OT4R — 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 OT4R, decoded by SO8OO in southeastern Poland. 2,349 FT8 messages attributed to this token as transmitter, on 60m, 40m, 20m, 10m, across 103 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-23.
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 2,349 FT8 messages attributed to OT4R as the transmitting token by decoded message structure across 103 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (50%), followed by 60 m (42%) and 20 m (5%). Several six-hour UTC windows tied for the largest share (55%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13.7 dB.
Overview
Bands
Last attributed message: 2026-10-23 13:58 UTC
Observed FT8 message patterns
- Attributed sample
- 2,349 messages
- Active dates
- 103 UTC dates
- Estimated median S/N
- -13.7 dB
- Estimated 10th-90th percentile
- -21 to -5 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 911, moderate (-15 to -9 dB) 869, strong (≥ -8 dB) 569.
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 OT4R 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 OT4R
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
- JO21 · 103 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,192 km (approx.)
- Last such locator decoded
- 2026-10-20 20:59 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 | OT4R S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-23 13:57 | 40m | -16 / - | LB9PJ | - / -10 | 2 | Partial capture |
| 10-23 13:56 | 40m | -16 / - | DL1PAN | - / - | 2 | Partial capture |
| 10-23 13:19 | 40m | -11 / +3 | OH3MB | -8 / -8 | 3 | ✓ Full exchange observed |
| 10-23 12:14 | 40m | -18 / - | PE1HTB | - / -2 | 2 | Partial capture |
| 10-23 09:12 | 40m | -15 / -9 | UR5DU | +6 / -14 | 7 | ✓ Full exchange observed |
| 10-23 09:11 | 40m | -16 / +6 | ON4AUB | -20 / - | 2 | ✓ Closing observed |
| 10-23 09:06 | 40m | - / -6 | SP6SOW | -14 / - | 2 | ✓ Closing fragment |
| 10-23 09:00 | 40m | -16 / -3 | ON5GQ | -17 / -1 | 4 | ✓ Full exchange observed |
| 10-23 08:57 | 40m | -15 / - | LY1BZ | - / -4 | 3 | Partial capture |
| 10-23 08:55 | 40m | -18 / - | ON7TB | - / +2 | 2 | ✓ Closing fragment |
| 10-22 13:36 | 40m | -17 / -16 | IZ3ZOW | -17 / -4 | 3 | Partial capture |
| 10-22 13:33 | 40m | -17 / - | M7IPY | -18 / 0 | 3 | ✓ Closing observed |
| 10-22 13:31 | 40m | -14 / - | R7CA/6 | - / -21 | 2 | Partial capture |
| 10-22 13:30 | 40m | -16 / +2 | M1GEO | -15 / - | 3 | ✓ Closing observed |
| 10-22 13:28 | 40m | -15 / -1 | PB0ACM | -16 / -2 | 5 | Partial capture |
| 10-22 13:26 | 40m | -19 / - | SP5XZM | - / +1 | 2 | Partial capture |
| 10-22 13:24 | 40m | -20 / +4 | DL70ASTRO | -2 / +4 | 2 | Partial capture |
| 10-22 13:22 | 40m | -19 / - | SP0YAGI | - / +4 | 2 | Partial capture |
| 10-22 13:20 | 40m | -18 / +4 | OE3RHI | -7 / -9 | 6 | ✓ Full exchange observed |
| 10-22 08:49 | 40m | - / 0 | DF7NO | -6 / - | 3 | Partial capture |
| 10-22 08:42 | 40m | -18 / - | DL8LRZ | - / -5 | 2 | Partial capture |
| 10-22 08:41 | 40m | - / -9 | SN0EG | -10 / - | 2 | ✓ Closing fragment |
| 10-22 08:37 | 40m | -17 / -9 | F4MSA | -16 / -5 | 4 | ✓ Full exchange observed |
| 10-22 08:33 | 40m | -13 / -1 | F6DAY | -8 / +4 | 5 | ✓ Full exchange observed |
| 10-22 08:31 | 40m | - / -4 | SP6CC | -14 / - | 2 | ✓ Closing fragment |
| 10-22 08:20 | 40m | -16 / - | CT7BRV | - / -10 | 3 | ✓ Closing fragment |
