I4TSB — reception at SO8OO

Observed FT8 message patterns

Attributed sample

70 messages

Active dates

2 UTC dates

Estimated median S/N

+2 dB

Estimated 10th-90th percentile

-7 to +9 dB

Recurring-pattern threshold

Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 65.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with I4TSB 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 I4TSB

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

JN64 · 40 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

897 km (approx.)

Last such locator decoded

2026-11-03 18:58 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
183100  +0 1171  I4TSB IK4TVP -14 (x4)
185330 +11  589  OH3SW I4TSB JN64 (x11)

UTC    dB Audio  Message
183130  -3  826  OH7GGX I4TSB JN64 (x3)
183715  -1  825  I4TSB OH7GGX -11
183730  +4  826  OH7GGX I4TSB R-14
183745  -1  825  I4TSB OH7GGX RR73
183800  -1  826  OH7GGX I4TSB 73
183815  +2 1264  I4TSB SP7ENZ -13
184115  +8  904  OD5ZZ I4TSB JN64 (x3)
184300 -10  720  I4TSB OD5ZZ -15
184315  +5  904  OD5ZZ I4TSB R-16
184330 -12  719  I4TSB OD5ZZ RR73
184345  +5  904  OD5ZZ I4TSB 73

UTC    dB Audio  Message
135130  -5  842  PT9RR I4TSB JN64 (x2)
135300 -15 1237  ZR6LO I4TSB JN64 (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.