AC1JS — reception at SO8OO

Observed FT8 message patterns

Attributed sample

242 messages

Active dates

3 UTC dates

Estimated median S/N

-13 dB

Estimated 10th-90th percentile

-21 to -6 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 88, moderate (-15 to -9 dB) 89, 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 AC1JS 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 AC1JS

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

FN54 · 84 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

6,448 km (approx.)

Last such locator decoded

2026-11-03 04:27 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
044515  +9  502  AC1JS ES2MC R-10 (x2)
044600 -12  708  KQ4CRY AC1JS -01
044715  +4 2134  AC1JS 9A5E JN75
044730 -13  707  KD3BLX AC1JS R+05
044745  +1 2134  AC1JS 9A5E JN75 (x3)
044900 -14  708  9A5E AC1JS RRR
044915  -1 2134  AC1JS 9A5E 73
045045  -6 2443  AC1JS SP3SLA -02
045100 -21  708  SP3SLA AC1JS R+00
045115  -4 2443  AC1JS SP3SLA RR73
045130 -12  708  SP3SLA AC1JS 73
045430 -23 1300  AC1JS DO1NAE 73

UTC    dB Audio  Message
041045  +8 1600  AC1JS SP5EXA KO02 (x3)
015630 -12 1035  AC1JS F4UJU JN06 (x7)
024015  +2 1931  AC1JS DK7ZT JO40 (x5)

UTC    dB Audio  Message
215515  -6  828  AC1JS M8KUG IO81 (x10)
234130 -18 1214  AC1JS 9K2YM -23 (x4)
235945 -14 2610  VU2SW AC1JS FN54

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.