IU0TPA — reception at SO8OO

Observed FT8 message patterns

Attributed sample

1,386 messages

Active dates

59 UTC dates

Estimated median S/N

-5 dB

Estimated 10th-90th percentile

-11.5 to +4 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 20, moderate (-15 to -9 dB) 363, strong (≥ -8 dB) 1,003.

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 IU0TPA 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 IU0TPA

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

JN61 · 819 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,158 km (approx.)

Last such locator decoded

2026-10-17 19:55 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
194615 -15  640  SK5CN IU0TPA JN61
194745 -14  640  UA9JTJ/9 IU0TPA R-13
194945 -12  640  IQ3TR IU0TPA JN61 (x8)
195900  -9  639  R5BM/M IU0TPA R-09 (x2)
055215 -14  269  IU0TPA M9DNC -12 (x3)

UTC    dB Audio  Message
230215  -4  603  CT3IQ IU0TPA JN61
211700 -17 1612  IU0TPA II6IGTO -02
212145 -17  663  <II9IABJ> IU0TPA JN61
212200 -12  943  IU0TPA II9IABJ -03
212215 -21  663  II9IABJ IU0TPA R+10 (x3)
212730 -20 1172  IU0TPA II6IALU -12
212745 -20  662  II9IABJ IU0TPA R-13

UTC    dB Audio  Message
092815 -16  878  2E0MBH IU0TPA 73
093415 -14  875  DN9TB IU0TPA R-14
094445  +0  764  IU0TPA F8RZ +10
172845 -24 1581  IU0TPA F4HTA -03
173215  -2  703  IU0TPA LZ2VQ RR73
173430 -14 1370  IU0TPA LZ5UY +08
173445 -11  703  LZ5UY IU0TPA R+14
173500 -12 1370  IU0TPA LZ5UY RR73
095430 -13  884  VK4XA IU0TPA JN61
095500 -13  885  SP3Q IU0TPA JN61
095730 -12  885  JE6WOQ IU0TPA R-14

UTC    dB Audio  Message
063600  +9  677  ZY7F IU0TPA JN61 (x4)
063800  -3  677  VK4XK IU0TPA JN61 (x7)
064330 +10  675  VK4BPK IU0TPA JN61 (x4)

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.