VK3JMA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Australia Most frequent locator attributed to this token: QF21

Receiver-side FT8 activity involving VK3JMA, decoded by SO8OO in southeastern Poland. 163 FT8 messages attributed to this token as transmitter, on 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-16 and 2026-08-29.

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 163 FT8 messages attributed to VK3JMA as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (70%); the estimated median was -19 dB.

Overview

163
Messages attributed
4
UTC dates decoded
18
Active 15-min windows
-19 dB
Estimated median S/N

Bands

20m · 163
First attributed message: 2026-06-16
Last attributed message: 2026-08-29 05:44 UTC

Observed FT8 message patterns

Attributed sample
163 messages
Active dates
4 UTC dates
Estimated median S/N
-19 dB
Estimated 10th-90th percentile
-23 to -13 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 114, moderate (-15 to -9 dB) 49, strong (≥ -8 dB) 0.

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 VK3JMA 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 VK3JMA

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
QF21 · 127 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
15,433 km (approx.)
Last such locator decoded
2026-08-29 05:44 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 UTCBandVK3JMA S/NCounterpartCounterpart S/NMsgsCapture
09-07 21:29 40m - / - S51UN -2 / - 2 Partial capture
09-07 20:57 40m - / -20 LZ1CRI +5 / - 3 Partial capture
09-07 17:47 40m - / - G4RWD -9 / - 8 Partial capture
09-07 17:41 40m - / -18 UW5ESX +2 / - 3 ✓ Closing fragment
09-07 17:37 40m - / -18 UW5ESX 0 / - 2 Partial capture
09-07 15:30 40m - / -19 SM5XGQ -5 / - 5 ✓ Closing fragment
09-04 06:15 40m - / - PD0WL -12 / - 3 Partial capture
08-29 08:19 20m - / - DL0KS -20 / - 2 Partial capture
08-29 08:16 20m - / -5 OE9WJH 0 / - 2 ✓ Closing fragment
08-29 08:13 20m - / - DL0KS -16 / - 2 Partial capture
08-29 08:09 20m - / - HB9IUP -15 / - 3 Partial capture
08-29 08:06 20m - / - IU1TKQ -2 / - 4 Partial capture
08-29 08:05 20m - / -13 ON9DC -13 / - 3 Partial capture
08-29 08:04 20m - / - IK2SYK -15 / - 2 Partial capture
08-29 08:01 20m - / -13 ON9DC -22 / - 2 Partial capture
08-29 07:50 20m - / - IZ2FTR -4 / - 10 Partial capture
08-29 07:45 20m - / - IZ2FTR +1 / - 3 Partial capture
08-29 07:41 20m - / - PD4JOH -24 / - 2 Partial capture
08-29 07:39 20m - / - IZ2FTR -8 / - 5 Partial capture
08-29 07:28 20m - / -22 IK1JMJ -18 / - 2 Partial capture
08-29 07:17 20m - / -15 MW0DNF -10 / - 4 Partial capture
08-29 07:01 20m - / - I4BMJ -2 / - 2 Partial capture
08-29 06:43 20m - / -15 DL1GKH -8 / - 9 ✓ Closing fragment
08-29 06:27 20m - / - YO3GCL -4 / - 2 Partial capture
08-29 06:10 20m - / - RU4LM -12 / - 4 Partial capture
08-29 06:09 20m - / - YO7LPM -6 / - 3 Partial capture
08-29 06:08 20m - / - SV2KBB -20 / - 2 Partial capture
08-29 06:08 20m - / - YO3GCL 0 / - 12 Partial capture
08-29 06:06 20m - / - OZ1GYO -4 / - 2 Partial capture
08-29 06:02 20m - / - YO3GCL -5 / - 3 Partial capture
08-29 06:02 20m - / - YO8FC +12 / - 2 Partial capture
08-29 06:02 20m - / - OZ1GYO -4 / - 3 Partial capture
08-29 05:59 20m - / - YO3GCL -5 / - 3 Partial capture
08-29 05:58 20m - / - YT5KD -8 / - 7 Partial capture
08-29 05:46 20m - / - R6LKG -12 / - 2 Partial capture
08-29 05:42 20m - / -23 YO7LPM +1 / - 8 Partial capture
08-29 05:41 20m - / - SV0LS -10 / - 3 Partial capture
08-29 05:37 20m - / - RU4LM -12 / - 2 Partial capture
08-29 05:24 20m - / - LZ3SD -16 / - 2 Partial capture
08-29 05:22 20m - / - R7OV -12 / - 4 Partial capture
08-29 05:21 20m - / - R6LKG -12 / - 2 Partial capture
08-29 05:17 20m - / - YO6FFW +16 / - 2 Partial capture
08-29 05:13 20m - / - RM8L -16 / - 2 Partial capture
08-29 05:08 20m -13 / - E74A - / - 5 Partial capture
08-29 05:06 20m - / - RM8L -4 / - 3 Partial capture
08-29 05:00 20m - / - R6LKG -12 / - 2 Partial capture
08-29 05:00 20m - / - R6ZEJ -7 / - 2 Partial capture
08-29 04:57 20m - / - YO4CAI +8 / - 2 Partial capture
08-29 04:51 20m - / -17 ER3ZW -3 / - 3 Partial capture
08-29 04:46 20m - / - RM8L -2 / - 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
174130  +3 2757  VK3JMA UW5ESX R-18 (x2)
174700 -17 1638  VK3JMA G4RWD IO92 (x8)
205700  +2 2194  VK3JMA LZ1CRI KN22 (x3)
212930  -5 1343  VK3JMA S51UN JN75 (x2)
20m 
UTC    dB Audio  Message
080700 -14 2420  VK3JMA ON9DC -13
080700  +1 2369  VK3JMA IU1TKQ JN45
080730 -15 2420  VK3JMA ON9DC -13
080730  -5 2369  VK3JMA IU1TKQ JN45
080900 -17 2072  VK3JMA HB9IUP JN46
080915  -3 2369  VK3JMA IU1TKQ JN45
080930 -20 2073  VK3JMA HB9IUP JN46 (x2)
081200  -2  937  VK3JMA ON1KF JO11
081330 -14 1564  VK3JMA DL0KS JN39 (x2)
081630  +0 1880  VK3JMA OE9WJH R-05 (x2)
081930 -24 1564  VK3JMA DL0KS JN39 (x2)
80m 
UTC    dB Audio  Message
182145  +7 1700  VK3JMA UA6BRD LN05
182515  +4 1894  VK3JMA UT5ZC KN57 (x4)
191215  -5 1946  VK3JMA 4Z5AV -01 (x2)
194945  +3 2492  VK3JMA R3HH KO95 (x3)
201515 +11 1948  VK3JMA SP3PLD JO72 (x3)
183800  +2 2696  VK3JMA LA2VRA JO48 (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.

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