OK1ZJK — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

5,979 messages

Active dates

35 UTC dates

Estimated median S/N

-4 dB

Estimated 10th-90th percentile

-16 to +10 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 686, moderate (-15 to -9 dB) 1,260, strong (≥ -8 dB) 4,033.

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 OK1ZJK 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 OK1ZJK

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

JN79 · 4,824 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

491 km (approx.)

Last such locator decoded

2026-09-19 08:23 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.

Recent FT8 messages decoded at SO8OO

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

UTC    dB Audio  Message
081615 +12  533  CQ OK1ZJK JN79 (x4)
081815 +12  534  F8CKS OK1ZJK -06 (x3)
081945  +5  533  CQ OK1ZJK JN79 (x8)

UTC    dB Audio  Message
213300 -15 2001  OK1AR OK1ZJK 73
213630 -23 2000  CQ OK1ZJK JN79                        a1 (x2)
221115  +8  496  OK1ZJK UR3QCB KN77
221130 +16  497  CQ OK1ZJK JN79
221145  +6  496  OK1ZJK UR3QCB KN77
221145 -10 2173  OK1ZJK GX4RAF/P IO91
221200 +23  497  UF6V/UA5D OK1ZJK -16
221215 -12 2173  OK1ZJK GX4RAF/P R+01
221230 +15  497  UF6V/UA5D OK1ZJK RR73
221245 -12 2173  OK1ZJK GX4RAF/P 73
221300  +8  496  UF6V/UA5D OK1ZJK 73
221330  +6  497  CQ OK1ZJK
221345 -13 1502  OK1ZJK ON4MAP JO20
221400 +10  497  CQ OK1ZJK JN79

UTC    dB Audio  Message
221445 -11 1618  OK1ZJK CT1BFP IM59 (x4)
221715 -15 1769  OK1ZJK VE3NVK R-16 (x2)
192315  +4 1884  OK1ZJK AO5FSB -03 (x2)
192845  +1 2641  OK1ZJK YO3RU +07 (x3)
193045  -6 1418  OK1ZJK LZ6C -10 (x4)

UTC    dB Audio  Message
080245  -7 2016  OK1ZJK F5MYH 73
080430 -10  590  SQ5EXI OK1ZJK 73
080530 -11  590  CQ OK1ZJK JN79
092845  -7  591  OK1ZJK IU3UQW JN55 (x3)
093115  -9 2331  OK1ZJK IZ2FOS JN55 (x3)
093915  +1 2635  OK1ZJK F1PBZ -07 (x2)
094715  -6  575  OK1ZJK IU2THY JN45 (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.