JA7JPZ — 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: PM98

Receiver-side FT8 activity involving JA7JPZ, decoded by SO8OO in southeastern Poland. 109 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, across 18 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-11-04.

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 109 FT8 messages attributed to JA7JPZ as the transmitting token by decoded message structure across 18 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (86%), followed by 160 m (12%) and 40 m (2%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

109
Messages attributed
18
UTC dates decoded
34
Active 15-min windows
-10 dB
Estimated median S/N

Bands

160m · 13 80m · 94 40m · 2
First attributed message: 2026-06-13
Last attributed message: 2026-11-04 21:47 UTC

Observed FT8 message patterns

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

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 23, moderate (-15 to -9 dB) 43, strong (≥ -8 dB) 43.

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 JA7JPZ 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 JA7JPZ

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
PM98 · 63 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,423 km (approx.)
Last such locator decoded
2026-11-04 21:47 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 UTCBandJA7JPZ S/NCounterpartCounterpart S/NMsgsCapture
11-04 21:17 160m - / -17 S58T +10 / - 2 ✓ Closing fragment
11-04 21:04 80m - / - 9A6OY -8 / - 4 Partial capture
11-04 21:02 80m -9 / - 2E0FHM - / - 3 Partial capture
11-04 21:01 80m -8 / - MM0JTV - / - 2 Partial capture
11-04 20:57 80m -6 / - CT2KNA - / - 2 Partial capture
11-04 20:55 80m -4 / - M6XZD - / - 3 Partial capture
11-04 20:53 80m - / - IS0BQE -3 / - 5 Partial capture
11-04 20:51 80m - / - DG5RN +11 / - 2 Partial capture
11-04 20:50 80m - / - RK6OQ +14 / - 6 Partial capture
11-04 20:50 80m -6 / -16 SV8TCK -1 / -19 6 ✓ Full exchange observed
11-04 20:50 80m -6 / -20 LY3CY +1 / -9 4 ✓ Full exchange observed
11-04 20:46 80m - / -21 S51SLO +3 / - 3 Partial capture
11-04 20:46 80m - / -6 DL1RNW -10 / - 3 Partial capture
11-04 20:32 80m - / - RK6OQ +4 / - 3 Partial capture
11-04 20:29 80m -6 / -11 9A5E +5 / -18 5 ✓ Full exchange observed
11-04 20:28 80m - / - OT4A +2 / - 3 Partial capture
11-04 20:27 80m -4 / -18 OM2WQ +9 / -20 13 Partial capture
11-04 20:26 80m -5 / -10 IK5SRB +14 / -11 5 ✓ Full exchange observed
11-04 20:24 80m -8 / - EI5DS - / - 4 Partial capture
11-02 21:07 160m - / -10 IS0BOZ -6 / - 3 ✓ Closing fragment
11-02 21:03 160m - / - DJ1OJ -9 / - 2 Partial capture
11-02 21:02 160m - / -6 IT9VCE -1 / - 2 ✓ Closing fragment
11-02 20:30 80m -18 / - UA9XL/P - / - 3 Partial capture
11-02 19:33 80m - / -13 LY1DY -2 / - 7 Partial capture
11-02 19:19 80m - / - OM1AIT +8 / - 13 Partial capture
11-02 19:18 80m - / -6 LY3PW -22 / - 2 Partial capture
11-02 19:17 80m - / - OM3CND +2 / - 2 Partial capture
11-02 19:17 80m - / - R3PMV -16 / - 2 Partial capture
11-02 19:17 80m -9 / - SV1QEW -6 / -19 2 Partial capture
11-02 19:15 80m -8 / -3 OZ1ADL -8 / -15 6 ✓ Full exchange observed
11-02 19:15 80m - / - OM2WQ +3 / - 10 Partial capture
11-02 19:13 80m - / - DF5AU +22 / - 4 Partial capture
11-02 19:13 80m - / -17 S58T +6 / - 3 Partial capture
11-02 19:10 80m -11 / -12 LY3I -10 / -23 10 ✓ Full exchange observed
11-01 21:01 80m - / -3 Z34K -6 / - 4 ✓ Closing fragment
11-01 21:00 80m -13 / -18 A92AE -14 / - 3 Partial capture
11-01 21:00 80m - / - R3VA 0 / - 8 Partial capture
11-01 19:26 80m - / - R3PLA 0 / - 2 Partial capture
11-01 19:26 80m - / - RC6OG -7 / - 3 Partial capture
11-01 19:25 80m - / - R6FX -5 / - 2 Partial capture
11-01 19:24 80m - / - R2AX -10 / - 2 Partial capture
11-01 19:23 80m -9 / -10 R7HL -2 / - 7 ✓ Closing observed
11-01 19:22 80m - / - YO9FQT -2 / - 10 Partial capture
11-01 19:22 80m - / - OK2CLW +9 / - 5 Partial capture
11-01 19:21 80m - / -15 ES2AJ +3 / - 3 Partial capture
11-01 19:21 80m - / - RA3QUA +12 / - 2 Partial capture
11-01 19:20 80m - / -9 Z62NS 0 / - 4 ✓ Closing fragment
11-01 19:16 80m - / -24 GI4SNA +6 / - 2 Partial capture
11-01 19:16 80m - / - S57BDM +6 / - 2 Partial capture
11-01 19:16 80m -14 / - Z62NS - / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
205645  -3  467  M6XZD JA7JPZ PM98
205745  -8  467  CT2KNA JA7JPZ PM98 (x2)
210100  -6  437  MM0JTV JA7JPZ PM98 (x2)
210200 -11  437  2E0FHM JA7JPZ PM98 (x3)
210400  -8 2437  JA7JPZ 9A6OY JN83
210415  +6  271  JA7JPZ SP3EK JO82
210430 -10 2438  JA7JPZ 9A6OY JN83 (x3)
210645  +0 2651  JA7JPZ IS0BQE JN40
214745 -11 2880  M6XZD JA7JPZ PM98
160m 
UTC    dB Audio  Message
200515 -11 1981  JA7JPZ LB1RJ JO49 (x3)
203245  +8 2712  JA7JPZ HB9OAB -25 (x2)
210215  +0 1531  JA7JPZ IT9VCE -06 (x2)
210315 -13 1688  JA7JPZ DJ1OJ JN58 (x2)
210730  -3 1291  JA7JPZ IS0BOZ JM49 (x3)
211630  +8 2322  JA7JPZ RU3GF -17
211700 +11 1908  JA7JPZ S58T -17 (x2)
40m 
UTC    dB Audio  Message
204830  -7  944  JA7JPZ UT5ZC KN57
211400  -8 2450  JA7JPZ PD0HLA JO22 (x2)
210615 +17 2799  JA7JPZ OE3HPT JN77 (x5)
20m 
UTC    dB Audio  Message
111830 -17 1006  JA7JPZ ON6AA JO11 (x2)
10m 
UTC    dB Audio  Message
102300 -12 1149  JA7JPZ IT9LKX -14
102900 -17 2121  JA7JPZ II7MGBT -24
103030 -15 1204  JA7JPZ DN9DSP -15 (x5)

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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