JH1OBS — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

147 messages

Active dates

19 UTC dates

Estimated median S/N

-9 dB

Estimated 10th-90th percentile

-16 to 0 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 18, moderate (-15 to -9 dB) 60, strong (≥ -8 dB) 69.

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 JH1OBS 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 JH1OBS

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

PM95 · 83 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

8,693 km (approx.)

Last such locator decoded

2026-09-10 17:14 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
132845  -7 2634  JH1OBS 4X1UF +01
221345 -12 1995  JH1OBS IK1LRX JN34
221415 -14 1246  JH1OBS TM8WWA RRR
221415  -8 1995  JH1OBS IK1LRX JN34 (x4)
084615 -23 1596  JH1OBS R6DVV 73
084845 -22 1482  JH1OBS RO6K R-16
101515  -1  496  JH1OBS <...> -03

UTC    dB Audio  Message
172530 -13 1491  JH1OBS R3RB LO03
172530  -6  472  JH1OBS DL1SRS JN49
172545  -3  473  R3RB JH1OBS -06
172600  -8 1492  JH1OBS R3RB R+04
172600  -3 1766  JH1OBS PA5VL +00
172615  +2  473  R3RB JH1OBS RR73
172630  -1  960  JH1OBS PA5VL +00
172630 -11 1949  JH1OBS PA3GDL JO22
172630  +1  473  JH1OBS DL1SRS JN49
172700  +0  960  JH1OBS PA5VL RR73
172730  -9 2037  JH1OBS PA3GDL JO22 (x5)

UTC    dB Audio  Message
165900  +4  304  JH1OBS SV8JE 73
165930 +10 2666  JH1OBS YO6LM KN25
170000  +5 2826  JH1OBS UT7UA KO50 (x5)
170500 +13  497  JH1OBS SP9FZH JN99
170500  -4 1697  JH1OBS R3EDI KO82
170530 +18  497  JH1OBS SP9FZH JN99 (x6)

UTC    dB Audio  Message
215300  -8 1056  JH1OBS DL1YKQ R-02 (x2)
215715 -17 1057  DD6CS JH1OBS R-17
215845 -16 1057  SU3YM JH1OBS PM95
220700  -8 2913  JH1OBS DF5AH 73
213630 -19 1520  JH1OBS EA8DGI -10 (x4)
214045 -17 1181  ON4XM JH1OBS PM95 (x6)

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.