IS0YHV — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving IS0YHV, decoded by SO8OO in southeastern Poland. 1,021 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 30 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-18.
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 1,021 FT8 messages attributed to IS0YHV as the transmitting token by decoded message structure across 30 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (97%), followed by 10 m (2%) and 40 m (1%). Most decodes (82%) fell within the six-hour window 15:00-21:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.
Overview
Bands
Last attributed message: 2026-09-18 20:45 UTC
Observed FT8 message patterns
- Attributed sample
- 1,021 messages
- Active dates
- 30 UTC dates
- Estimated median S/N
- -10 dB
- Estimated 10th-90th percentile
- -19.3 to -2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 224, moderate (-15 to -9 dB) 380, strong (≥ -8 dB) 417.
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 IS0YHV 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 IS0YHV
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
- JM49 · 673 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,535 km (approx.)
- Last such locator decoded
- 2026-09-18 20:45 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 | IS0YHV S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-18 20:44 | 40m | - / -22 | F1PBZ | -3 / - | 3 | Partial capture |
| 09-18 20:39 | 40m | - / -9 | ON1DGN | -10 / - | 4 | ✓ Closing fragment |
| 09-09 20:03 | 40m | - / +6 | DC7MA | -5 / - | 3 | ✓ Closing fragment |
| 09-09 20:00 | 40m | - / +4 | OE8PIT | -7 / - | 4 | ✓ Closing fragment |
| 09-09 19:55 | 40m | - / -20 | UR4QWW | -8 / - | 2 | ✓ Closing fragment |
| 09-09 19:48 | 40m | - / - | PD2MAC | -10 / - | 6 | Partial capture |
| 09-09 19:46 | 40m | - / - | RA6OY | +8 / - | 6 | Partial capture |
| 09-09 19:45 | 40m | -16 / -12 | PD0ZAP | -16 / - | 4 | ✓ Closing observed |
| 09-09 19:43 | 40m | - / -2 | DF7NO | -2 / - | 2 | Partial capture |
| 09-03 20:14 | 40m | - / - | IU3QYU | -1 / - | 7 | Partial capture |
| 09-03 20:14 | 40m | - / -15 | F1PBZ | -2 / - | 4 | Partial capture |
| 09-03 20:06 | 40m | - / - | IZ1OLC | -19 / - | 3 | ✓ Closing fragment |
| 09-03 19:52 | 40m | - / -3 | IU3WOH | +3 / - | 3 | ✓ Closing fragment |
| 09-03 19:51 | 40m | - / - | DL4AMJ | 0 / - | 3 | Partial capture |
| 09-03 19:46 | 40m | - / - | DL4AMJ | -4 / - | 2 | Partial capture |
| 09-03 19:44 | 40m | - / - | LA1KUA | +5 / - | 2 | Partial capture |
| 09-03 19:41 | 40m | - / -11 | DF8RU | +9 / - | 5 | Partial capture |
| 09-03 19:41 | 40m | - / - | LA1KUA | +7 / - | 2 | Partial capture |
| 08-31 19:59 | 20m | - / - | TA2ETI | -15 / - | 3 | Partial capture |
| 08-31 19:43 | 20m | -8 / -6 | IS0KZK | -5 / -11 | 7 | ✓ Full exchange observed |
| 08-31 19:41 | 20m | -6 / - | TA2ED | - / -3 | 2 | ✓ Closing fragment |
| 08-31 19:39 | 20m | -7 / - | SP9OZ | - / -8 | 2 | ✓ Closing fragment |
