UD8S — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

5,227 messages

Active dates

67 UTC dates

Estimated median S/N

-15 dB

Estimated 10th-90th percentile

-23 to -4.3 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2,583, moderate (-15 to -9 dB) 1,657, strong (≥ -8 dB) 987.

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 UD8S 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 UD8S

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

LO71 · 3,663 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

2,324 km (approx.)

Last such locator decoded

2026-09-08 19:41 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
193715 -20 1385  YO8CKT UD8S -08 (x2)
193845 -23 1385  CQ UD8S LO71 (x2)
194015 -16 1385  OH6NIO UD8S -13 (x2)
194115 -21 1385  CQ UD8S LO71
194145 -16 1385  HF5A UD8S -18 (x4)
194615 -18 1385  YO8CKT UD8S -11 (x4)

UTC    dB Audio  Message
160015  -9 1891  RI1FJL UD8S R-12 (x2)
160115 -11 1891  CQ UD8S LO71 (x2)
160245 -15 1891  UB2FEK UD8S -15 (x2)
160345 -16 1891  RZ9SP UD8S +00 (x2)
161345 -17 1891  CQ UD8S LO71
043830  -9 1405  UD8S Z62NS R-11 (x5)
050600  -7  946  UD8S EU4BD RR73

UTC    dB Audio  Message
185145 -16 1723  RA3ZOM UD8S -06 (x3)
185545 -19 1724  CQ UD8S LO71
185600 -16 1722  UD8S IV3DSG JN66
185800 +10 2708  UD8S 9A4N JN75 (x3)
190400 -20 1817  UD8S R3DLK R+01 (x2)
191945 -20 1724  CQ UD8S LO71 (x2)
192100  -2 1723  UD8S SP9SOS KN09 (x2)
192145 -12 1724  CQ UD8S LO71

UTC    dB Audio  Message
152115 -17 2020  CQ UD8S LO71
152500 -20 2019  UD8S II7MGMU
152530 -13 2020  UD8S DL3MML JO40 (x2)
152615 -14 2020  DL3MML UD8S -19
152630 -10 2020  UD8S DL3MML R-06
154815 -24 2019  CQ UD8S LO71
155030 -14 1651  UD8S PE1DQV R-16
155045  -3 2021  PE1DQV UD8S RR73
155115  +0 2021  CQ UD8S LO71
155200  -6 2000  UD8S EA5JLB +00
155215  -1 2021  EA5JLB UD8S R-10
155230  -7 1970  UD8S EA5JLB RR73
155245  -8 2021  EA5JLB UD8S 73
155345  -6 1725  RL2F UD8S -22

UTC    dB Audio  Message
103815 -23 1734  UD8S PE9JAN JO22
104615  +1  489  UD8S IK4LZH JN54 (x4)
084045 -22 1257  UD8S CR7BUJ IM58 (x2)
084715 -20 1960  UD8S IN3IZQ R-10
090445  -5  959  UD8S F9SS JN18 (x2)
092645 -23 1915  UD8S IU2LXG JN55
094215 -19 1963  UD8S IU4PQN JN54
071100 -22 1700  UD8S OE5WRO JN78 (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.