SP8XXX — reception at SO8OO

Observed FT8 message patterns

Attributed sample

400 messages

Active dates

17 UTC dates

Estimated median S/N

-2 dB

Estimated 10th-90th percentile

-7 to +13 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 15, strong (≥ -8 dB) 381.

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 SP8XXX 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 SP8XXX

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

KN19 · 209 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

100 km (approx.)

Last such locator decoded

2026-09-26 15:25 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
174530  -5 1805  YO4LUP SP8XXX RR73 (x2)
174615  -4 1804  SP8XXX DO9SAM JO61
174615  -8  880  SP8XXX DK7UY JO44
174630  -3 1805  YO4LUP SP8XXX RR73
174645  +2 1805  SP8XXX DO9SAM JO61
174645  +0 2502  SP8XXX DO9BAU JO62
174645  -8  880  SP8XXX DK7UY JO44
174700  -6 1805  DO9SAM SP8XXX -10
174715  -5 1804  SP8XXX DO9SAM R-04
174730  -9 1805  DO9SAM SP8XXX RR73
174745  -6 1804  SP8XXX DO9SAM 73
174745  -1 2502  SP8XXX DO9BAU JO62
174830 -13 1804  DO9BAU SP8XXX -11 (x2)

UTC    dB Audio  Message
171330  -7  599  SP8XXX TN8GD -13
053700  -4 2555  SP8XXX TM84TFR -11
155600  +7 1131  SP8XXX UN7GBX R-20 (x2)
155630  -5 1230  SP8XXX F5PBG IN78 (x4)

UTC    dB Audio  Message
173945 -18 1097  SP8XXX S55A R-14
174145 -13 1197  SP8XXX CS7BMX 73
174815 -20 1399  SP8XXX CS7AFM RRR
175415 -10 1008  SP8XXX OD5ET R-22

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.