Z31RQ — reception at SO8OO

Observed FT8 message patterns

Attributed sample

350 messages

Active dates

8 UTC dates

Estimated median S/N

-12 dB

Estimated 10th-90th percentile

-19 to -5 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 91, moderate (-15 to -9 dB) 157, strong (≥ -8 dB) 102.

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 Z31RQ 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 Z31RQ

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

KN01 · 193 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

940 km (approx.)

Last such locator decoded

2026-10-05 22:54 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
225045  -7 2981  YO4NF Z31RQ R+18
225145  -4 2981  CQ Z31RQ KN01
225200 -10 1642  Z31RQ IS0CAK -03
225215  -5 2981  CQ Z31RQ KN01
225230 +10 2982  Z31RQ YO4NF -05
225230 -14 1642  Z31RQ IS0CAK -02
225245  -3 2981  IS0CAK Z31RQ R+09
225300  -7 1642  Z31RQ IS0CAK RR73
225315  -2 2981  IS0CAK Z31RQ 73
225345  -9 2981  CQ Z31RQ KN01                         a1 (x2)
225430  -4  437  Z31RQ DH4PAP JO30 (x4)

UTC    dB Audio  Message
002900  -4 1159  PY5XH Z31RQ R-26 (x8)
003400 -10 1159  CQ Z31RQ KN01
003415  -3 1346  Z31RQ RM5F KO85
003415 -19 2122  Z31RQ OH2BGD KP20
003445 -12 1159  CX6VM Z31RQ RRR
003515  -2 2122  Z31RQ OH2BGD KP20
003515 -11 1159  CX6VM Z31RQ KN01
003615  -8 2122  Z31RQ OH2BGD KP20

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.