N4RJ — 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: United States Most frequent locator attributed to this token: EM91

Receiver-side FT8 activity involving N4RJ, decoded by SO8OO in southeastern Poland. 51 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, across 12 UTC dates in the available aggregate history. Observed between 2026-07-12 and 2026-11-06.

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 51 FT8 messages attributed to N4RJ as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (41%), followed by 40 m (22%) and 60 m (20%). Several six-hour UTC windows tied for the largest share (94%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.

Overview

51
Messages attributed
12
UTC dates decoded
17
Active 15-min windows
-14 dB
Estimated median S/N

Bands

160m · 6 80m · 21 60m · 10 40m · 11 20m · 3
First attributed message: 2026-07-12
Last attributed message: 2026-11-06 23:20 UTC

Observed FT8 message patterns

Attributed sample
51 messages
Active dates
12 UTC dates
Estimated median S/N
-14 dB
Estimated 10th-90th percentile
-24 to -6 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 18, moderate (-15 to -9 dB) 20, strong (≥ -8 dB) 13.

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 N4RJ 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 N4RJ

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
EM91 · 40 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,210 km (approx.)
Last such locator decoded
2026-11-06 23:20 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 UTCBandN4RJ S/NCounterpartCounterpart S/NMsgsCapture
11-01 00:05 60m -11 / - S9R - / - 5 Partial capture
10-31 23:53 60m - / - GI4SNA -2 / - 5 Partial capture
10-31 23:52 60m -10 / - ER5DX - / - 2 Partial capture
10-30 02:17 60m - / -7 OK1BN +1 / - 4 ✓ Closing fragment
10-30 02:17 60m - / -14 DK3JW +14 / - 4 ✓ Closing fragment
10-30 02:16 60m - / -18 DH3YAK +1 / - 3 ✓ Closing fragment
10-23 00:12 60m - / -17 EP2AES -9 / - 3 ✓ Closing fragment
10-22 23:20 60m - / -22 EA5JLB -2 / - 6 Partial capture
10-04 23:42 60m - / - DK7QJ +5 / - 2 Partial capture
10-03 01:13 160m -20 / -13 LA9JKA -4 / -19 4 ✓ Full exchange observed
10-03 01:06 160m -24 / - LA9JKA -8 / -17 9 Partial capture
10-03 01:03 160m -22 / -16 OH5KNL +5 / -16 6 ✓ Full exchange observed
09-27 22:28 40m -7 / - A61DD - / - 7 Partial capture
09-27 01:30 80m - / - RY7F +3 / - 3 Partial capture
09-27 01:29 80m - / - OM1DMT +26 / - 4 Partial capture
09-27 01:29 80m - / -3 ON3ANY +15 / - 6 Partial capture
09-27 01:29 80m -7 / - DK8HC/P - / -10 3 Partial capture
09-03 23:05 40m - / -6 IZ8EYN 0 / - 4 Partial capture
09-03 23:03 40m -6 / -11 EA3AAY -15 / - 7 ✓ Closing observed
09-02 00:57 80m - / - IK5CHL +5 / - 2 Partial capture
09-02 00:52 80m -15 / - RI1FJL - / - 16 Partial capture
08-28 10:48 20m - / -9 RU3GF +26 / - 2 Partial capture
08-28 10:44 20m - / - DK9ZQ +11 / - 4 Partial capture
08-28 10:44 20m - / - M7PHE -23 / - 3 Partial capture
08-28 00:03 80m - / - DO8JB -5 / - 13 Partial capture
08-28 00:01 80m - / -18 RT2F +17 / - 2 ✓ Closing fragment
08-21 08:24 20m - / - DM3YBN -10 / - 2 Partial capture
08-21 08:20 20m - / -3 LY3BES -11 / - 4 Partial capture
08-21 08:20 20m - / - DL9IQ -12 / - 3 Partial capture
08-21 08:19 20m -22 / - JQ2LVH - / -15 2 Partial capture
08-20 23:08 40m -18 / -10 8Q7PR -12 / - 3 ✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
012945 +12  542  N4RJ ON3ANY -03
012945 +27 2852  N4RJ OM1DMT JN88
013000  -6  549  DK8HC/P N4RJ R-10
013015 +13  551  N4RJ ON3ANY -03
013045  +5 1632  N4RJ RY7F LN04
013045 +15  551  N4RJ ON3ANY -03
013045 +25 2852  N4RJ OM1DMT JN88
013115  +3 1632  N4RJ RY7F LN04
013115 +13  551  N4RJ ON3ANY -03
013115 +25 2852  N4RJ OM1DMT JN88
013145  +2 1632  N4RJ RY7F LN04
013145 +16  551  N4RJ ON3ANY -03
013145 +26 2852  N4RJ OM1DMT JN88
013215 +19  551  N4RJ ON3ANY -03
232000 -24 1769  A41CK N4RJ EM91
60m 
UTC    dB Audio  Message
021900  +1 1379  N4RJ OK1BN 73
230615 -24 1228  S79VU N4RJ EM91
235200 -16 1120  ER5DX N4RJ EM91 (x2)
235330  -3  784  N4RJ GI4SNA IO64 (x5)
000545 -10 2622  S9R N4RJ EM91 (x3)
000915  -8 2622  9A5CY N4RJ +02
001015  -9 2622  S9R N4RJ EM91 (x2)
40m 
UTC    dB Audio  Message
230600 -15 1339  N4RJ EA3AAY JN11
230630  -4  734  N4RJ IZ8EYN -06
230630 -17 1339  N4RJ EA3AAY R-11
230645  -6 1184  EA3AAY N4RJ RR73
230700  +3  735  N4RJ IZ8EYN -06
230700 -12 1339  N4RJ EA3AAY 73
230730  -3  734  N4RJ IZ8EYN -06
222830  -5  464  A61DD N4RJ EM91 (x7)
220615 -21 1499  N4RJ F1HFP JN28
160m 
UTC    dB Audio  Message
010445 -24 1940  OH5KNL N4RJ R-16
010500  +7 2362  N4RJ OH5KNL RR73
010630 -16 1564  N4RJ LA9JKA JP32
010645 -24 1940  LA9JKA N4RJ EM91
010700  -8 1563  N4RJ LA9JKA JP32 (x3)
010815 -23 1940  LA9JKA N4RJ -17
010830 -12 1563  N4RJ LA9JKA JP32 (x3)
011315 -17 1626  LA9JKA N4RJ EM91
011330  -1 1563  N4RJ LA9JKA -13
011345 -24 1626  LA9JKA N4RJ R-19
011400  -6 1563  N4RJ LA9JKA RR73
20m 
UTC    dB Audio  Message
082230  -7 1984  N4RJ LY3BES -03
082330 -21 1803  N4RJ UA1WBV KO47
082400  -9 1984  N4RJ DM3YBN JO60 (x2)
082600 -10  672  N4RJ F5HND JO11
104300  -1  505  N4RJ G0OSK IO91
104400 -22 1901  N4RJ M7PHE IO93
104430 +15  505  N4RJ DK9ZQ JO41
104500 -24 1900  N4RJ M7PHE IO93
104500  +8  505  N4RJ DK9ZQ JO41 (x3)
104700 -23 1900  N4RJ M7PHE IO93
104830 +24 2864  N4RJ RU3GF -09 (x2)

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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