ZS1J — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

197 messages

Active dates

9 UTC dates

Estimated median S/N

-11 dB

Estimated 10th-90th percentile

-18 to -3 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 33, moderate (-15 to -9 dB) 103, strong (≥ -8 dB) 61.

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 ZS1J 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 ZS1J

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

JF96 · 38 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

9,282 km (approx.)

Last such locator decoded

2026-09-02 19:51 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
195045  +7 1449  ZS1J DJ7YP JO41
195115  -2 1847  ZS1J F6BPZ RR73
195115  +2 2701  ZS1J OZ1JVX JO46
195115  +5 1449  ZS1J DJ7YP JO41 (x2)
195345 +18 1175  ZS1J SP2HNF JO94 (x9)
195945 -10 2167  ZS1J DL1API JO51

UTC    dB Audio  Message
192600 -11 1738  ZS1J EA5JLN IM99
192615  +2  477  ZS1J RW4M LO44
192615  +1  769  ZS1J RZ4LC LO44
192630 -13 1738  ZS1J EA5JLN IM99
192645  -7 2326  ZS1J PD3PAM JO32
192645  -1  769  ZS1J RZ4LC LO44
192700 -11 1738  ZS1J EA5JLN IM99
192715  -9 2326  ZS1J PD3PAM JO32
192715  -3  769  ZS1J RZ4LC LO44
192730 -12 1738  ZS1J EA5JLN IM99
192745  -8  479  ZS1J UB3FBD KO85
192815  -8 2326  ZS1J PD3PAM JO32 (x3)
193045  +3  478  ZS1J IK0NGL JN62

UTC    dB Audio  Message
214445  +6 1946  ZS1J R7LV KN97
214445 +18 1467  ZS1J SP9HZW KO00
214515  -8  611  ZS1J EA3AKA JN00
214515  +6  246  ZS1J IK7LJZ JN71
214515  +3 1946  ZS1J R7LV KN97
214515 +15 1431  ZS1J SP9HZW KO00
214530  +0 1640  ZS1J DJ4LK JN59
214545 +13 1431  ZS1J SP9HZW KO00
214545  +9 1598  ZS1J DF8XC JO41
214600  +1 1640  ZS1J DJ4LK JN59
214615 +10 1569  ZS1J DF8XC JO41
214615 +15 1431  ZS1J SP9HZW KO00
214615  -9  612  ZS1J EA3AKA JN00
214630  +5 1640  ZS1J DJ4LK JN59 (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.