K1ZJA — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving K1ZJA, decoded by SO8OO in southeastern Poland. 54 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-09-13.
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 54 FT8 messages attributed to K1ZJA as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (89%), followed by 80 m (9%) and 20 m (2%). Several six-hour UTC windows tied for the largest share (98%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.
Overview
Bands
Last attributed message: 2026-09-13 00:14 UTC
Observed FT8 message patterns
- Attributed sample
- 54 messages
- Active dates
- 7 UTC dates
- Estimated median S/N
- -10 dB
- Estimated 10th-90th percentile
- -15 to -4 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 29, strong (≥ -8 dB) 21.
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 K1ZJA 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 K1ZJA
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
- EM85 · 29 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 7,995 km (approx.)
- Last such locator decoded
- 2026-09-13 00:14 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 | K1ZJA S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-13 09:20 | 40m | - / - | F5NBU | +1 / - | 3 | Partial capture |
| 09-13 00:14 | 80m | -16 / -15 | 7X5CY | -13 / - | 3 | ✓ Closing observed |
| 09-12 08:42 | 40m | - / - | F4BYA | -4 / - | 2 | Partial capture |
| 09-10 23:25 | 80m | - / -15 | EA1AUO | -22 / - | 4 | Partial capture |
| 09-10 23:24 | 80m | - / -16 | DK7ZT | +9 / - | 3 | ✓ Closing fragment |
| 09-08 23:46 | 80m | - / - | F5RRS | 0 / - | 4 | Partial capture |
| 09-08 23:44 | 80m | - / -23 | Z62NS | +12 / - | 5 | ✓ Closing fragment |
| 09-08 23:19 | 80m | - / -14 | PI4DX | +5 / - | 2 | ✓ Closing fragment |
| 09-07 23:14 | 40m | -16 / - | V51PJ | - / - | 3 | Partial capture |
| 09-07 23:14 | 40m | - / - | YE4FNN | -10 / - | 2 | Partial capture |
| 09-07 23:13 | 40m | - / - | CT7ARQ | -20 / - | 4 | Partial capture |
| 09-07 23:13 | 40m | - / - | I1WXY | -1 / - | 2 | Partial capture |
| 09-07 23:11 | 40m | - / - | SV1HFE | -2 / - | 7 | Partial capture |
| 09-07 23:09 | 40m | -5 / -9 | EG5PDA | -6 / -19 | 5 | ✓ Full exchange observed |
| 09-07 23:08 | 40m | - / - | RM6OM | -12 / - | 2 | Partial capture |
| 09-07 23:07 | 40m | -9 / - | N9VKV | - / -15 | 2 | ✓ Closing fragment |
| 09-07 23:07 | 40m | - / -16 | F1PBZ | +2 / - | 4 | Partial capture |
| 09-07 23:07 | 40m | - / - | F4BYA | +14 / - | 4 | Partial capture |
| 09-07 23:05 | 40m | -8 / - | KG4OVU | - / +5 | 2 | ✓ Closing fragment |
| 09-07 22:58 | 40m | -14 / - | A61DD | - / - | 2 | Partial capture |
| 09-07 22:48 | 40m | - / -13 | I2SDD | -12 / - | 2 | Partial capture |
| 09-07 22:47 | 40m | -14 / - | KA0BWH | - / - | 2 | ✓ Closing fragment |
| 09-07 22:46 | 40m | -13 / - | W4PPT | - / -2 | 2 | ✓ Closing fragment |
| 09-07 22:45 | 40m | - / - | CT7ARQ | -18 / - | 7 | Partial capture |
