IU4FJI — 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: JN54

Receiver-side FT8 activity involving IU4FJI, decoded by SO8OO in southeastern Poland. 156 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 9 UTC dates in the available aggregate history. Observed between 2026-08-27 and 2026-11-03.

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 156 FT8 messages attributed to IU4FJI as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (50%), followed by 60 m (22%) and 160 m (12%). Several six-hour UTC windows tied for the largest share (90%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (74%); the estimated median was -4 dB.

Overview

156
Messages attributed
9
UTC dates decoded
23
Active 15-min windows
-4 dB
Estimated median S/N

Bands

160m · 19 80m · 11 60m · 35 40m · 78 20m · 4 10m · 9
First attributed message: 2026-08-27
Last attributed message: 2026-11-03 19:52 UTC

Observed FT8 message patterns

Attributed sample
156 messages
Active dates
9 UTC dates
Estimated median S/N
-4 dB
Estimated 10th-90th percentile
-15 to +2 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 26, strong (≥ -8 dB) 115.

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 IU4FJI 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 IU4FJI

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
JN54 · 106 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,013 km (approx.)
Last such locator decoded
2026-11-03 19:44 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 UTCBandIU4FJI S/NCounterpartCounterpart S/NMsgsCapture
11-03 19:49 60m -18 / - DJ0MAB -5 / -12 5 Partial capture
11-03 19:49 60m -10 / -25 DL5DQZ -20 / -6 6 ✓ Full exchange observed
11-03 19:48 60m -14 / -16 DK3JW -13 / -12 5 ✓ Full exchange observed
11-03 19:47 60m -14 / - VE1YX - / -8 2 ✓ Closing fragment
11-03 19:44 60m -19 / - DJ0MAB -12 / -12 4 Partial capture
11-03 19:44 60m -17 / - F5HNQ +1 / +4 2 Partial capture
11-03 19:44 60m - / -2 PE1MHY -2 / - 3 Partial capture
10-06 19:09 40m +10 / - V51WH - / - 6 Partial capture
10-02 19:30 160m -10 / -14 9A4ZM -7 / - 4 ✓ Closing observed
10-02 19:25 160m -7 / - DG6ITP -12 / -7 3 Partial capture
09-21 19:06 160m -19 / - F4IIX - / - 2 ✓ Closing fragment
09-21 19:01 160m -17 / - LX1JX - / - 2 Partial capture
09-21 18:59 160m -16 / -8 SQ9PBV +5 / -4 5 ✓ Full exchange observed
09-21 17:04 80m +1 / - IU5KWL -12 / -6 3 ✓ Closing observed
09-21 17:02 80m -3 / -19 US7KC +13 / 0 5 ✓ Full exchange observed
09-17 18:38 60m -3 / -15 4Z5NN -20 / -16 7 ✓ Full exchange observed
09-17 18:37 60m -9 / +2 DK1XAM -6 / +2 4 ✓ Full exchange observed
09-17 18:35 60m -8 / - YO3HEY - / - 2 Partial capture
09-17 18:33 60m -8 / -2 US2YW +3 / +6 5 ✓ Full exchange observed
09-17 18:32 60m -4 / +6 OI5AY +4 / -14 4 ✓ Full exchange observed
09-17 18:30 60m -4 / +5 GE7RTI -12 / -6 5 ✓ Full exchange observed
09-17 18:27 60m -2 / -3 EA1IOK -6 / -14 5 ✓ Full exchange observed
09-17 18:27 60m -3 / +9 ON7GB -3 / -1 7 ✓ Full exchange observed
09-04 19:24 40m -3 / - RI1FJL - / - 5 Partial capture
09-04 19:22 40m -5 / - IU5HIU - / -3 2 ✓ Closing fragment
09-04 19:05 40m -2 / - RI1FJL - / - 29 Partial capture
09-04 18:44 40m -4 / - RI1FJL - / -8 16 Partial capture
09-04 18:43 40m - / - SP6FME +6 / - 2 Partial capture
09-04 18:41 40m 0 / -2 OE6TNO 0 / +4 4 ✓ Full exchange observed
09-04 18:32 40m 0 / - RI1FJL - / - 12 Partial capture
09-01 18:46 40m -12 / - IZ8PPI - / -8 2 Partial capture
09-01 05:14 60m -10 / - VE2LBI - / - 2 Partial capture
08-27 10:23 10m -6 / - 5W1SA - / - 2 Partial capture
08-27 09:47 10m -3 / - 5W1SA - / - 7 Partial capture
08-27 06:49 20m +6 / - RI1FJL - / -10 4 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

60m 
UTC    dB Audio  Message
194845 -15 2141  DK3JW IU4FJI -12
194900 -20 2219  IU4FJI DL5DQZ JO61
194900 -14 1420  IU4FJI DK3JW R-16
194915 -13 2141  DK3JW IU4FJI RR73
194930 -11 1420  IU4FJI DK3JW 73
194930  -9 2139  IU4FJI DJ0MAB JN49
194945 -10 2141  DL5DQZ IU4FJI -06
195000 -22 2219  IU4FJI DL5DQZ R-25
195000  -3 2139  IU4FJI DJ0MAB JN49
195015  -9 2141  DL5DQZ IU4FJI RR73
195030  -3 2139  IU4FJI DJ0MAB JN49
195045 -20 2141  DJ0MAB IU4FJI -12 (x2)
195200 -19 2219  IU4FJI DL5DQZ R-25
195215 -12 2141  DL5DQZ IU4FJI RR73
160m 
UTC    dB Audio  Message
190515 -12 2029  CQ IU4FJI JN54
190615 -17 2030  F4IIX IU4FJI RR73 (x2)
192515 -15 1298  IU4FJI DG6ITP JO71
192530  -7 1298  DG6ITP IU4FJI -07
192545  -8 1298  IU4FJI DG6ITP JO71
192815  +4 1002  IU4FJI DK5IR R-07
193030 -16 1298  CQ IU4FJI JN54
193045  -9 1294  IU4FJI 9A4ZM JN86 (x2)
193130 -10 1298  9A4ZM IU4FJI RR73
193145  -7 1294  IU4FJI 9A4ZM 73
193315 -13 2700  CQ IU4FJI JN54 (x3)
40m 
UTC    dB Audio  Message
192115  -3 1408  RI1FJL IU4FJI JN54 (x2)
192215  -5 1408  IU5HIU IU4FJI -03 (x2)
192415  -2 1942  RI1FJL IU4FJI JN54 (x5)
190915 +12 2814  V51WH IU4FJI JN54 (x6)
80m 
UTC    dB Audio  Message
170045 -11 2400  RK4HS IU4FJI JN54
170215  -1 2544  CQ IU4FJI JN54
170230 +15 1745  IU4FJI US7KC KO21
170245  -4 2544  US7KC IU4FJI +00
170300 +15 1745  IU4FJI US7KC R-19
170315  -2 2544  US7KC IU4FJI RR73
170330 +10 1745  IU4FJI US7KC 73
170415  -5 2544  CQ IU4FJI JN54
170445  +0 2544  IU5KWL IU4FJI R-06
170500 -12 2544  IU4FJI IU5KWL RR73
170515  +2 2544  IU5KWL IU4FJI 73
170545  +4 2544  CQ IU4FJI JN54 (x4)
10m 
UTC    dB Audio  Message
094745  -4 1915  5W1SA IU4FJI JN54 (x9)
20m 
UTC    dB Audio  Message
064945  +7 1835  RI1FJL IU4FJI JN54 (x4)
091530  +0 2208  IU4FJI 9A5E -15

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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