IU8SDA — 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 IU8SDA, decoded by SO8OO in southeastern Poland. 1,108 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 63 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-18.
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 1,108 FT8 messages attributed to IU8SDA as the transmitting token by decoded message structure across 63 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (70%), followed by 60 m (16%) and 40 m (9%). Most decodes (63%) fell within the six-hour window 00:00-06:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (83%); the estimated median was 0 dB.
Overview
Bands
Last attributed message: 2026-10-18 02:47 UTC
Observed FT8 message patterns
- Attributed sample
- 1,108 messages
- Active dates
- 63 UTC dates
- Estimated median S/N
- 0 dB
- Estimated 10th-90th percentile
- -12.2 to +8 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 77, moderate (-15 to -9 dB) 115, strong (≥ -8 dB) 916.
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 IU8SDA 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 IU8SDA
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
- JN71 · 625 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,075 km (approx.)
- Last such locator decoded
- 2026-10-18 02:47 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 | IU8SDA S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-18 02:41 | 80m | 0 / - | YU65AEC | - / 0 | 2 | Partial capture |
| 10-18 02:39 | 80m | - / - | DK8HC | +6 / - | 4 | Partial capture |
| 10-18 02:39 | 80m | - / - | DO1OAS | 0 / - | 5 | Partial capture |
| 10-18 02:38 | 80m | - / -3 | F1PBZ | +7 / - | 3 | Partial capture |
| 10-18 02:38 | 80m | - / - | ON4MAP | -6 / - | 2 | Partial capture |
| 10-18 02:38 | 80m | - / - | DO5PY | +4 / - | 5 | Partial capture |
| 10-16 03:26 | 80m | +5 / - | TI2SD | - / -14 | 4 | ✓ Closing fragment |
| 10-16 03:23 | 80m | +5 / -1 | VP2MAW | -14 / -11 | 6 | ✓ Full exchange observed |
| 10-16 03:18 | 80m | -1 / - | VP2MAW | - / - | 2 | Partial capture |
| 10-15 17:45 | 80m | +2 / - | DA6IT | - / -13 | 2 | ✓ Closing fragment |
| 10-15 17:45 | 80m | +6 / - | R9FE | +1 / -7 | 6 | ✓ Closing observed |
| 10-15 17:44 | 80m | +2 / -10 | R2DDN | -11 / -18 | 5 | ✓ Full exchange observed |
| 10-15 17:41 | 80m | +4 / - | UA9CMN | - / - | 2 | Partial capture |
| 10-15 04:17 | 60m | -9 / - | EA5HM | - / 0 | 2 | ✓ Closing fragment |
| 10-15 04:15 | 60m | -10 / - | HC5F | - / -18 | 3 | ✓ Closing fragment |
| 10-15 01:34 | 80m | - / - | DO1OAS | -11 / - | 9 | Partial capture |
| 10-15 01:33 | 80m | +4 / - | RA4CCL | - / -12 | 2 | ✓ Closing fragment |
| 10-15 01:31 | 80m | +2 / - | DO1LKG | - / -8 | 2 | ✓ Closing fragment |
| 10-15 01:30 | 80m | +2 / +9 | 9A7V | +11 / 0 | 5 | ✓ Full exchange observed |
| 10-15 01:28 | 80m | +4 / +1 | SQ6ELK | -2 / -4 | 4 | ✓ Full exchange observed |
| 10-15 01:24 | 80m | +5 / - | RV6F | - / -18 | 5 | ✓ Closing fragment |
| 10-15 01:23 | 80m | - / - | DK8HC | -7 / - | 3 | Partial capture |
| 10-15 01:22 | 80m | - / - | ON4MAP | -12 / - | 4 | Partial capture |
| 10-14 19:20 | 80m | +5 / - | EA4FAM | - / -18 | 2 | ✓ Closing fragment |
| 10-14 19:19 | 80m | +11 / -12 | DF5AH | -6 / -14 | 4 | ✓ Full exchange observed |
