SP2ALT — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

191 messages

Active dates

2 UTC dates

Estimated median S/N

-10 dB

Estimated 10th-90th percentile

-18 to -3 dB

Recurring-pattern threshold

Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 47, moderate (-15 to -9 dB) 59, strong (≥ -8 dB) 85.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with SP2ALT 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 SP2ALT

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

JO83 · 161 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

515 km (approx.)

Last such locator decoded

2026-09-06 08:56 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
083815  -9 1616  SP2ALT SQ6EMJ JO80 (x3)
084200 -17 1234  CQ SP2ALT JO83 (x3)
084315  +4 1234  SP2ALT UT4PA KO20
084430 -22 1234  CQ SP2ALT JO83                        a1 (x3)
100600 -16 1281  SP2ALT SO100PKP -13
100630 -12 1281  SP2ALT RR73; DL4MBY <...> -10
100800 -11 1668  SP2ALT SN100PKP -06 (x2)
100845 -24 1433  G4BWQ/P SP2ALT R-08

UTC    dB Audio  Message
065530 -15 1201  CQ SP2ALT JO83 (x15)

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.