JF1DCN — reception at SO8OO

Observed FT8 message patterns

Attributed sample

7 messages

Active dates

3 UTC dates

Estimated median S/N

-19 dB

S/N percentile sample

Too small

Recurring-pattern threshold

Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 0.

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 JF1DCN in decoded directed-looking exchanges:

Most frequent locator attributed to JF1DCN

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 · 4 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

8,693 km (approx.)

Last such locator decoded

2026-10-24 21:18 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
194415 -12 3078  JF1DCN PA0O -18 (x8)
205645 -16 1361  JF1DCN OH0Z -19 (x2)
164745 -16 2475  JF1DCN RJ6B KN95
165145  +9 1043  JF1DCN R5WW KO81 (x4)

UTC    dB Audio  Message
204600 -14 2473  JF1DCN HF7X KO01
205445 -13  245  JF1DCN 4X1UF -02 (x2)
142215 -10 1907  JF1DCN DK7ZT -16 (x2)
204930  +4  285  JF1DCN F8MRQ JN17 (x3)

UTC    dB Audio  Message
204400 +19 2460  JF1DCN HA7XL JN97 (x2)
204500 +11 2053  JF1DCN UW5KW KO30
204500 +13 2460  JF1DCN HA7XL R-18
204515 -17  455  HA7XL JF1DCN RR73
204530  -3 2409  JF1DCN RO2X KO74
204530 +16 2460  JF1DCN HA7XL 73
204600  -1 2409  JF1DCN RO2X KO74
204615 -19  455  RO2X JF1DCN -15
204630  +5 2409  JF1DCN RO2X R-14 (x2)
204730 +14 2053  JF1DCN UW5KW KO30 (x2)
211015 -20 2459  CT7BQH JF1DCN PM95
211845 -14 2752  S9R JF1DCN PM95

UTC    dB Audio  Message
102100 -19 1262  JF1DCN CU2AP -02
104830 -12 1145  JF1DCN ON6AA JO11

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.