RZ5D — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

1,916 messages

Active dates

93 UTC dates

Estimated median S/N

-9.8 dB

Estimated 10th-90th percentile

-18 to -1 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 319, moderate (-15 to -9 dB) 763, strong (≥ -8 dB) 834.

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 RZ5D 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 RZ5D

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

KN75 · 869 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,102 km (approx.)

Last such locator decoded

2026-10-03 21:05 UTC

Other locator fields attributed to this token: JN65 (5).

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
201230  +1 2228  RZ5D R4RZ -21 (x3)
175645  -2  384  RZ5D UA3QGT -14 (x2)
061600  +6  951  RZ5D LZ3CB KN32 (x3)
184330  -6  976  R4HOH RZ5D R-10 (x3)
181600 -11  385  RZ5D US1EA KN78 (x4)

UTC    dB Audio  Message
182615  +3 1757  RZ5D R2SN -16 (x2)
183900 -17 2197  RO2E/M RZ5D -22
192600 -18 2114  DL80NRW RZ5D -22
193915 -11 1292  R4AGE RZ5D RR73 (x3)
210600 -17 1222  RZ5D R6KEE R-21 (x2)
144430 -14 1609  RZ5D RO2E/P R-14
154300 -24 1133  R80SAA RZ5D -19
163845 -24 2491  RO2E/M RZ5D -19 (x2)
163930 -13 2849  RZ5D RO2E/M R-14 (x2)

UTC    dB Audio  Message
200445 -13 1330  RI1FJZ RZ5D -10 (x6)
185515 -14  422  RZ5D R7KCK -17 (x2)
204500 -10 1284  RZ5D R6DAZ -20 (x2)
214615 -18 2388  EK/RX3DPK RZ5D KN75 (x2)
205245 -19 1454  RZ5D RA3RDN R-20 (x2)
210500 -24 1854  RM5P RZ5D KN75

UTC    dB Audio  Message
100145  -4 1443  RZ5D R3KCW RR73
081100  -2 2628  RZ5D RR73; R5FN <R6DOB/M> -12 (x2)
133730  -7 2180  RZ5D UA3WDO -06 (x2)
165945 -19  761  R3VA RZ5D KN75
074930 -18 1084  OH/HB9BWE RZ5D KN75
075730  -1 1877  RZ5D R1530IG -06
075745  -9 1047  IR7MGGC RZ5D R-08
075800  +4 1877  RZ5D RR73; DL1CC <...> +12
125015  -8 1714  RZ5D UB4HVA -19 (x2)
131830  -1 2426  RZ5D R4SCB -11 (x2)
144100 -15 1900  RZ5D RA3TT RR73

UTC    dB Audio  Message
091745 -14  887  R3BEO RZ5D KN75
092215 -13  888  RC2Y RZ5D KN75 (x3)
133115 -13  685  RZ5D RA4ABH +06
144645 -18 1913  RZ5D RZ3DZ RR73
144700 -12  726  RZ3DZ RZ5D R+02
144830 -13  855  R7TO RZ5D KN75
145215  -6 2501  RZ5D RA3FH -01 (x2)
150045  -9 2047  RZ5D RN6MA RR73
080330 -11  513  R6FMF RZ5D KN75
120645  -4  531  RZ5D LZ2SPD KN22 (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.