| 08-31 19:30 | 20m | -6 / - | VE3NVK | -22 / -17 | 11 | Partial capture |
| 08-31 14:44 | 20m | - / - | F8EFJ | +2 / - | 2 | Partial capture |
| 08-31 14:13 | 20m | - / - | G1LVW | -12 / - | 7 | Partial capture |
| 08-31 14:04 | 20m | - / +1 | M9TMC | -11 / - | 4 | Partial capture |
| 08-31 13:53 | 20m | -10 / - | DM2AB | -1 / -13 | 5 | ✓ Closing observed |
| 08-31 13:53 | 20m | - / -11 | SV1TAJ | -11 / - | 2 | ✓ Closing fragment |
| 08-31 13:48 | 20m | -6 / -13 | M7MOK | -6 / -14 | 5 | ✓ Full exchange observed |
| 08-30 09:35 | 20m | -2 / - | SG3A | - / -16 | 2 | Partial capture |
| 08-30 09:25 | 20m | -5 / -17 | R7OV | +9 / -12 | 7 | Partial capture |
| 08-30 08:50 | 20m | -2 / - | R7OV | - / -12 | 4 | Partial capture |
| 08-30 08:41 | 20m | -12 / - | R7OV | - / -12 | 3 | Partial capture |
| 08-30 08:36 | 20m | -12 / -14 | R6OIW | +10 / -13 | 5 | ✓ Full exchange observed |
| 08-28 20:24 | 20m | -8 / - | KQ4IVE | - / -14 | 5 | Partial capture |
| 08-28 20:22 | 20m | - / -4 | G4YOH | +7 / - | 3 | ✓ Closing fragment |
| 08-28 20:19 | 20m | - / - | G4YOH | 0 / - | 2 | Partial capture |
| 08-28 20:16 | 20m | -16 / - | EI5JHB | -15 / - | 2 | ✓ Closing observed |
| 08-27 20:34 | 20m | -9 / -12 | K2TQC | -10 / - | 4 | ✓ Closing observed |
| 08-27 20:12 | 20m | - / - | W3FR | -12 / - | 9 | Partial capture |
| 08-27 20:11 | 20m | - / +7 | F4MSA | -1 / - | 2 | Partial capture |
| 08-27 20:11 | 20m | -8 / -22 | ON3AVT | +8 / -8 | 16 | ✓ Full exchange observed |
| 08-27 20:09 | 20m | -2 / - | TA2IM | - / -14 | 2 | ✓ Closing fragment |
| 08-27 20:01 | 20m | - / - | G3YCH | -6 / - | 2 | Partial capture |
| 08-27 19:55 | 20m | - / - | ON3AVT | +8 / - | 10 | Partial capture |
| 08-27 14:26 | 20m | -3 / - | W2RES | - / -18 | 3 | ✓ Closing fragment |
| 08-27 14:24 | 20m | -2 / -7 | TA3NK | -12 / -11 | 4 | ✓ Full exchange observed |
| 08-26 20:11 | 20m | - / -13 | DG5PW | -5 / - | 4 | ✓ Closing fragment |
| 08-26 20:07 | 20m | - / - | RZ4FWA | -10 / - | 4 | Partial capture |
| 08-25 19:56 | 20m | -2 / - | TA1GO | - / -12 | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 200045 -6 1244 IS0YHV OE8PIT R+04 200115 -3 362 IS0YHV PD2MAC JO22 200115 -12 1244 IS0YHV OE8PIT 73 (x2) 200345 -6 1938 IS0YHV DC7MA JN39 (x3) 203915 -14 1337 IS0YHV ON1DGN -09 (x4) 204445 -3 2543 IS0YHV F1PBZ -22 204500 -12 996 CQ IS0YHV JM49 204615 -4 2543 IS0YHV F1PBZ -22 (x2)
UTC dB Audio Message 194500 -11 831 IS0KZK IS0YHV RR73 194515 -3 831 IS0YHV IS0KZK 73 195700 -18 831 CQ IS0YHV JM49 (x3) 195915 -13 830 IS0YHV TA2ETI KM77 195930 -5 830 CQ IS0YHV JM49 195945 -18 829 IS0YHV TA2ETI KM77 200000 -1 830 CQ IS0YHV JM49 200015 -15 829 IS0YHV TA2ETI KM77 200030 -7 831 CQ IS0YHV JM49 200100 -8 830 OM2IDN IS0YHV -15 200200 -5 831 CQ IS0YHV JM49 (x3)
UTC dB Audio Message 195245 -8 670 CQ IS0YHV JM49
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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