9A3J — reception at SO8OO

Observed FT8 message patterns

Attributed sample

1,534 messages

Active dates

33 UTC dates

Estimated median S/N

+5 dB

Estimated 10th-90th percentile

-6.6 to +12 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 91, strong (≥ -8 dB) 1,428.

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 9A3J 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 9A3J

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

JN86 · 1,259 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

521 km (approx.)

Last such locator decoded

2026-11-04 20:22 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
200045  +5  751  9A3J IU8UUF JN70
200300  +8  751  CQ DX 9A3J JN86 (x4)
200445 -14 1444  9A3J DO1WFW JO60
200500  +8  751  CQ DX 9A3J JN86 (x5)
202130  +4  752  EI4KF 9A3J JN86 (x2)
202330  -8  671  9A3J EI5DS -14 (x2)

UTC    dB Audio  Message
073230 -18 1352  9A3J IK2ZJR JN45
073245 -11 1352  CQ DX 9A3J JN86
073300 -14 1352  9A3J IK2ZJR JN45
073315  -9 1352  CQ DX 9A3J JN86 (x4)
073500 -11 1352  9A3J IK2ZJR JN45
073515 -12 1352  CQ DX 9A3J JN86
073530 -13 1352  9A3J OK4SU +28
073530 -17 1263  9A3J LZ2DVD -06
073545  -8 1352  CQ DX 9A3J JN86
073600 -15 1263  9A3J LZ2DVD -06
073730 -17 1353  9A3J DK7JR JO31
062415 -15  787  OA4ENG 9A3J JN86

UTC    dB Audio  Message
105100 -14 1084  9A3J EP2AES -22 (x5)

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.