DJ4JZ — reception at SO8OO

Observed FT8 message patterns

Attributed sample

481 messages

Active dates

17 UTC dates

Estimated median S/N

-1 dB

Estimated 10th-90th percentile

-17 to +8 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 57, moderate (-15 to -9 dB) 47, strong (≥ -8 dB) 377.

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 DJ4JZ 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 DJ4JZ

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

JO30 · 309 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,053 km (approx.)

Last such locator decoded

2026-10-09 00:34 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
002715 +17  536  9T0MD DJ4JZ JO30 (x11)
003800 -16 1059  DJ4JZ 8Q7PR -06
003815 +14 2384  8Q7PR DJ4JZ R-04 (x3)

UTC    dB Audio  Message
201230  +8 2739  OH6FSO DJ4JZ JO30
201515 +25  346  DJ4JZ DF7EF +05
201545  -4 2389  DF7EF DJ4JZ JO30
201545 +21  346  DJ4JZ DF7EF +05
201615  +5 2389  DF7EF DJ4JZ JO30
201615 +18  346  DJ4JZ DF7EF +05
201645  -5 2389  DF7EF DJ4JZ JO30
201645 +18  346  DJ4JZ DF7EF +05
201715  +1 2389  DF7EF DJ4JZ JO30
201715 +27  346  DJ4JZ DF7EF +05
201745  +7 2389  DF7EF DJ4JZ JO30
201745 +20  346  DJ4JZ DF7EF +05
201815  -9 2389  DF7EF DJ4JZ JO30
201815 +20  346  DJ4JZ DF7EF +05 (x2)

UTC    dB Audio  Message
203130 -12 1772  SP7TF DJ4JZ 73
203145  +4 2692  DJ4JZ OE9GWV JN47
203200  -9 1772  CQ DJ4JZ JO30
203215  +3 2692  DJ4JZ OE9GWV JN47 (x2)
203300  -3 1772  CQ DJ4JZ JO30
203315  +5 2692  DJ4JZ OE9GWV JN47
203330  -2 1772  IU5VLR DJ4JZ -15
203345  +5 2692  DJ4JZ OE9GWV JN47
203345  -8 1772  DJ4JZ 4O4DB JN92
203400  -6 1772  IU5VLR DJ4JZ -15
203415  -9 1537  DJ4JZ IU5VLR R-12
203415  -9 1772  DJ4JZ 4O4DB JN92 (x2)
203500  -7 1772  IU5VLR DJ4JZ -15

UTC    dB Audio  Message
183130 -15 1712  EU6AX DJ4JZ JO30
183145 -15 2054  DJ4JZ EU6AX -06
183200 -18 1712  EU6AX DJ4JZ R+07 (x2)
183300 -18 1711  DB4SNK DJ4JZ JO30
183315  +9  578  DJ4JZ DB4SNK -19
183330 -19 1712  DB4SNK DJ4JZ R-10
183345  +2  578  DJ4JZ DB4SNK RR73
183400 -14 1712  DB4SNK DJ4JZ 73
183500 -20 1712  R1BDX DJ4JZ -06 (x2)
183815 -21 1712  UB4LAN DJ4JZ JO30 (x4)

UTC    dB Audio  Message
205115 -14 2390  CQ DJ4JZ JO30                         a1

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.