GB5SJ — 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: England Most frequent locator attributed to this token: IO81

Receiver-side FT8 activity involving GB5SJ, decoded by SO8OO in southeastern Poland. 112 FT8 messages attributed to this token as transmitter, on 80m, across 2 UTC dates in the available aggregate history. Observed between 2026-10-17 and 2026-10-18.

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 112 FT8 messages attributed to GB5SJ as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%). In this small sample, the estimated median decoder S/N was -10 dB; no usual signal pattern is inferred.

Overview

112
Messages attributed
2
UTC dates decoded
14
Active 15-min windows
-10 dB
Estimated median S/N

Bands

80m · 112
First attributed message: 2026-10-17
Last attributed message: 2026-10-18 07:01 UTC

Observed FT8 message patterns

Attributed sample
112 messages
Active dates
2 UTC dates
Estimated median S/N
-10 dB
Estimated 10th-90th percentile
-19 to +2 dB
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 24, moderate (-15 to -9 dB) 42, strong (≥ -8 dB) 46.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with GB5SJ 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 GB5SJ

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
IO81 · 71 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,746 km (approx.)
Last such locator decoded
2026-10-18 07:01 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 UTCBandGB5SJ S/NCounterpartCounterpart S/NMsgsCapture
10-18 19:14 40m - / -15 OH4NDU -8 / - 2 ✓ Closing fragment
10-18 18:49 40m - / -18 DK2MAX -4 / - 6 Partial capture
10-18 15:08 40m - / -16 DL0PS +10 / - 2 ✓ Closing fragment
10-18 14:55 40m - / -17 G0OYQ -15 / - 3 ✓ Closing fragment
10-18 10:10 40m - / - LX1JH 0 / - 2 Partial capture
10-18 09:58 40m - / -9 DL3EBJ -12 / - 2 ✓ Closing fragment
10-18 08:19 80m - / - F5PZT -21 / - 7 ✓ Closing fragment
10-18 08:05 40m - / - F4IFO -10 / - 3 Partial capture
10-18 07:50 40m - / -16 G4YTU -14 / - 2 Partial capture
10-18 07:39 40m - / -12 PA2DX -11 / - 3 ✓ Closing fragment
10-18 07:21 80m - / -17 SP1IWC -10 / - 4 Partial capture
10-18 07:20 40m - / -14 ON5EA -12 / - 2 ✓ Closing fragment
10-18 07:06 80m - / - DL1FAM -10 / - 2 ✓ Closing fragment
10-18 07:00 80m - / - DL1FAM -1 / - 2 Partial capture
10-18 07:00 80m -18 / - EB5AFK - / - 3 Partial capture
10-18 06:59 80m -10 / - F4EOT -10 / +6 3 Partial capture
10-18 06:58 40m - / -7 F5MOO -1 / - 2 ✓ Closing fragment
10-18 06:52 80m - / - SP5ALV +14 / - 4 Partial capture
10-18 06:50 80m - / - F8CFO -16 / - 3 Partial capture
10-18 06:47 80m - / - F8CFO -14 / - 3 Partial capture
10-18 06:46 80m - / - DL1FAM -6 / - 9 Partial capture
10-18 06:44 80m -15 / - F8CFO - / - 2 Partial capture
10-18 06:42 80m -12 / - LA1HW - / - 2 Partial capture
10-18 06:41 80m - / - SP5ALV +13 / - 15 Partial capture
10-18 06:34 80m - / - DO1BWS -12 / - 2 ✓ Closing fragment
10-18 06:32 80m -15 / -4 9A5E +2 / +9 3 ✓ Full exchange observed
10-18 06:30 80m - / - DL1FAM -5 / - 6 Partial capture
10-18 06:29 80m -12 / - G1XOW - / - 3 Partial capture
10-18 06:27 80m -18 / - F5BRF - / +1 2 Partial capture
10-18 06:26 80m -4 / - ON4CAS - / +9 2 Partial capture
10-18 06:24 80m -11 / - F4PAN -4 / +6 4 ✓ Full exchange observed
10-18 06:23 80m -13 / -7 DL0MLU -12 / - 7 Partial capture
10-18 06:22 80m -15 / - DO9YU - / 0 2 Partial capture
10-18 06:21 80m -14 / - 2E0FHM - / +1 2 Partial capture
10-18 06:18 80m -12 / - DO1BOC -16 / +6 4 ✓ Full exchange observed
10-18 06:16 80m -12 / - G0WZM - / +4 2 Partial capture
10-18 06:15 80m -10 / - DO5HCS -19 / -3 3 ✓ Closing observed
10-18 06:13 80m -10 / - DO8JB - / - 3 Partial capture
10-18 06:11 80m -11 / -6 DM2GG -21 / +1 6 ✓ Full exchange observed
10-18 06:04 80m - / - OM2JK -13 / - 3 Partial capture
10-18 06:03 80m - / - G4OZG -20 / - 6 Partial capture
10-18 06:03 80m - / - SP5KG +6 / - 2 Partial capture
10-18 06:03 80m - / - DD8BA -4 / - 4 Partial capture
10-18 06:03 80m - / - SP5EXA +21 / - 6 Partial capture
10-18 06:02 80m - / - DK7ZT 0 / - 5 Partial capture
10-18 06:00 80m -4 / - F1PSX -17 / - 4 ✓ Closing observed
10-18 05:57 80m 0 / -10 RN2F +2 / -4 4 ✓ Full exchange observed
10-18 05:54 80m - / -3 MI0OBC -15 / - 2 Partial capture
10-18 05:53 80m - / - ON4MAP -14 / - 2 Partial capture
10-18 05:51 80m -3 / - G4OZG - / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
123330  -9 2704  GB5SJ F4FVW -07
145515 -16  893  GB5SJ G0OYQ -17 (x3)
150800  +8 2818  GB5SJ DL0PS -16 (x2)
183345  -6  715  GB5SJ DK5IR RR73
184900 -13  693  GB5SJ DK2MAX -18 (x6)
191430  -6 2938  GB5SJ OH4NDU -15 (x2)
80m 
UTC    dB Audio  Message
070145 -15 1972  EB5AFK GB5SJ IO81
070645  -9 1392  GB5SJ DL1FAM +12 (x2)
072145 -10 1389  GB5SJ SP1IWC -17 (x4)
080745  -6  826  GB5SJ DK7ZT +05
081915 -23 1304  GB5SJ F5PZT JN38 (x7)

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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