JA7YAA — reception at SO8OO

Observed FT8 message patterns

Attributed sample

9 messages

Active dates

2 UTC dates

Estimated median S/N

-17 dB

S/N percentile sample

Too small

Recurring-pattern threshold

Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 0.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with JA7YAA in decoded directed-looking exchanges:

Most frequent locator attributed to JA7YAA

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

QM08 · 2 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

8,525 km (approx.)

Last such locator decoded

2026-09-18 20:02 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
190000 -17 1847  JA7YAA UR5EDX 73
190000  -7 2685  JA7YAA G4DBW JO01
200145  -3 2184  JA7YAA 9A3TGT JN85 (x2)
150230  +1 2734  JA7YAA UA1WFH KO46 (x2)
150400  +0 2438  JA7YAA RA3ZH KO81
150430 +13  297  JA7YAA SQ3F JO81
150430  -5 2438  JA7YAA RA3ZH KO81
150500 +11  297  JA7YAA SQ3F JO81
150500  -1 2438  JA7YAA RA3ZH R-07
150600 -10 2437  JA7YAA UA6CP KN96
150600  +9  618  JA7YAA SQ3F JO81 (x3)

UTC    dB Audio  Message
183715  -1 1989  JA7YAA R3RB LO03
192445  +1 2548  JA7YAA RO2X KO74 (x14)

UTC    dB Audio  Message
200515 +14  358  JA7YAA UW5ZM KN57 (x6)

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.