ON3RT — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving ON3RT, decoded by SO8OO in southeastern Poland. 140 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-20.
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 140 FT8 messages attributed to ON3RT as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (64%), followed by 20 m (28%) and 40 m (9%). Several six-hour UTC windows tied for the largest share (69%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -17 dB.
Overview
Bands
Last attributed message: 2026-09-20 05:36 UTC
Observed FT8 message patterns
- Attributed sample
- 140 messages
- Active dates
- 9 UTC dates
- Estimated median S/N
- -17 dB
- Estimated 10th-90th percentile
- -23 to -8 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 83, moderate (-15 to -9 dB) 42, strong (≥ -8 dB) 15.
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 ON3RT 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 ON3RT
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
- JO20 · 113 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,194 km (approx.)
- Last such locator decoded
- 2026-09-20 05:36 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 | ON3RT S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-20 07:47 | 40m | - / -13 | PD1HTW | -11 / - | 2 | ✓ Closing fragment |
| 09-20 07:20 | 40m | - / - | IZ2EWN | -2 / - | 5 | Partial capture |
| 09-20 06:55 | 40m | - / - | IZ2EWN | -8 / - | 3 | Partial capture |
| 09-20 06:45 | 40m | - / -8 | IW2NEF | -14 / - | 2 | ✓ Closing fragment |
| 09-20 06:44 | 40m | - / -14 | IU5SCG | -14 / - | 2 | ✓ Closing fragment |
| 09-20 06:17 | 40m | - / -14 | 2E0TXZ | -9 / - | 3 | ✓ Closing fragment |
| 09-20 06:08 | 40m | - / -5 | DH5NC | -5 / - | 2 | ✓ Closing fragment |
| 09-20 05:27 | 40m | -14 / - | G8KHF | - / - | 2 | Partial capture |
| 09-19 06:14 | 40m | - / -8 | IN3WZS | 0 / - | 2 | ✓ Closing fragment |
| 09-19 05:53 | 40m | - / -18 | OK1ZJK | +12 / - | 9 | Partial capture |
| 09-19 05:46 | 40m | -17 / -14 | SN40KZE | +12 / +9 | 3 | Partial capture |
| 09-19 05:42 | 40m | - / - | 9A4ZM | +6 / - | 2 | Partial capture |
| 09-17 06:31 | 40m | - / +4 | SP8WB | +6 / - | 2 | ✓ Closing fragment |
| 09-17 06:30 | 40m | - / - | 9A4ZM | +2 / - | 2 | Partial capture |
| 09-17 06:00 | 40m | - / -6 | F4FSY | -10 / - | 2 | Partial capture |
| 09-17 05:53 | 40m | -19 / -16 | LY2EW | -5 / -12 | 7 | ✓ Full exchange observed |
| 09-17 05:52 | 40m | - / - | DL6UM | -2 / - | 4 | Partial capture |
| 09-17 05:50 | 40m | - / - | LY2EW | +2 / - | 2 | Partial capture |
| 09-17 05:39 | 40m | - / -10 | OZ1KZX | -1 / - | 2 | ✓ Closing fragment |
| 09-17 05:36 | 40m | - / -18 | LZ3BS | +6 / - | 2 | ✓ Closing fragment |
| 09-17 05:20 | 40m | - / +1 | IK4TVP | -7 / - | 4 | Partial capture |
| 09-17 05:20 | 40m | - / - | US2YW | 0 / - | 4 | Partial capture |
| 08-29 14:59 | 40m | - / - | HB9IIH | -17 / - | 3 | Partial capture |
| 08-29 14:46 | 40m | - / -13 | F1PBZ | -6 / - | 3 | Partial capture |
| 08-23 08:41 | 20m | -9 / -16 | ON4AOI | +24 / -4 | 4 | ✓ Full exchange observed |
| 08-23 05:07 | 40m | - / - | HA3HX | -1 / - | 4 | Partial capture |
| 08-05 09:23 | 20m | - / -11 | SP2LMG | -11 / - | 2 | ✓ Closing fragment |
| 07-18 11:32 | 20m | - / -14 | EA5GOZ | -24 / - | 2 | Partial capture |
| 07-18 10:22 | 20m | - / -9 | MI0OBC | -14 / - | 3 | ✓ Closing fragment |
| 07-18 09:44 | 20m | - / -11 | OE3KJO | -10 / - | 4 | Partial capture |
| 07-18 09:28 | 20m | - / -8 | EA3FHP | -10 / - | 2 | ✓ Closing fragment |
| 07-05 08:13 | 10m | -19 / - | SV4DCQ | - / - | 3 | Partial capture |
| 07-05 08:07 | 10m | -18 / - | UA3RA | - / - | 6 | Partial capture |
| 07-05 08:06 | 10m | -16 / - | UR5WBO | - / +4 | 2 | ✓ Closing fragment |
| 07-05 08:03 | 10m | -18 / - | F4EOC | - / - | 2 | Partial capture |
| 07-05 07:56 | 10m | -22 / - | F4EOC | - / - | 2 | Partial capture |
| 07-05 07:51 | 10m | -20 / - | SN0WWA | - / - | 5 | Partial capture |
| 07-05 07:46 | 10m | -20 / - | SP8PLA | - / - | 2 | Partial capture |
| 07-05 07:41 | 10m | -19 / - | HF7X | - / - | 2 | ✓ Closing fragment |
| 07-05 07:37 | 10m | -18 / - | LZ3AN | - / -3 | 2 | Partial capture |
| 07-05 07:31 | 10m | -22 / - | R9SBY | - / - | 6 | Partial capture |
| 07-05 07:27 | 10m | -22 / - | YT2SMS | - / - | 4 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 064400 -14 239 ON3RT IU5SCG -14 (x2) 064530 -15 287 ON3RT IW2NEF -08 (x2) 065500 -7 1969 ON3RT IZ2EWN JN45 (x9) 074730 -12 1033 ON3RT PD1HTW -13 (x2)
UTC dB Audio Message 082845 -7 631 CQ CQ ON3RT JO20 (x7) 084130 +23 606 ON3RT ON4AOI -16 084130 -15 1135 ON3RT EA7UW IM76 084145 -9 611 ON4AOI ON3RT R-04 084200 +24 606 ON3RT ON4AOI RR73 084215 -9 611 ON4AOI ON3RT 73 084245 -11 611 CQ ON3RT JO20 (x3)
UTC dB Audio Message 075700 -19 1500 F4EOC ON3RT JO20 (x3) 080600 -18 1499 UR5WBO ON3RT R+04 (x2) 080700 -18 1500 UA3RA ON3RT JO20 (x6) 081315 -20 1500 SV4DCQ ON3RT JO20 (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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