RD1A — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

913 messages

Active dates

11 UTC dates

Estimated median S/N

-13.9 dB

Estimated 10th-90th percentile

-21 to -5.3 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 340, moderate (-15 to -9 dB) 405, strong (≥ -8 dB) 168.

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 RD1A 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 RD1A

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

KO59 · 611 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,214 km (approx.)

Last such locator decoded

2026-09-07 03:19 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
030845 -18 2017  CQ RD1A KO59 (x15)

UTC    dB Audio  Message
061245  +4 1276  RD1A OK2QP R-13
061445  +0 1243  RD1A SQ3IOE R-07 (x2)
061630 -15 1164  CQ RD1A KO59
063915 -11 1165  RD1A OE6TNO JN77 (x4)
064200 -21 1163  CQ RD1A KO59                          a1
064315  +9 2845  RD1A S56EPX R-13 (x3)
064700 -11 1164  CQ RD1A KO59 (x3)

UTC    dB Audio  Message
025900  -9 1199  CQ RD1A KO59 (x10)
030600  -3 1199  DB5GSS RD1A -22 (x2)
030645  -5 1044  RD1A DB5GSS R+07
030700  -6 1199  CQ RD1A KO59 (x2)

UTC    dB Audio  Message
062245 +10 2738  DK5EI RD1A -08 (x2)
062345 +11 2738  CQ RD1A KO59
062415 +10 2738  DK5EI RD1A RR73
062445  +9 2738  RX9UCF RD1A -14 (x2)
062615 +10 2738  EA3PV RD1A -18
062630 -12 2737  RD1A EA3PV R-21
062645  +9 2738  EA3PV RD1A RR73 (x2)
062800 -11 2737  RD1A EA3PV R-21
062815 +15 2738  RC8SAB RD1A -16 (x2)
062915 +10 2737  CQ RD1A KO59
062945 +10 2738  R4HLG RD1A +00

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.