RT4A/P — reception at SO8OO

Observed FT8 message patterns

Attributed sample

1,059 messages

Active dates

10 UTC dates

Estimated median S/N

-13 dB

Estimated 10th-90th percentile

-22 to +2.9 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 414, moderate (-15 to -9 dB) 329, strong (≥ -8 dB) 316.

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 (20) 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
005230  -3 2605  RT4A/P DL6LAY +18 (x2)
031100 -24 1514  RT4A/P DH1HF R-03 (x4)
035100  +3  696  RT4A/P DL5DQZ R+04
043830 -12 2312  RT4A/P SM0CXS JO99 (x2)
171745 +10 1506  RT4A/P S52D JN76 (x2)
173330  +7 2591  RT4A/P HF5A JO92 (x3)
173500  +5 2591  HF780C RT4A/P 73

UTC    dB Audio  Message
144130 -11 2195  RT4A/P LY3QR KO24
144515  -7 2388  RT4A/P SQ9BDB JO90 (x3)
144615  +4 1363  RT4A/P OK2OM R+10
144645 -10 2387  RT4A/P SQ9BDB JO90
144645  +0 1364  RT4A/P OK2OM R+08
144715  -7 2387  RT4A/P SQ9BDB JO90
144715 +10 1363  RT4A/P OK2OM R+01
144745  -1 2388  RT4A/P SQ9BDB JO90 (x3)
151045  -5 1565  RT4A/P SP6SOZ JO80
120915 -14 1282  RT4A/P EU1AFX KO43 (x2)

UTC    dB Audio  Message
171645  -5 2411  RT4A/P RO7A R-15
171715  +3 2758  RT4A/P RX6LG -12
171715  -8 2411  RT4A/P RO7A R-15
171815  -4 1115  RT4A/P RA7T -16 (x11)
171900 -20 1112  RT4A/P RZ0SW -18

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.