S58Z — reception at SO8OO

Observed FT8 message patterns

Attributed sample

1,462 messages

Active dates

57 UTC dates

Estimated median S/N

0 dB

Estimated 10th-90th percentile

-14.8 to +9 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 115, moderate (-15 to -9 dB) 228, strong (≥ -8 dB) 1,119.

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 S58Z 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 S58Z

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 · 629 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

631 km (approx.)

Last such locator decoded

2026-10-20 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
214315  -9  383  CQ S58Z JN76
184230  +1 2997  N9WCW S58Z -03 (x4)
184430  +5 2998  CQ S58Z JN76 (x5)
184830  +6 2997  S58Z M5RJC IO93
184845  +0 2997  M5RJC S58Z +03
184900  +4 2997  S58Z M5RJC R+14
184915  +3 2997  M5RJC S58Z RR73
184930  +6 2997  S58Z M5RJC 73

UTC    dB Audio  Message
191700  -1 2876  S58Z OE5PEN JN78
191715 +17 2876  OE5PEN S58Z +06
191730  +5 2876  S58Z OE5PEN R+06
191745 +12 2876  OE5PEN S58Z RR73
191800  +7 2876  S58Z OE5PEN 73
191915 +19 2876  RK6OQ S58Z +09
202445  +5  263  CQ S58Z JN76
202500  -9  565  S58Z DK8HC JO42 (x3)
215245  +3 2659  RN1NEB S58Z R-10
215300 -10 1932  S58Z RN1NEB RR73
215315  +4 2660  RN1NEB S58Z 73
215630 +12 2957  UB7K S58Z JN76 (x2)

UTC    dB Audio  Message
203615  +0  665  S58Z G4ZFJ JO01
203615 -15 2454  S58Z DK5WO 73
203645  +0  665  S58Z G4ZFJ JO01 (x3)
203745 -18 1900  S58Z DK7ZT +02 (x3)
204045  +7 2134  S58Z SP9UPH -12 (x2)
213515  -3  921  S58Z DA0O JO30 (x5)

UTC    dB Audio  Message
204545  +5 3042  CQ S58Z JN76 (x2)
204715  +2 3042  WD4GBW S58Z +03 (x2)
204815  +4 3042  CQ S58Z JN76 (x3)
204930  -9 3042  S58Z G4WJJ IO80
204945  -1 3042  G4WJJ S58Z -09
205000  -8 3042  S58Z G4WJJ IO80
205015  -1 3042  G4WJJ S58Z -09
205030  -9 3042  S58Z G4WJJ IO80
205045  -3 3043  G4WJJ S58Z -16
205100  -5 3042  S58Z G4WJJ IO80 (x2)

UTC    dB Audio  Message
224000  -6 1284  S58Z OK1DXR JO60 (x3)
224100  +1 2694  S58Z 9A4ZM JN86 (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.