JA5NSR — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

154 messages

Active dates

10 UTC dates

Estimated median S/N

-10 dB

Estimated 10th-90th percentile

-15 to -5 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 100, strong (≥ -8 dB) 47.

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 JA5NSR 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 JA5NSR

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

PM73 · 75 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

8,654 km (approx.)

Last such locator decoded

2026-08-26 16:03 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
155000 -10  759  JA5NSR R3KAB -18 (x4)
155130 -12 1207  JA5NSR R3DCA KO85
155200  -4  755  JA5NSR R3KAB -19
155200 -10 1207  JA5NSR R3DCA KO85
155230  -5  755  JA5NSR R3KAB -19
155300  -7 1102  JA5NSR R3DCA KO85
200015  -8  645  JA5NSR EU7SV KO43
201730  +2  847  JA5NSR RG5G -10 (x2)
161700  +9  439  JA5NSR YL3KZ KO16 (x3)

UTC    dB Audio  Message
190100  -9 1918  JA5NSR RY7F LN04 (x3)
190230 +13  600  JA5NSR RC2DD R-20 (x2)
190330  +0  463  JA5NSR UB6OAJ -16 (x3)
204915 -15  436  JA5NSR UB3ANV KO88

UTC    dB Audio  Message
175215  +0  377  JA5NSR M7NTJ JO01
191445  +2 1531  JA5NSR R4FDK LO23 (x2)
191915  +3  546  JA5NSR TA7D KN90 (x3)
184330  -2  629  JA5NSR DL4DTL JN49
181300  +4 1320  JA5NSR SV1AER -02 (x2)
181730  -4  825  JA5NSR TA4DX KM47 (x3)
181900  +9  561  JA5NSR EA3EQS JN01 (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.