RC3C — reception at SO8OO

Observed FT8 message patterns

Attributed sample

310 messages

Active dates

9 UTC dates

Estimated median S/N

-13 dB

Estimated 10th-90th percentile

-22 to -3 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 101, moderate (-15 to -9 dB) 117, strong (≥ -8 dB) 92.

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 RC3C 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 RC3C

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

KO85 · 162 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,193 km (approx.)

Last such locator decoded

2026-10-07 14:51 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
144230 -14  946  RV9WJP RC3C RR73
144300 -14  946  KD6WW RC3C KO85 (x3)
144415 -17  946  RC3C G7EVY IO83
144530  -8  847  KD6WW RC3C KO85 (x2)
144630 -18  847  CQ RC3C KO85                          a1 (x3)
144815 -20 1463  RC3C UA9SAV R-03
144830 -15  847  UA9SAV RC3C RR73
145000 -14  847  CQ RC3C KO85                          a1 (x2)
145130 -18  847  R0SAU RC3C R-06

UTC    dB Audio  Message
195415 -16 1810  RC3C RA6ANN KN95
195415  -1 2253  RC3C R3BDQ -02
195415  +0  839  RC3C DO4SO -18
195445 -11 1809  RC3C RA6ANN KN95
195445  +8  839  RC3C DO4SO -18
195500  -8  838  RA6ANN RC3C -15
195515  +9  839  RC3C DO4SO 73
195545 -18 1809  RC3C RA6ANN R-09
195600 -12  838  RA6ANN RC3C RR73
200000 -23  234  RC3C RJ3T LO26 (x6)

UTC    dB Audio  Message
181600 -12 1688  RC3C ER1CW -18 (x2)

UTC    dB Audio  Message
133045  +1 2076  RC3C SV5BYP KM46
133100 -23 1077  ON9MD RC3C -07
133715 -11  354  RC3C F4HCE JN29 (x2)
134115  +2 2076  RC3C SV5BYP KM46 (x2)
134145 +15 1016  RC3C PI4DX +17 (x2)
134245  -1 2076  RC3C SV5BYP KM46 (x2)
134545 -13 1935  RC3C LX7I +05 (x2)
175100 -21 2139  RC3C G4DBW JO01 (x3)

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.