F1IRJ — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving F1IRJ, decoded by SO8OO in southeastern Poland. 77 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 8 UTC dates in the available aggregate history. Observed between 2026-06-25 and 2026-09-01.
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 77 FT8 messages attributed to F1IRJ as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (95%), followed by 40 m (3%) and 10 m (3%). Most decodes (51%) fell within the six-hour window 13:00-19:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (84%); the estimated median was +2 dB.
Overview
Bands
Last attributed message: 2026-09-01 05:13 UTC
Observed FT8 message patterns
- Attributed sample
- 77 messages
- Active dates
- 8 UTC dates
- Estimated median S/N
- +2 dB
- Estimated 10th-90th percentile
- -9 to +15 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 12, strong (≥ -8 dB) 65.
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 F1IRJ 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 F1IRJ
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
- JN23 · 23 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,462 km (approx.)
- Last such locator decoded
- 2026-08-18 15:18 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 | F1IRJ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-01 05:12 | 40m | -5 / - | PV8AJ | - / -3 | 2 | Partial capture |
| 08-18 15:12 | 20m | - / - | F5ADE | +8 / - | 2 | Partial capture |
| 08-18 15:10 | 20m | +15 / - | UR5XEJ | - / -11 | 2 | ✓ Closing fragment |
| 08-18 15:08 | 20m | +10 / - | RL3K | - / -12 | 2 | ✓ Closing fragment |
| 08-18 15:06 | 20m | +11 / +1 | TA3NK | -15 / -2 | 3 | ✓ Full exchange observed |
| 08-18 15:04 | 20m | +8 / - | TA3RAM | - / +7 | 2 | ✓ Closing fragment |
| 08-16 13:33 | 20m | - / -5 | DL1RAZ | -2 / - | 4 | ✓ Closing fragment |
| 08-16 07:50 | 20m | -4 / - | UA1AOF | - / -20 | 3 | ✓ Closing fragment |
| 08-16 07:50 | 20m | - / - | EB3JT | +1 / - | 3 | Partial capture |
| 08-16 07:50 | 20m | - / -11 | IU8JLX | -14 / - | 2 | Partial capture |
| 08-16 07:45 | 20m | +6 / - | OK1DBE | +2 / +4 | 4 | ✓ Closing observed |
| 08-16 07:32 | 20m | +12 / - | <...> | - / -18 | 2 | Partial capture |
| 08-16 07:23 | 20m | -9 / - | UT7UJ | +13 / +6 | 3 | ✓ Full exchange observed |
| 08-16 07:21 | 20m | - / - | DL3LBK | -1 / - | 5 | Partial capture |
| 08-16 07:14 | 20m | - / -10 | DK4FH | -4 / - | 2 | Partial capture |
| 08-16 07:14 | 20m | - / +3 | RN6MA | +10 / - | 2 | ✓ Closing fragment |
| 08-16 07:12 | 20m | -5 / - | RK4FF | - / +1 | 2 | ✓ Closing fragment |
| 08-16 07:10 | 20m | -6 / -20 | F4LNM | -6 / +3 | 4 | ✓ Full exchange observed |
| 08-16 07:08 | 20m | -4 / - | PD3LKN | -10 / -8 | 3 | Partial capture |
| 08-16 07:05 | 20m | -8 / - | UA6HGM | - / -15 | 2 | ✓ Closing fragment |
| 06-30 17:52 | 20m | +9 / - | BH9CA | - / -11 | 2 | ✓ Closing fragment |
| 06-29 18:03 | 20m | +15 / -8 | A91LD | -8 / +2 | 4 | Partial capture |
| 06-29 18:02 | 20m | +9 / - | BD1TX | - / -16 | 2 | ✓ Closing fragment |
| 06-29 17:56 | 20m | +15 / - | 9K2KU | - / -10 | 5 | Partial capture |
| 06-29 17:54 | 20m | -4 / - | ZL1GT | - / -20 | 2 | ✓ Closing fragment |
| 06-29 17:52 | 20m | +1 / - | 8A1WWA | - / -11 | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 051215 -5 545 PV8AJ F1IRJ -03 (x2)
UTC dB Audio Message 150715 +12 577 TA3NK F1IRJ RR73 150800 +4 575 CQ F1IRJ JN23 150830 +9 575 RL3K F1IRJ -12 (x2) 150930 +12 573 CQ F1IRJ JN23 a1 (x2) 151030 +17 572 UR5XEJ F1IRJ -11 (x2) 151200 +11 570 CQ F1IRJ JN23 151245 +4 2874 F1IRJ F5ADE JN07 (x2) 151700 +3 564 OH5C/P F1IRJ -11 151800 +2 563 CQ F1IRJ JN23 (x2) 160330 +20 565 BH3WBQ F1IRJ -25
UTC dB Audio Message 161400 -9 583 CX6TE F1IRJ -16 160145 -7 570 A91LD F1IRJ -14
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.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee