JY5JA — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

118 messages

Active dates

6 UTC dates

Estimated median S/N

-7 dB

Estimated 10th-90th percentile

-17 to +4 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 38, strong (≥ -8 dB) 65.

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 JY5JA 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 JY5JA

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

KM71 · 52 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

2,325 km (approx.)

Last such locator decoded

2026-08-08 17:47 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
175115 -18 1975  JY5JA PH7R JO22
175130 -16 1300  OZ6YN JY5JA -16 (x2)
175215  -2 1422  JY5JA RC5F KO85
175230 -18 1420  RC5F JY5JA -08
175245  -2 1422  JY5JA RC5F R+01
175300 -16 1420  RC5F JY5JA RR73
175315 -11 1422  JY5JA RC5F 73
175330 -18 1420  RC5F JY5JA 73
175545  -6  737  JY5JA DL1API JO51 (x4)
220430 -11 2545  JY5JA VE3ARF -02 (x2)

UTC    dB Audio  Message
182230  -3 2371  JY5JA HB9Q -08 (x15)

UTC    dB Audio  Message
161715 -19 1394  JY5JA RK6MC KN97 (x2)
162145 -12  594  JY5JA RW7M KN97 (x2)
162345  -9  508  JY5JA RC6OD R-17 (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.