IU0RBF — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN61

Receiver-side FT8 activity involving IU0RBF, decoded by SO8OO in southeastern Poland. 66 FT8 messages attributed to this token as transmitter, on 40m, across 5 UTC dates in the available aggregate history. Observed between 2026-09-19 and 2026-10-15.

These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.

SO8OO decoded 66 FT8 messages attributed to IU0RBF as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). Several six-hour UTC windows tied for the largest share (86%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (79%); the estimated median was -4 dB.

Overview

66
Messages attributed
5
UTC dates decoded
9
Active 15-min windows
-4 dB
Estimated median S/N

Bands

40m · 66
First attributed message: 2026-09-19
Last attributed message: 2026-10-15 23:10 UTC

Observed FT8 message patterns

Attributed sample
66 messages
Active dates
5 UTC dates
Estimated median S/N
-4 dB
Estimated 10th-90th percentile
-10 to +3 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 14, strong (≥ -8 dB) 52.

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 IU0RBF 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 IU0RBF

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 · 53 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,158 km (approx.)
Last such locator decoded
2026-10-15 23:10 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.

Time UTCBandIU0RBF S/NCounterpartCounterpart S/NMsgsCapture
10-15 23:09 40m -11 / - W7O - / - 2 Partial capture
10-15 23:04 40m -7 / - KE8ZMQ - / -21 4 ✓ Closing fragment
10-15 22:59 40m 0 / - KE8ZMQ - / - 3 Partial capture
10-05 06:27 40m -8 / - WD4OBP - / - 2 Partial capture
10-05 06:25 40m -5 / - YV5YAM - / - 2 Partial capture
09-20 04:27 40m +4 / - NO5Z - / - 3 Partial capture
09-20 04:25 40m -2 / - KR9U - / - 2 Partial capture
09-20 04:24 40m -4 / - WX7P - / - 2 Partial capture
09-20 04:16 40m +4 / - W3GO - / - 2 Partial capture
09-20 04:08 40m +2 / - N1EDF - / - 3 Partial capture
09-20 04:06 40m 0 / - WA6LTV - / - 3 Partial capture
09-20 04:05 40m -5 / - KR4DJY - / - 3 Partial capture
09-20 04:03 40m -8 / - W2JC - / - 3 Partial capture
09-20 04:02 40m - / - F5PBG -6 / - 2 Partial capture
09-20 04:01 40m -4 / - SQ9CXH - / -3 2 ✓ Closing fragment
09-20 03:58 40m -6 / - W3L - / -17 4 ✓ Closing fragment
09-20 03:57 40m -6 / - N1EDF - / - 2 Partial capture
09-20 03:53 40m -6 / - KA0JWC - / -18 4 ✓ Closing fragment
09-19 05:05 40m -2 / - WB3JSZ - / - 2 Partial capture
09-19 05:04 40m -4 / - KN4KYD - / - 3 Partial capture
09-19 05:00 40m -1 / - KS1WK - / -20 4 ✓ Closing fragment
09-19 04:52 40m -7 / - KO4OIG - / - 3 Partial capture
09-19 04:51 40m -8 / - KE9END - / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

40m 
UTC    dB Audio  Message
042900  +3 2437  NO5Z IU0RBF JN61
062530  -4 2359  YV5YAM IU0RBF JN61 (x2)
062730  -8 2359  WD4OBP IU0RBF JN61 (x2)
045115  -9 2159  KB8CR IU0RBF JN61
225900  +0  635  KE8ZMQ IU0RBF JN61 (x7)
230945 -12 2117  W7O IU0RBF JN61 (x2)
80m 
UTC    dB Audio  Message
064100 -16 1978  IU0RBF F4UJU -07

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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