JA9KRO — reception at SO8OO

Observed FT8 message patterns

Attributed sample

269 messages

Active dates

28 UTC dates

Estimated median S/N

-7 dB

Estimated 10th-90th percentile

-13 to +2 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 17, moderate (-15 to -9 dB) 87, strong (≥ -8 dB) 165.

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 JA9KRO 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 JA9KRO

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

PM86 · 87 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

8,497 km (approx.)

Last such locator decoded

2026-08-24 20:40 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
194300  -4 2695  JA9KRO LB7ZG JP50
194315 -19 2176  EA5FD JA9KRO RR73
194330  -3 2695  JA9KRO LB7ZG JP50 (x2)
194415 -18 2176  LB7ZG JA9KRO RR73
194430  -3 2695  JA9KRO LB7ZG 73
194430  -2 2902  JA9KRO F6KUC IN95
194445 -19 2175  F6KUC JA9KRO -13
194500  -4 2901  JA9KRO F6KUC R-09 (x2)
194730 -13 2238  JA9KRO UB6OCP 73
172445  +9  404  JA9KRO 4U1GSC -15 (x3)
115615 -11  840  JA9KRO UA4FKT LO23

UTC    dB Audio  Message
203630  -9  736  G8IXM JA9KRO RR73
203700  -9  736  YU4RBL JA9KRO -03
203700  -2 1432  JA9KRO E77FN JN93
203730 -12  735  YU4RBL JA9KRO RR73
203730  -1 1432  JA9KRO E77FN JN93 (x2)
203815 -13  736  E77FN JA9KRO +08
203830  -2 1432  JA9KRO E77FN R-09
203845 -14  735  E77FN JA9KRO RR73
203900  +5 1432  JA9KRO E77FN 73
204000  -9  735  UA9QFF JA9KRO PM86
220100 -11  576  M0OVG JA9KRO -18
220515  -5  631  JA9KRO M0OVG R-08 (x3)

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.