SP9CTW — reception at SO8OO

Observed FT8 message patterns

Attributed sample

394 messages

Active dates

15 UTC dates

Estimated median S/N

+3 dB

Estimated 10th-90th percentile

-6 to +11 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 23, strong (≥ -8 dB) 363.

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 SP9CTW 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 SP9CTW

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

JN99 · 274 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

206 km (approx.)

Last such locator decoded

2026-10-20 10:19 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
104115  +6  627  SP6AMI SP9CTW R+15 (x3)
101915  -5 2051  MW3FLI SP9CTW JN99 (x3)
102030 -15 1849  SP9CTW SP4GDW JO93
102045  -2 1849  SP4GDW SP9CTW +16 (x2)
102130 -16 1849  SP9CTW SP4GDW 73
102145  +2 1931  OS4K SP9CTW R-09 (x2)
102315  +3 2050  F4NKK SP9CTW -20 (x3)

UTC    dB Audio  Message
174700  -8  800  SP9CTW SV2CLJ KN10 (x3)
175400 -12  918  SP9CTW RN6MA +11 (x2)
180115  +1  775  SP9CTW Z61DX +15 (x3)
105930 -18 1214  SP9CTW EB1LA IN73 (x7)

UTC    dB Audio  Message
183630 -17 1631  SP9CTW DK9BF JO42 (x2)
183715  +0 1631  DK9BF SP9CTW -16 (x2)
183830 -15 1621  SP9CTW DK9BF 73
183915  +1 1631  CQ SP9CTW JN99 (x2)
171500  +9 1482  SV9ANK SP9CTW JN99 (x5)
171730  +6 1402  R2FC SP9CTW JN99 (x3)

UTC    dB Audio  Message
200645  -3 2347  SP9CTW SP4WJ KO03 (x3)
061615 +10 1637  CQ SP9CTW JN99
061645 +11 1438  SO100PKP SP9CTW JN99
061700  +6 1435  SP9CTW SO100PKP +02
061715 +14 1437  SO100PKP SP9CTW JN99
061730  +7 1435  SP9CTW SO100PKP +04
061745 +15 1437  SO100PKP SP9CTW R+20 (x2)
061915 +11 1434  SN40KZE SP9CTW R+18 (x2)
170300  +7 1898  SP9CTW SN100PKP +02
170315 +15  595  SN40KZE SP9CTW R+11
170330  -1 1898  SP9CTW RR73; SP2KSN <...> -04

UTC    dB Audio  Message
124415 -12 1553  SP9CTW IZ5RKH R-11 (x2)
173300 -21 1167  SP9CTW CN8NS RR73
171815 -18 1288  SP9CTW UR5XEJ R+02
113130 -11 1589  SP9CTW SQ1RTU -06
144130  -1 1137  SP9CTW TA3NK KM39 (x3)
134330 -14  338  SP9CTW SM0EJR -19 (x7)

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.