN53 034915 -6 990 IZ5FSO RA4FUT LO23 (x2) 160000 -10 593 IW2CAK IZ5FSO R-04 160015 -14 594 IZ5FSO IW2CAK RR73 160030 -7 593 IW2CAK IZ5FSO 73 160045 -10 1043 IZ5FSO IW0FGX +07 160115 -9 810 DJ0MAB IZ5FSO JN53 160115 -6 1043 IZ5FSO IW0FGX +07 160130 -1 810 IZ5FSO DJ0MAB -02 160145 -9 810 DJ0MAB IZ5FSO R-01 160200 -5 811 IZ5FSO DJ0MAB RR73 160215 -8 809 DJ0MAB IZ5FSO 73
UTC dB Audio Message 033730 -3 979 IZ5FSO DL3HN -08 033745 -10 978 DL3HN IZ5FSO R-08 033800 -5 979 IZ5FSO DL3HN RR73 033815 -4 979 DL3HN IZ5FSO 73 033845 -7 546 MI0NWA IZ5FSO JN53 033900 -6 546 IZ5FSO MI0NWA -10 033915 -9 546 MI0NWA IZ5FSO R-07 033930 -6 547 IZ5FSO MI0NWA RR73 033945 -5 546 MI0NWA IZ5FSO 73 034200 -15 1220 SP7OK IZ5FSO JN53 034215 -6 1221 IZ5FSO SP7OK -16 034230 -16 1220 SP7OK IZ5FSO R-24 034245 +0 1220 IZ5FSO SP7OK RR73 034345 -20 929 HF100PKP IZ5FSO JN53 (x2)
UTC dB Audio Message 133030 +6 679 IZ5FSO PD0PMF -24 (x2) 133115 +3 678 PD0PMF IZ5FSO 73 055545 -15 1039 IZ5FSO OD5ZZ -07 055700 -8 1134 IZ5FSO SV8JVM -13 160515 -10 995 EA4IVO IZ5FSO JN53 (x2) 160745 -12 1274 PA2JH IZ5FSO JN53 162145 +8 905 IZ5FSO G3EFG +01 (x2) 142500 +3 951 IZ5FSO DL3EBJ -01 142515 -9 952 DL3EBJ IZ5FSO R-08 (x3) 142630 -1 951 IZ5FSO DL3EBJ RR73
UTC dB Audio Message 162400 -8 709 IZ5FSO SV2CLJ RR73 115600 -15 1158 IZ5FSO DN9HAN -18 165100 -8 841 IZ5FSO DL2UW -11 (x12) 130530 -16 980 IZ5FSO ON1JP -21
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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