JR4OZR — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving JR4OZR, decoded by SO8OO in southeastern Poland. 33 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 8 UTC dates in the available aggregate history. Observed between 2026-07-11 and 2026-09-15.
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 33 FT8 messages attributed to JR4OZR as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (58%), followed by 80 m (42%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.
Overview
Bands
Last attributed message: 2026-09-15 20:42 UTC
Observed FT8 message patterns
- Attributed sample
- 33 messages
- Active dates
- 8 UTC dates
- Estimated median S/N
- -9 dB
- Estimated 10th-90th percentile
- -16 to -5 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 16.
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 JR4OZR 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 JR4OZR
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
- PM75 · 6 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,477 km (approx.)
- Last such locator decoded
- 2026-09-15 20:42 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 | JR4OZR S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-18 20:56 | 80m | - / -16 | YL3KZ | -4 / - | 3 | Partial capture |
| 09-15 20:38 | 80m | -9 / - | LX2A | - / -9 | 6 | Partial capture |
| 09-15 20:07 | 40m | -8 / - | RI1FJZ | - / -11 | 2 | Partial capture |
| 09-13 20:38 | 80m | - / - | OK2VCR | +5 / - | 7 | Partial capture |
| 09-13 20:36 | 80m | - / -15 | UX1AA | -5 / - | 6 | ✓ Closing fragment |
| 09-13 20:35 | 80m | - / -16 | S59A | +23 / - | 2 | ✓ Closing fragment |
| 09-11 20:44 | 80m | - / - | DF8AA | +10 / - | 2 | Partial capture |
| 09-11 20:41 | 80m | - / - | DO2RG | +2 / - | 4 | Partial capture |
| 09-11 20:39 | 80m | -12 / -12 | RA6YDX | -8 / - | 5 | ✓ Closing observed |
| 09-11 20:38 | 80m | - / - | SV8TCK | -6 / - | 2 | Partial capture |
| 09-11 20:37 | 80m | - / - | RO2X | +4 / - | 3 | Partial capture |
| 09-11 20:36 | 80m | - / -20 | EA3FCQ | -5 / - | 5 | ✓ Closing fragment |
| 09-11 20:36 | 80m | - / - | DF8AA | +7 / - | 3 | Partial capture |
| 09-11 20:35 | 80m | - / - | G4ZFJ | -1 / - | 3 | Partial capture |
| 09-11 20:35 | 80m | -11 / -16 | Z62NS | +4 / -16 | 4 | ✓ Full exchange observed |
| 09-11 20:35 | 80m | - / -13 | ON6AA | +6 / - | 4 | ✓ Closing fragment |
| 09-06 20:47 | 80m | - / -9 | 5Z4VJ | -22 / - | 2 | ✓ Closing fragment |
| 09-02 16:43 | 80m | - / - | RM3ZR | +2 / - | 2 | Partial capture |
| 09-02 16:38 | 80m | - / - | RM3ZR | +4 / - | 3 | Partial capture |
| 09-02 16:38 | 80m | - / - | UA4FKT | +2 / - | 3 | Partial capture |
| 09-02 16:35 | 80m | - / - | RA3OR | -8 / - | 5 | Partial capture |
| 08-20 20:18 | 80m | - / - | EW8CW | -7 / - | 6 | Partial capture |
| 08-20 20:18 | 80m | - / - | HA7XL | +19 / - | 6 | Partial capture |
| 08-18 20:23 | 80m | - / - | DK5WL | -13 / - | 3 | Partial capture |
| 08-18 20:23 | 80m | - / - | SP2HNF | +12 / - | 6 | Partial capture |
| 08-17 20:41 | 40m | -9 / - | CN8NS | - / -6 | 3 | ✓ Closing fragment |
| 08-09 20:22 | 40m | -6 / +7 | Z34K | -8 / -8 | 4 | ✓ Full exchange observed |
| 08-09 20:22 | 40m | - / - | OK2VCR | -9 / - | 6 | Partial capture |
| 08-09 20:21 | 40m | - / - | RA6YDX | -4 / - | 6 | Partial capture |
| 08-09 20:19 | 40m | -5 / +8 | HA7FT | -17 / -7 | 5 | ✓ Full exchange observed |
| 08-09 20:17 | 40m | -5 / - | LY1DY | -12 / - | 3 | ✓ Closing observed |
| 08-09 20:17 | 40m | - / - | RA6YDX | -15 / - | 5 | Partial capture |
| 08-09 20:16 | 40m | -6 / - | TF4M | - / -15 | 2 | ✓ Closing fragment |
| 08-09 20:14 | 40m | - / - | ON5RZ | -8 / - | 3 | Partial capture |
| 08-09 20:10 | 40m | -10 / - | TF4M | - / -16 | 2 | Partial capture |
| 08-09 20:01 | 40m | - / - | Z34K | -19 / - | 3 | Partial capture |
| 08-02 21:05 | 40m | - / - | SP2FWC | -7 / - | 4 | Partial capture |
| 08-02 21:04 | 40m | - / - | RN6HK | -4 / - | 3 | Partial capture |
| 08-02 20:44 | 40m | - / - | F5PBG | -14 / - | 2 | Partial capture |
| 08-02 20:42 | 40m | - / - | UR5EDX | +1 / - | 7 | Partial capture |
| 08-02 20:41 | 40m | - / -14 | LA0FA | -13 / - | 4 | ✓ Closing fragment |
| 08-02 20:38 | 40m | - / - | RC1C | -20 / - | 2 | Partial capture |
| 08-02 20:32 | 80m | - / - | SP8NR | +12 / - | 2 | Partial capture |
| 08-02 20:29 | 80m | - / - | SP8NR | +4 / - | 2 | Partial capture |
| 08-02 20:18 | 80m | - / - | E77EA | -3 / - | 3 | Partial capture |
| 08-02 20:18 | 80m | - / - | SP8NR | +4 / - | 2 | Partial capture |
| 08-02 20:17 | 80m | -13 / -10 | YO8PS | +10 / - | 3 | ✓ Closing observed |
| 08-02 20:10 | 80m | - / - | IK8WEC | +3 / - | 2 | Partial capture |
| 08-02 20:07 | 80m | - / - | SP2HNF | +20 / - | 3 | Partial capture |
| 08-02 20:07 | 80m | - / - | IK8WEC | +3 / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 203915 +2 984 JR4OZR OK2VCR JN89 (x6) 203800 -15 1048 LX2A JR4OZR -09 (x6) 205600 -6 1608 JR4OZR YL3KZ -16 (x3)
UTC dB Audio Message 202345 -5 384 Z34K JR4OZR RR73 202400 -8 383 JR4OZR Z34K 73 202400 -2 484 JR4OZR RA6YDX LN04 202400 -10 1167 JR4OZR OK2VCR JN89 202430 -6 484 JR4OZR RA6YDX LN04 202430 -11 1167 JR4OZR OK2VCR JN89 202430 -12 385 JR4OZR G6CZC IO94 202500 -2 2796 JR4OZR ON5RZ JO21 204115 -7 2548 CN8NS JR4OZR -06 (x3) 204230 -21 1993 JR4OZR YO6KNZ KN26 204430 -2 599 JR4OZR SP4TKA KO14 200745 -9 750 RI1FJZ JR4OZR PM75 (x2)
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