JH8SIT — 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: Japan Most frequent locator attributed to this token: QN03

Receiver-side FT8 activity involving JH8SIT, decoded by SO8OO in southeastern Poland. 200 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 18 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-23.

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 200 FT8 messages attributed to JH8SIT as the transmitting token by decoded message structure across 18 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (99%), followed by 40 m (1%). Most decodes (61%) fell within the six-hour window 14:00-20:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (63%); the estimated median was -5 dB.

Overview

200
Messages attributed
18
UTC dates decoded
33
Active 15-min windows
-5 dB
Estimated median S/N

Bands

40m · 2 20m · 198
First attributed message: 2026-06-07
Last attributed message: 2026-10-23 21:10 UTC

Observed FT8 message patterns

Attributed sample
200 messages
Active dates
18 UTC dates
Estimated median S/N
-5 dB
Estimated 10th-90th percentile
-16 to +2 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 25, moderate (-15 to -9 dB) 49, strong (≥ -8 dB) 126.

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 JH8SIT 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 JH8SIT

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
QN03 · 100 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,073 km (approx.)
Last such locator decoded
2026-10-23 21:10 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 UTCBandJH8SIT S/NCounterpartCounterpart S/NMsgsCapture
11-06 20:18 40m - / -17 RX6ATU -13 / - 5 Partial capture
11-05 21:06 40m - / -16 US5MUW +7 / - 3 ✓ Closing fragment
11-05 20:56 40m - / - IU5SCG -17 / - 2 Partial capture
11-05 20:51 40m - / -19 RO1M 0 / - 3 ✓ Closing fragment
11-02 20:33 40m - / - M9WDW -5 / - 9 Partial capture
11-02 20:26 40m - / -13 F5UKW +12 / - 4 ✓ Closing fragment
11-02 20:26 40m - / -8 4Z5OZ -8 / - 3 ✓ Closing fragment
10-29 20:46 40m - / -20 EA3URC -4 / - 5 ✓ Closing fragment
10-29 20:42 40m - / -11 SV1BLD +7 / - 3 ✓ Closing fragment
10-29 20:28 40m - / -15 EA3RT -6 / - 4 ✓ Closing fragment
10-29 20:26 40m - / -17 EB1LA -10 / - 4 Partial capture
10-29 20:07 40m - / - OH6LPK -1 / - 2 Partial capture
10-29 20:00 40m - / -9 M5BFL -2 / - 3 ✓ Closing fragment
10-29 19:57 40m - / - M5BFL -6 / - 2 Partial capture
10-29 19:56 40m - / -10 RX6ACR -12 / - 4 Partial capture
10-24 19:23 80m - / - EW6BZ +7 / - 4 Partial capture
10-24 19:21 80m - / -13 R6HV 0 / - 2 ✓ Closing fragment
10-07 21:28 40m - / -23 IK8UHA -13 / - 5 ✓ Closing fragment
10-07 21:28 40m - / -18 RV6AVU -7 / - 4 ✓ Closing fragment
10-06 20:41 40m - / - RD3FY -10 / - 4 Partial capture
10-06 20:32 40m - / - DF1OLS -6 / - 3 Partial capture
10-06 20:28 40m - / -20 R6SS -6 / - 4 Partial capture
10-06 20:27 40m - / - OK1UG -3 / - 4 Partial capture
10-04 14:30 40m - / - RA3GK -16 / - 4 Partial capture
10-04 14:24 40m - / - R6ZE -3 / - 3 Partial capture
09-29 14:55 40m - / -13 R5AV +2 / - 2 ✓ Closing fragment
09-29 14:53 40m - / -10 RD7LC -12 / - 2 ✓ Closing fragment
09-29 14:32 40m - / -13 RA3FD -6 / - 2 ✓ Closing fragment
08-31 13:16 20m - / - F4ETS +9 / - 3 Partial capture
08-31 13:13 20m - / - R6ADH -6 / - 2 ✓ Closing fragment
08-31 13:08 20m - / - G1SQB -3 / - 4 Partial capture
08-31 13:06 20m - / - OP4L -2 / - 6 Partial capture
08-31 12:57 20m - / +3 RU4D -10 / - 2 ✓ Closing fragment
08-31 12:53 20m - / - OP4L -4 / - 8 Partial capture
08-31 12:53 20m - / - G4SJG +8 / - 7 Partial capture
08-31 12:50 20m - / -15 PA3EZB +7 / - 3 ✓ Closing fragment
08-31 12:49 20m - / - G7LHK +4 / - 2 Partial capture
08-31 12:44 20m - / -1 OH8MXJ -12 / - 2 ✓ Closing fragment
08-30 21:28 20m - / - ME7IEB -5 / - 7 Partial capture
08-30 21:16 20m - / - G4EFE -4 / - 3 Partial capture
08-30 21:05 20m - / -14 ON5RZ -19 / - 3 ✓ Closing fragment
08-29 13:04 20m - / - PD3PAM -11 / - 3 Partial capture
08-29 08:45 20m - / - F4AWT -5 / - 3 Partial capture
08-28 13:21 20m - / -11 R6DYK -2 / - 3 ✓ Closing fragment
08-28 12:41 20m - / - DA1ST -8 / - 4 Partial capture
08-28 12:35 20m - / -9 RC6OG -10 / - 3 ✓ Closing fragment
08-28 12:29 20m - / -22 PD1SN -8 / - 2 Partial capture
08-28 12:10 20m - / - PE1KYP +12 / - 2 Partial capture
08-21 21:48 20m - / - IW1PVB -11 / - 5 Partial capture
08-21 21:46 20m - / -8 YL3KZ -9 / - 3 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
203730  +1 2713  JH8SIT M9WDW IO83
205100  +0  306  JH8SIT RO1M KO59 (x3)
205600 -17 1149  JH8SIT IU5SCG JN54 (x2)
210600 +11  303  JH8SIT US5MUW KN56 (x3)
201600  -8 2203  JH8SIT S55A JN65
201830 -13 1706  JH8SIT RX6ATU KN96 (x5)
80m 
UTC    dB Audio  Message
210445 +12  658  JH8SIT UW5KW KO30
192130  +0 1078  JH8SIT R6HV -13 (x2)
192300  +9  752  JH8SIT EW6BZ KO45 (x4)
151000 -11  542  JH8SIT RR73; RW1C <R8PG/P> +00
20m 
UTC    dB Audio  Message
130630  +1 1292  JH8SIT OP4L JO20 (x4)
130800  -1 1019  JH8SIT G1SQB JO02
130830  -2 1292  JH8SIT OP4L JO20
130830  -3 1019  JH8SIT G1SQB JO02 (x3)
131200 -12 2880  JH8SIT YO2HK KN16
131300  -3 2733  JH8SIT R6ADH KN94 (x2)
131630  +9 2732  JH8SIT F4ETS JN25 (x3)

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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