| 10-14 19:17 | 80m | +10 / -8 | R5AV | -2 / -8 | 4 | ✓ Full exchange observed |
| 10-14 19:08 | 80m | +10 / - | RU3VT | - / -20 | 2 | ✓ Closing fragment |
| 10-14 19:07 | 80m | +6 / -1 | E75D | -8 / -1 | 4 | ✓ Full exchange observed |
| 10-14 19:06 | 80m | +7 / - | JF8QNF | - / -15 | 2 | ✓ Closing fragment |
| 10-14 19:03 | 80m | +3 / +4 | UA3SCU | -3 / - | 2 | ✓ Closing observed |
| 10-14 19:02 | 80m | +8 / - | DL9PN | -8 / -11 | 4 | ✓ Closing observed |
| 10-14 19:00 | 80m | +7 / - | UX0CZ | - / -11 | 3 | ✓ Closing fragment |
| 10-14 18:59 | 80m | - / - | DK8HC | -1 / - | 5 | Partial capture |
| 10-12 18:20 | 80m | +2 / +3 | DL7ACA | +10 / -4 | 6 | ✓ Full exchange observed |
| 10-12 18:19 | 80m | -4 / -2 | YL3CW | +8 / -17 | 4 | ✓ Full exchange observed |
| 10-12 18:11 | 80m | +2 / - | DL1IP | +4 / 0 | 3 | Partial capture |
| 10-12 18:11 | 80m | +2 / -18 | US3LX | -8 / -11 | 5 | ✓ Full exchange observed |
| 10-12 17:45 | 40m | -12 / - | EY7BM | - / - | 2 | Partial capture |
| 10-10 04:42 | 80m | - / - | DL9KM | 0 / - | 2 | Partial capture |
| 10-10 04:39 | 80m | +1 / - | XE2X | -7 / -12 | 4 | ✓ Closing observed |
| 10-06 05:10 | 80m | - / -6 | KP2B | -15 / - | 2 | ✓ Closing fragment |
| 10-06 01:47 | 80m | +1 / -22 | N3F | -13 / -19 | 4 | ✓ Full exchange observed |
| 10-06 01:40 | 80m | +4 / - | N3F | - / - | 2 | Partial capture |
| 10-06 01:35 | 80m | - / - | DK8HC | +6 / - | 4 | Partial capture |
| 10-06 01:33 | 80m | +4 / -17 | UN7CL | -18 / -14 | 6 | ✓ Full exchange observed |
| 10-05 18:42 | 60m | - / - | IK5ZPV | -3 / - | 4 | Partial capture |
| 10-05 18:41 | 60m | +3 / - | HF1Z | -6 / -1 | 5 | ✓ Closing observed |
| 10-05 18:40 | 60m | +2 / 0 | SN5WD | -8 / -3 | 5 | ✓ Full exchange observed |
| 10-05 18:39 | 60m | +1 / - | OH0KCE | -13 / -12 | 3 | ✓ Closing observed |
| 10-05 18:39 | 60m | -1 / +4 | DK1XAM | -3 / - | 4 | ✓ Closing observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 023915 +2 1701 CQ IU8SDA JN71 023930 +5 455 IU8SDA F1PBZ -03 023930 +5 2302 IU8SDA DO5PY JN49 023930 +5 1702 IU8SDA DO1OAS JO51 023930 +8 565 IU8SDA DK8HC JO42 024000 +5 2302 IU8SDA DO5PY JN49 024000 -3 1702 IU8SDA DO1OAS JO51 024000 +4 565 IU8SDA DK8HC JO42 024030 -1 1702 IU8SDA DO1OAS JO51 (x2) 024100 +4 565 IU8SDA DK8HC JO42 024115 +0 1701 YU65AEC IU8SDA JN71 024130 +5 1430 IU8SDA F5OYA/P +10 024145 +0 1701 YU65AEC IU8SDA R+00 024700 +4 1701 AG2K IU8SDA JN71
UTC dB Audio Message 184145 -6 1682 IU8SDA HF1Z JO73 184215 -6 1334 IU8SDA IZ2ACM JN45 184215 +0 1262 IU8SDA IK5ZPV JN53 184215 -5 1682 IU8SDA HF1Z JO73 184230 +5 1681 HF1Z IU8SDA -01 184245 -6 1260 IU8SDA IK5ZPV JN53 184300 +1 1681 HF1Z IU8SDA RR73 184315 -8 1682 IU8SDA HF1Z 73 184345 -3 1262 IU8SDA IK5ZPV JN53 (x2) 041530 -11 1667 HC5F IU8SDA JN71 (x3) 041700 -10 1667 EA5HM IU8SDA +00 (x2)
UTC dB Audio Message 020130 -15 1687 IU8SDA G3TKT 73 020330 -5 733 IU8SDA UN9LCW MO13 (x3) 020600 -8 2506 IU8SDA KI8JP RR73 020800 -11 1685 IU8SDA W1RQ FN42 (x6) 174530 -9 1720 EY7BM IU8SDA JN71 (x4)
UTC dB Audio Message 174415 -18 1546 XU7O IU8SDA R-12 (x2) 004300 -16 1849 N5TAN IU8SDA JN71 (x8)
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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