SM5K — reception at SO8OO

Observed FT8 message patterns

Attributed sample

291 messages

Active dates

29 UTC dates

Estimated median S/N

-6 dB

Estimated 10th-90th percentile

-20 to +4 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 55, moderate (-15 to -9 dB) 52, strong (≥ -8 dB) 184.

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 SM5K 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 SM5K

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

JO89 · 249 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,106 km (approx.)

Last such locator decoded

2026-10-22 18:08 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
180100 -24  202  BD8CS SM5K JO89 (x5)
180315 -14 2547  SM5K BD8CS -06
180430 -24  202  BD8CS SM5K JO89 (x7)

UTC    dB Audio  Message
174045  -3  226  SM5K F8MRQ JN17 (x2)
174130  -5  223  F8MRQ SM5K -01
174145  +4  226  SM5K F8MRQ JN17
174200  -6  223  F8MRQ SM5K +03
174215  +6  225  SM5K F8MRQ R+00 (x3)
174330  -4  223  F8MRQ SM5K RR73
174345  -1  225  SM5K F8MRQ 73
174415  -4  235  SM5K F5PBG IN78
174430  -3  223  F5PBG SM5K +01
174445  -3  235  SM5K F5PBG R-06
174500  -3  223  F5PBG SM5K RR73
174515  -9  235  SM5K F5PBG 73

UTC    dB Audio  Message
191515  +9 2792  OJ0JR SM5K JO89 (x3)
191630  +6  378  SM5K RR73; EA1AT <...> -02
173930 -14 1469  GM3POI SM5K JO89 (x2)
173630  +0  441  ER1CW SM5K JO89
173645  -9 1720  SM5K ER1CW -06
173700  -2  440  ER1CW SM5K R-11
173715  -7 1720  SM5K ER1CW RR73
173730  -2  440  ER1CW SM5K R-11 (x5)

UTC    dB Audio  Message
042045 -10 1421  PJ4/DH8BQA SM5K JO89 (x11)
052215 -24 1422  <PJ2/W4IPC> SM5K JO89
052830 -12 1131  SM5K PJ2/W4IPC -15
052930  -6 1678  SM5K F4FSY -06 (x2)

UTC    dB Audio  Message
075545  -4  330  D2UY SM5K R-13 (x2)
075700  -9 1860  SM5K F4FSY +01
180415  +0  345  SM5K EA3HMM JN00 (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.