RA4CPA — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

680 messages

Active dates

26 UTC dates

Estimated median S/N

-8 dB

Estimated 10th-90th percentile

-17 to +2.5 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 108, moderate (-15 to -9 dB) 216, strong (≥ -8 dB) 356.

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 RA4CPA 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 RA4CPA

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

LO38 · 167 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,879 km (approx.)

Last such locator decoded

2026-09-16 16:28 UTC

Other locator fields attributed to this token: LO31 (145).

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
183230 -17 1828  HA3PV RA4CPA LO38
183245  -3 1616  RA4CPA R6FFB LN14
183300 -19 1827  OH5KNL RA4CPA LO38
183315  -4 1616  RA4CPA R6FFB LN14
183315 -20 1961  RA4CPA OH5KNL +06
183330 -13 1828  R6FFB RA4CPA +05
183345  -4 1616  RA4CPA R6FFB R-01 (x2)
183415 -19 1961  RA4CPA OH5KNL +06
183600 -13 1827  OH5KNL RA4CPA LO38
183645 -16 1960  RA4CPA OH5KNL +06 (x2)
163345 -14 1672  RA4CPA RZ6BS KN96 (x3)

UTC    dB Audio  Message
161645  -9 1835  RA4CPA R3PLA KO84 (x3)
161945 -11 1834  RA0SCA RA4CPA LO38
162045 -13 1834  RW4LMR RA4CPA R-25 (x2)
162515  -7 1834  YL3GQ RA4CPA LO38 (x2)
162615  -7 1834  RA0SCA RA4CPA LO38 (x2)
162745 -10 1834  CQ RA4CPA LO38 (x2)
162830  -3 1834  RA4CPA RU3AMO KO85
162845  -4 1834  CQ RA4CPA LO38
162900  -6 1834  RA4CPA RU3AMO KO85

UTC    dB Audio  Message
175945  -5 1871  UA9KBC RA4CPA R-11
180000  +5  433  RA4CPA IK6DLK JN63
180015  -8 1871  UA9KBC RA4CPA 73
180030  +8 2664  RA4CPA RY3D KO95
180045 -11 1871  R2EA RA4CPA LO38
180100  -3  925  RA4CPA R2EA -10
180115  -3 1871  R2EA RA4CPA R-16
180130  -3  925  RA4CPA R2EA RR73
180145  -6 1871  R2EA RA4CPA 73
180230 +11 2664  RA4CPA RY3D KO95
180545  -5 1872  UB0SMX/P RA4CPA LO38 (x2)
180715  +0 1872  OH3DJP RA4CPA LO38 (x3)

UTC    dB Audio  Message
173015 -14 1579  DG2XB RA4CPA 73 (x2)
173245  -5 1578  S59A RA4CPA R-05 (x3)
144900 -13 1582  2E1HAT RA4CPA LO38 (x2)
145030 -12 1581  CQ RA4CPA LO38
145115  -2 1491  RA4CPA G1LQT -10 (x3)
130215  -9 1580  HA1BF RA4CPA LO38 (x4)

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.