RT4A/P — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

1,014 messages

Active dates

6 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) 396, moderate (-15 to -9 dB) 314, strong (≥ -8 dB) 304.

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 RT4A/P 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 RT4A/P

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

LO20 · 555 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,646 km (approx.)

Last such locator decoded

2026-09-13 01:16 UTC

Other locator fields attributed to this token: LN28 (18) and LN19 (1).

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
010730 -21 1826  CQ RT4A/P LO20 (x7)
011145 +11 1070  RT4A/P R5DT KO94 (x3)
011430 -18 1826  CQ RT4A/P LO20 (x3)
171030 -14  949  RT4A/P RK6AH KN94 (x2)

UTC    dB Audio  Message
135745  +6 1920  RT4A/P SP2HYO JO93 (x3)
141545 -10 1922  RT4A/P SP2BZ JO83
144115  -2 2105  RT4A/P R2FE KO04 (x2)
144845  +3 2205  RT4A/P SQ3RAX JO82 (x4)
150045  +8 2799  RT4A/P RW3QU R-16 (x3)
153415  +0 2333  RT4A/P LZ2SPD KN22 (x2)

UTC    dB Audio  Message
162145 -10 1300  RT4A/P R9MJ R-06
162200  -8 2031  R9MJ RT4A/P RR73
162215  -8 1300  RT4A/P R9MJ 73
162230  -9 2031  UN7LAN RT4A/P +01 (x2)
162330 -10 2031  CQ RT4A/P LO20
162345 -10 1740  RT4A/P UB3PDB KO93
162345 -15 2031  RT4A/P RV3DBV KO96 (x4)
215445 -20 1881  RT4A/P G8OO JO02 (x4)

UTC    dB Audio  Message
080015  +1 2394  RT4A/P IV3GHY -09 (x2)
080300 -17 2393  CQ RT4A/P LN28
080345  +4 2917  RT4A/P R9CS/P LO75
080345  -3  660  RT4A/P R8FH RR73 (x2)
080430 -18 2393  CQ RT4A/P LN28
080445  +5 2917  RT4A/P R9CS/P LO75
080530 -13 2394  R9CS/P RT4A/P -17
080630 -17 2393  CQ RT4A/P LN28 (x2)
090245 -13 2404  RT4A/P DG1KFR R-08
090300 -15 2134  CQ RT4A/P LN28 (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.