SP9N — reception at SO8OO

Observed FT8 message patterns

Attributed sample

230 messages

Active dates

8 UTC dates

Estimated median S/N

+8 dB

Estimated 10th-90th percentile

0 to +18 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 11, strong (≥ -8 dB) 214.

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 SP9N 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 SP9N

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

JO90 · 199 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

208 km (approx.)

Last such locator decoded

2026-11-04 19:48 UTC

Other locator fields attributed to this token: KO11 (4).

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
211445  +0 1209  RK3AW/P SP9N JO90 (x4)
211945  +5 1010  6W/IK2HKT SP9N JO90 (x2)
194715  +6 1310  <...> SP9N JO90
194745 +16 1045  6W/IK2HKT SP9N JO90 (x8)

UTC    dB Audio  Message
060930 -22 1965  SP9N W3UA RR73
060945 +14  948  W3UA SP9N 73
061000 -22 1049  SP9N EA1IOK IN62 (x2)
061045 +14  947  EA1IOK SP9N -20
061100 -23 1050  SP9N EA1IOK R-09
061115 +16  947  EA1IOK SP9N RR73
061130 -23 1050  SP9N EA1IOK 73
061345 +17  947  V26JJ SP9N JO90 (x7)

UTC    dB Audio  Message
192545  +9 2696  3B9/SQ9UM SP9N JO90 (x3)
155115 +14 2445  ZA5G SP9N JO90 (x8)
185045 -12 1318  UA9XL/P SP9N JO90 (x2)

UTC    dB Audio  Message
122545 -19 2313  CQ SP9N JO90                          a1
122730 -22 1599  SP9N CT7AXN RR73
123115 -16 2312  VK6SP SP9N -03 (x2)
124215 -15 2313  4X1UF SP9N R-08

UTC    dB Audio  Message
194115 +13 2399  OJ0YL SP9N JO90 (x14)
195600 -17 1868  SP9N RR73; IW5DNZ <...> +00

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.