OK5ARI — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Czech Republic Most frequent locator attributed to this token: JN78

Receiver-side FT8 activity involving OK5ARI, decoded by SO8OO in southeastern Poland. 44 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 11 UTC dates in the available aggregate history. Observed between 2026-07-02 and 2026-09-12.

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 44 FT8 messages attributed to OK5ARI as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (84%), followed by 80 m (9%) and 20 m (7%). Several six-hour UTC windows tied for the largest share (48%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.

Overview

44
Messages attributed
11
UTC dates decoded
12
Active 15-min windows
-16 dB
Estimated median S/N

Bands

80m · 4 40m · 37 20m · 3
First attributed message: 2026-07-02
Last attributed message: 2026-09-12 19:57 UTC

Observed FT8 message patterns

Attributed sample
44 messages
Active dates
11 UTC dates
Estimated median S/N
-16 dB
Estimated 10th-90th percentile
-24 to -11 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 25, moderate (-15 to -9 dB) 16, strong (≥ -8 dB) 3.

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 OK5ARI 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 OK5ARI

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
JN78 · 22 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
518 km (approx.)
Last such locator decoded
2026-09-12 19:57 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 UTCBandOK5ARI S/NCounterpartCounterpart S/NMsgsCapture
09-13 00:03 40m - / -17 KB1EFS -9 / - 7 Partial capture
09-12 23:57 40m - / -18 EC5M -4 / - 2 Partial capture
09-12 19:58 80m - / - DO3PKE +3 / - 5 Partial capture
09-12 19:57 80m - / - DO9BAU +4 / - 13 Partial capture
09-12 19:57 80m - / - EA1IOK -4 / - 2 Partial capture
09-12 19:57 80m - / - R1TAX -2 / - 2 Partial capture
09-12 19:57 80m - / -16 RA2FU +2 / - 2 Partial capture
09-12 19:57 40m - / - DK5AN/P -16 / - 2 Partial capture
09-12 19:57 80m - / - LZ2VQ -1 / - 3 Partial capture
09-12 19:57 80m - / - OK1FED +14 / - 4 Partial capture
09-12 19:56 40m - / - R9FE -4 / - 2 Partial capture
08-31 11:32 20m - / - PD3LKN 0 / - 2 Partial capture
08-31 11:29 20m - / - LA2GCA -1 / - 7 Partial capture
08-31 11:29 20m - / - F5IXN +2 / - 4 Partial capture
08-10 23:32 40m -23 / -5 R2EA -6 / -5 4 ✓ Full exchange observed
08-10 23:28 40m -15 / +4 YO6LM +2 / -12 6 ✓ Full exchange observed
08-10 23:27 40m -12 / +9 IK4LZH -7 / -6 5 ✓ Full exchange observed
08-04 12:43 40m -24 / - E75FM - / -7 2 Partial capture
08-04 12:31 40m -24 / - IZ8PPI - / -7 2 Partial capture
08-04 10:43 40m - / -8 UT4PA -18 / - 3 ✓ Closing fragment
08-04 10:21 20m - / -21 RX3ASQ -18 / - 4 Partial capture
08-04 10:18 20m - / - EA3HMM -1 / - 2 Partial capture
08-03 10:56 20m - / -8 F1PBZ -14 / - 2 ✓ Closing fragment
07-30 03:34 40m -22 / - N0BUZ - / - 2 Partial capture
07-30 03:33 40m -22 / -3 YO9HP -11 / -6 3 ✓ Full exchange observed
07-30 03:29 20m - / -11 YO4NF -10 / - 2 Partial capture
07-16 17:44 40m - / - UA4FKT -12 / - 2 Partial capture
07-16 17:36 40m - / -3 DK7ZT -18 / - 2 Partial capture
07-16 17:35 40m -16 / - DH0GBC - / -5 4 Partial capture
07-13 20:27 40m - / - SP4AVG -16 / - 2 ✓ Closing fragment
07-13 19:54 20m - / - EA3GXK -14 / - 5 Partial capture
07-07 20:12 40m - / -1 ON5LW -11 / - 2 ✓ Closing fragment
07-06 13:22 20m - / - UR4QWW -19 / - 5 Partial capture
07-06 13:18 20m - / +2 CT7AUT -20 / - 2 Partial capture
07-05 20:08 40m -16 / - UF1A -14 / -6 3 ✓ Closing observed
07-04 20:33 20m - / -9 F4HTA -8 / - 2 Partial capture
07-03 20:06 20m - / -17 G8RZ -1 / - 3 Partial capture
07-02 20:42 40m - / - OE6TNO -16 / - 4 Partial capture
06-30 13:26 20m - / -11 DA0WWA -13 / - 6 Partial capture
06-30 11:22 20m - / -17 GJ0KYZ -8 / - 3 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

40m 
UTC    dB Audio  Message
233330 -24 1629  R2EA OK5ARI 73
195600  -5 1984  OK5ARI R9FE LO76 (x2)
195700 -13 1884  OK5ARI DK5AN/P JO54 (x2)
235700  -3  836  OK5ARI EC5M -18 (x2)
000330  -7  880  OK5ARI KB1EFS -17 (x7)
003645  +3 2221  OK5ARI EA3AKY JN01
80m 
UTC    dB Audio  Message
195830  +1 2302  OK5ARI DO9BAU JO62
195830  -4 1253  OK5ARI DO3PKE JO61
195900  +2 2302  OK5ARI DO9BAU JO62
195900  +1 1253  OK5ARI DO3PKE JO61
195930  +1 2302  OK5ARI DO9BAU JO62
195930  +7 1253  OK5ARI DO3PKE JO61
200000  +4 2302  OK5ARI DO9BAU JO62
200000  +7 1253  OK5ARI DO3PKE JO61
200030  +8 2302  OK5ARI DO9BAU JO62 (x7)
20m 
UTC    dB Audio  Message
112900  +0 1271  OK5ARI F5IXN JN23
112915 -11 1271  CQ OK5ARI JN78
112930  +0  959  OK5ARI LA2GCA JO49
112930  -6  914  OK5ARI G8IXM JO02
112930  +3 1271  OK5ARI F5IXN JN23
113000  -7  959  OK5ARI LA2GCA JO49
113000  +4 1271  OK5ARI F5IXN JN23
113030  -1  959  OK5ARI LA2GCA JO49
113030  +2 1271  OK5ARI F5IXN JN23
113100  +4  959  OK5ARI LA2GCA JO49 (x3)
113230  +0 1271  OK5ARI PD3LKN JO22
113230  -2  958  OK5ARI LA2GCA JO49
113300  +0 1271  OK5ARI PD3LKN JO22
10m 
UTC    dB Audio  Message
123830 -14 2490  OK5ARI MI6YHI IO74

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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