| 09-07 22:45 | 40m | -12 / -10 | IK2XDE | +10 / -12 | 5 | ✓ Full exchange observed |
| 09-07 22:45 | 40m | - / - | PE1NPS | +5 / - | 4 | Partial capture |
| 09-06 00:19 | 40m | - / -2 | OU7M/P | +5 / - | 2 | ✓ Closing fragment |
| 09-03 09:09 | 40m | - / - | PD4RD | -3 / - | 10 | Partial capture |
| 08-30 00:15 | 40m | -10 / -17 | YO4NF | -17 / - | 2 | Partial capture |
| 08-30 00:13 | 40m | -13 / -17 | PT7RF | -16 / -13 | 4 | ✓ Full exchange observed |
| 08-30 00:09 | 40m | - / - | IU8UHK | -5 / - | 3 | Partial capture |
| 08-30 00:09 | 40m | - / - | EA5HM | -11 / - | 5 | Partial capture |
| 08-30 00:08 | 40m | - / - | MI7XHT | -19 / - | 2 | Partial capture |
| 08-30 00:08 | 40m | -6 / - | VA2WMA | - / -16 | 2 | Partial capture |
| 08-30 00:06 | 40m | -12 / -7 | EC5M | -8 / -8 | 5 | ✓ Full exchange observed |
| 08-30 00:04 | 40m | -4 / - | WD8AWW | - / -13 | 2 | ✓ Closing fragment |
| 08-30 00:04 | 40m | - / - | 2E0ROJ | 0 / - | 2 | Partial capture |
| 08-29 23:34 | 40m | -8 / - | CX9AU | - / -13 | 3 | ✓ Closing fragment |
| 08-29 23:30 | 40m | - / - | SV1MOZ | -3 / - | 4 | Partial capture |
| 08-29 23:29 | 40m | - / -16 | <...> | +2 / - | 2 | Partial capture |
| 08-29 23:29 | 40m | -12 / - | LX1FP | -7 / - | 2 | ✓ Closing observed |
| 08-28 08:40 | 20m | - / -15 | AO5FSB | -16 / - | 2 | ✓ Closing fragment |
| 08-25 00:38 | 40m | - / -16 | R2BQM | +6 / - | 5 | Partial capture |
| 08-23 23:59 | 40m | - / - | DL9KM | -16 / - | 2 | Partial capture |
| 08-10 23:07 | 20m | - / +5 | IW8CGX | -16 / - | 2 | Partial capture |
| 08-03 00:55 | 80m | - / -11 | DK2FM | +16 / - | 3 | Partial capture |
| 08-03 00:55 | 80m | - / - | UA3PY | -1 / - | 2 | Partial capture |
| 08-03 00:52 | 80m | -7 / - | TI2CC | - / -6 | 4 | ✓ Closing fragment |
| 08-01 23:29 | 40m | - / - | G5TV | -19 / - | 4 | Partial capture |
| 07-26 23:17 | 40m | - / -11 | IZ8EYN | -8 / - | 5 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 231415 +1 2836 K1ZJA SV1HFE KM18 231415 -18 1479 K1ZJA CT7ARQ IN51 231445 -9 2010 K1ZJA YE4FNN OI37 231445 -15 1103 V51PJ K1ZJA EM85 231445 +0 2836 K1ZJA SV1HFE KM18 231515 -16 1104 V51PJ K1ZJA EM85 231515 -20 1480 K1ZJA CT7ARQ IN51 231545 -10 2010 K1ZJA YE4FNN OI37 231545 -18 1103 V51PJ K1ZJA EM85 231545 -21 1479 K1ZJA CT7ARQ IN51 084200 -5 2981 K1ZJA F4BYA JN19 (x2) 092015 +2 644 K1ZJA F5NBU JN28 (x3)
UTC dB Audio Message 234600 +11 914 K1ZJA Z62NS RR73 234630 -2 1886 K1ZJA F5RRS JN36 (x4) 232400 +17 1112 K1ZJA DK7ZT -16 (x3) 232530 -24 1805 K1ZJA EA1AUO -15 (x4) 001445 -16 563 7X5CY K1ZJA EM85 001600 -12 564 K1ZJA 7X5CY -15 (x2)
UTC dB Audio Message 231130 -4 1084 K1ZJA 9K2YM -13 (x2) 233100 -14 871 K1ZJA F6FDY 73 233200 -4 828 K1ZJA UT7UJ -19 (x6) 230630 -9 398 K1ZJA 7X5CY -07 230415 -18 1016 K1ZJA IW8CGX +02 (x3) 084000 -15 732 K1ZJA AO5FSB -15 (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.
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