S52DD — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

693 messages

Active dates

10 UTC dates

Estimated median S/N

+2 dB

Estimated 10th-90th percentile

-7 to +9.4 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 53, strong (≥ -8 dB) 635.

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 S52DD 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 S52DD

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

JN75 · 372 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

708 km (approx.)

Last such locator decoded

2026-09-19 18:48 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
175115  -1  283  DA1ST S52DD RR73
175130  +7  282  S52DD DA1ST 73
175145  +6  283  CQ S52DD JN75 (x12)
184815 -12  213  V51WH S52DD JN75

UTC    dB Audio  Message
184015 +14 2742  CQ S52DD JN75
184030  -2 2891  S52DD RO3ZR KO80
184045 +14 2742  RO3ZR S52DD -12
184100  -3 2891  S52DD RO3ZR R-11
184115 +11 2742  RO3ZR S52DD RR73
184130  -6 2891  S52DD RO3ZR 73
184145 +16 2742  CQ S52DD JN75 (x3)
184315  +8 2742  RC5F S52DD -16 (x2)
184415  +5 2742  UR5DU S52DD -04 (x2)
184515  +6 2742  CQ S52DD JN75
184530  +4 2732  S52DD R6DJR -10

UTC    dB Audio  Message
211830 -12 2218  EA8BBJ S52DD JN75 (x3)
212000 -12 2218  UB3BDJ/6 S52DD R-12 (x2)
180615  +2 1190  SP/N1AH S52DD JN75 (x2)
180745  +3 1190  CQ S52DD JN75 (x3)
180915  -3 1190  LY3VD S52DD -19 (x2)
181015  +4 1190  SQ9LOJ S52DD JN75
181045  +3 1190  CQ S52DD JN75 (x2)

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.