YO9CSM — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

271 messages

Active dates

29 UTC dates

Estimated median S/N

+1 dB

Estimated 10th-90th percentile

-8 to +12 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 24, strong (≥ -8 dB) 246.

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 YO9CSM 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 YO9CSM

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

KN23 · 190 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

756 km (approx.)

Last such locator decoded

2026-09-18 04:40 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
155945  +7 2565  S79/DL2SBY YO9CSM KN23 (x2)
041615  +2 2565  YN9H YO9CSM KN23 (x7)
043545  +5 2567  WV5A YO9CSM KN23
043745  +5 2566  9H4JX YO9CSM KN23 (x3)
044000  +5 2566  KD2TDA YO9CSM KN23 (x2)

UTC    dB Audio  Message
045600  -5 2752  EP2AES YO9CSM KN23 (x4)
151215  -8 2804  <...> YO9CSM KN23
151415 -11 2750  XU7O YO9CSM KN23 (x2)
044130 -13 2515  TI2FAF YO9CSM KN23 (x2)
045015  -2 2653  7Q7CT YO9CSM KN23
045515  +0 2627  VK1NC YO9CSM KN23 (x2)
045830 -16 2627  ZL2KR YO9CSM 73
050215  -3 2627  <...> YO9CSM KN23 (x2)

UTC    dB Audio  Message
043745  -2 2635  <...> YO9CSM KN23
043800  -1 2433  YO9CSM YO1BRANCUSI +00
043815  -5 2635  <...> YO9CSM R+03
040845  +0 1503  YO9CSM YO5EEE +01
040900  +9 2730  YO5EEE YO9CSM R+03
040915  -3 1503  YO9CSM YO5EEE RR73
040930 +12 2730  YO5EEE YO9CSM 73
040945  +6 2732  YO9CSM DK1MCS JN57 (x2)
041030  +9 2730  DK1MCS YO9CSM RR73
041045 +10 2732  YO9CSM DK1MCS 73

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.