S51TN — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

936 messages

Active dates

26 UTC dates

Estimated median S/N

+4 dB

Estimated 10th-90th percentile

-9 to +13 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 10, moderate (-15 to -9 dB) 99, strong (≥ -8 dB) 827.

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 S51TN 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 S51TN

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 · 561 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

631 km (approx.)

Last such locator decoded

2026-09-20 09:26 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
082200  +8  450  IZ4AIF S51TN RR73
082215  +1  451  S51TN IZ4AIF 73
082300  +6  451  CQ S51TN JN76 (x5)
082630  +5  451  2E0UMK S51TN -21 (x6)
092530  -6 2067  IS0LYN S51TN JN76 (x2)

UTC    dB Audio  Message
014715 +14  675  N1IWP S51TN R-18 (x2)
014815  +7  675  W3DQS S51TN JN76 (x6)
015145  +8 2033  4X1UF S51TN JN76 (x2)
015230 -16  198  S51TN 4X1UF +08
015245  +5 2033  4X1UF S51TN R-07
015300 -16  198  S51TN 4X1UF RR73
015315  +8 2033  KY2J S51TN R-17 (x2)

UTC    dB Audio  Message
160300  -4  762  9H4CM S51TN JN76 (x2)
161500  -2  761  UB3BDB S51TN -17
111230 -24 2004  S51TN VP2MAA -12
111745  -1  522  VP2MAA S51TN R-12 (x2)
111930  -4  473  S51TN F6BHK JN24
112000  -5  472  S51TN TA3NK R-09 (x2)
112845  +9 2481  S51TN IQ4JO JN63
112915  -3  797  S51TN R7OV KN87 (x3)
113415  -9  885  S51TN PD1WMD R+09 (x2)

UTC    dB Audio  Message
142200  +0  419  S51TN DK3HV JO31
142230 -19 2305  S51TN G4DBW JO01
142230  -1  419  S51TN DK3HV JO31
143300 -15 2047  S51TN PD1ADA R-03 (x2)
143630 -11 1842  S51TN DL8TT R+13 (x2)
075900 -16 2231  S51TN ON5RZ JO21 (x7)
083800 -12  672  CQ S51TN JN76

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.