S51RU — reception at SO8OO

Observed FT8 message patterns

Attributed sample

587 messages

Active dates

62 UTC dates

Estimated median S/N

-5 dB

Estimated 10th-90th percentile

-17 to +3 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 79, moderate (-15 to -9 dB) 129, strong (≥ -8 dB) 379.

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 S51RU 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 S51RU

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

JN76 · 404 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

631 km (approx.)

Last such locator decoded

2026-10-26 05:55 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
153645  -4 2006  IK3/UY7LA S51RU JN76 (x2)
042815 -16 1687  S51RU EA3IAZ RR73 (x6)
054700 -13 2008  W8FIB S51RU JN76 (x7)

UTC    dB Audio  Message
042615  +2 2382  S51RU DL1GLO JN47
042630 -24 1973  DL1GLO S51RU -15 (x2)
042900  -1 1973  HB9IRO S51RU JN76
043145  +0 1975  S51RU LZ2VQ -06 (x3)
051300  -5 1353  S51RU ON3MOH/P -08
051315  -1 1873  ON3MOH/P S51RU R-02
051330  -7 1353  S51RU ON3MOH/P RR73
051415  -6 1873  ON3MOH/P S51RU JN76 (x2)
042400  +2 2001  R9CS/P S51RU JN76 (x2)
042515  -8 1225  S51RU DB100FT -05

UTC    dB Audio  Message
035030 +14  282  S51RU PA4PA RR73
035130 -16 1093  S51RU F4LTX IN95 (x2)
040815 -21 2062  W1IE S51RU JN76
041130 -11 1063  S51RU K1QD -17
043400  -8 2003  VE3FF S51RU JN76 (x2)
043545 -17 2004  S51RU VE3FF -18 (x2)
045815  -7 1903  9H6C S51RU JN76 (x6)

UTC    dB Audio  Message
034930 -20 1967  OK1TP S51RU JN76
034945  +7 1822  S51RU OK1TP -15
035000 -18 1967  OK1TP S51RU R-01
035015  +9 1822  S51RU OK1TP RR73
035030 -20 1967  OK1TP S51RU 73
035045  +7 1296  S51RU OK1DXR JO60
035100 -19 1967  OK1DXR S51RU +06
035145  +5 1295  S51RU OK1DXR 73

UTC    dB Audio  Message
104245 -14 2038  R50RKZ S51RU R-04
104300  -9  927  S51RU R50RKZ RR73
035130 -19 2037  NE9U S51RU JN76 (x7)
035500  +7 1036  AA4SS S51RU JN76
035530  +8 1036  NE9U S51RU R-10 (x2)
035915  -2 1036  K0ARM S51RU JN76 (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.