| 10-22 07:45 | 60m | -20 / - | F5BZB | - / +1 | 2 | Partial capture |
| 10-21 21:18 | 40m | - / -16 | UN0GY | -18 / - | 2 | ✓ Closing fragment |
| 10-21 21:13 | 40m | -20 / - | YT1ZQ | -14 / +4 | 3 | ✓ Full exchange observed |
| 10-21 21:07 | 60m | -8 / - | SP2Y | - / - | 3 | Partial capture |
| 10-21 21:06 | 60m | -7 / -7 | 9A7BB | 0 / +4 | 4 | ✓ Full exchange observed |
| 10-21 21:05 | 60m | -4 / -12 | GI8RPM | -2 / -2 | 4 | ✓ Full exchange observed |
| 10-21 21:02 | 60m | -7 / - | SM7MDI | - / -1 | 3 | Partial capture |
| 10-21 13:27 | 40m | -17 / +10 | DC7LR | -4 / -7 | 4 | ✓ Full exchange observed |
| 10-21 13:22 | 40m | -18 / -10 | OK2RM | -9 / -11 | 3 | ✓ Full exchange observed |
| 10-21 13:20 | 40m | -18 / - | DK0RWU | - / -6 | 2 | Partial capture |
| 10-21 13:17 | 40m | - / -12 | 9A2DM | -7 / - | 2 | ✓ Closing fragment |
| 10-21 13:13 | 40m | -18 / - | M8UKQ | - / -3 | 3 | Partial capture |
| 10-21 13:06 | 40m | -21 / - | SM5UNR | - / -10 | 3 | Partial capture |
| 10-21 13:03 | 40m | -18 / -7 | DD1LD | -12 / -5 | 5 | ✓ Full exchange observed |
| 10-21 13:00 | 40m | -15 / - | OH1TEV | -12 / -21 | 4 | Partial capture |
| 10-21 13:00 | 40m | -19 / -7 | OM2IB | +3 / +3 | 4 | ✓ Full exchange observed |
| 10-21 12:57 | 40m | -20 / - | DL3NDQ | - / -3 | 4 | ✓ Closing fragment |
| 10-21 12:56 | 40m | -14 / - | S56TNT | - / -7 | 2 | Partial capture |
| 10-21 12:52 | 40m | -21 / -2 | OK2CNI | -7 / -7 | 5 | ✓ Full exchange observed |
| 10-21 12:50 | 40m | -16 / -7 | DG6CHI | -6 / -9 | 4 | ✓ Full exchange observed |
| 10-21 12:08 | 40m | -20 / - | ON1PT | - / +7 | 2 | Partial capture |
| 10-21 12:04 | 40m | -20 / - | ON2AJ | - / +7 | 2 | ✓ Closing fragment |
| 10-21 12:02 | 40m | -21 / +3 | DF9ES | -19 / - | 4 | ✓ Closing observed |
| 10-20 21:20 | 40m | -11 / -5 | EC5AN | -4 / +6 | 5 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 091415 +6 767 OT4R UR5DU 73 120845 -13 560 OT4R DK5SCM 73 121445 -20 1449 PE1HTB OT4R -02 (x2) 121615 -14 1449 M0PWC OT4R RR73 131900 -11 1373 OH3MB OT4R -08 131915 -10 1472 OT4R OH3MB R+03 (x2) 132515 -14 1373 PA2DX OT4R RR73 132745 -14 1373 PA3NOR OT4R -09 133015 -13 1373 OE3RHI OT4R -12 135645 -15 1464 DL1PAN OT4R +12 (x2) 135745 -16 1464 LB9PJ OT4R -10 (x2)
UTC dB Audio Message 210415 -6 1451 SM7MDI OT4R -01 (x2) 210530 -4 1451 GI8RPM OT4R -02 210545 -3 587 OT4R GI8RPM R-12 210600 -3 1451 GI8RPM OT4R RR73 210615 +0 587 OT4R GI8RPM 73 210630 -8 1451 9A7BB OT4R +04 210645 -1 2099 OT4R 9A7BB R-07 210700 -6 1451 9A7BB OT4R RR73 210715 +1 2099 OT4R 9A7BB 73 210730 -11 1451 SP2Y OT4R +19 (x3) 074515 -18 1403 F5BZB OT4R +01 (x2)
UTC dB Audio Message 134600 +3 1418 UR5WCS OT4R -08 134900 +5 1418 SQ8MA OT4R +00 134930 +3 1418 SP3Q OT4R JO21 135000 +7 1418 SQ8MA OT4R RR73 (x2) 135330 +1 1418 UR5WCS OT4R -05 113715 -13 1479 CT1END/P OT4R R-07 083945 +0 1514 Z62NS OT4R +10 (x4) 084245 +3 1514 SQ5ROB OT4R +11 (x2) 090030 +1 1514 CT2JTN OT4R +11 (x2)
UTC dB Audio Message 082915 -12 1838 OT4R IV3TUO R+04 (x2) 090800 -22 1459 OE1AVO OT4R +10 092045 -10 1460 OT4R F4ETS R-13 (x2) 131830 -18 1502 OT4R F5THL R-03 (x2) 083130 -16 1398 OT4R IT9CMZ 73 085245 -22 1905 OT4R IU8QRL R-04 114715 -12 2394 OT4R D2ACE 73 092100 -22 1528 OK1HWS OT4R -04 (x2) 130800 -24 1391 <...> OT4R -13
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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