SP7UPL — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: JO91

Receiver-side FT8 activity involving SP7UPL, decoded by SO8OO in southeastern Poland. 49 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-13 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 49 FT8 messages attributed to SP7UPL as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (45%), followed by 40 m (29%) and 20 m (27%). 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 strong S/N range (90%); the estimated median was +13 dB.

Overview

49
Messages attributed
3
UTC dates decoded
6
Active 15-min windows
+13 dB
Estimated median S/N

Bands

80m · 22 40m · 14 20m · 13
First attributed message: 2026-06-13
Last attributed message: 2026-08-29 20:18 UTC

Observed FT8 message patterns

Attributed sample
49 messages
Active dates
3 UTC dates
Estimated median S/N
+13 dB
Estimated 10th-90th percentile
-9 to +23 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 44.

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 SP7UPL in decoded directed-looking exchanges:

Most frequent locator attributed to SP7UPL

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
JO91 · 13 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
262 km (approx.)
Last such locator decoded
2026-08-29 20:17 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 UTCBandSP7UPL S/NCounterpartCounterpart S/NMsgsCapture
08-29 20:17 80m +21 / - UN8DSW - / -8 4 ✓ Closing fragment
08-29 20:13 80m +24 / -5 EA6LU -12 / -6 5 ✓ Full exchange observed
08-29 20:11 80m +23 / - RK9DO - / -5 3 ✓ Closing fragment
08-29 20:09 80m +17 / - 7A5ZMN - / - 2 Partial capture
08-29 20:08 80m +20 / -2 LZ2VQ +4 / +2 4 ✓ Full exchange observed
08-29 20:07 80m +20 / - 9A4ZM +8 / - 5 ✓ Full exchange observed
08-29 20:06 80m +18 / - UA4FKT +12 / - 4 ✓ Full exchange observed
08-29 20:05 80m +16 / +4 DL5PC +3 / +3 4 ✓ Full exchange observed
08-08 18:36 20m - / -10 IK4LZH -4 / - 4 Partial capture
08-08 18:36 20m - / - IQ4JO -8 / - 2 Partial capture
07-23 18:27 40m +6 / - IZ8PPI - / 0 2 ✓ Closing fragment
07-23 18:26 40m +7 / - F5LMJ - / -8 2 ✓ Closing fragment
07-23 18:22 40m +12 / - BD7OH - / -13 2 ✓ Closing fragment
07-23 18:21 40m +12 / -2 DL9KM -12 / +9 8 ✓ Full exchange observed
07-23 18:21 40m - / - US2UM +8 / - 2 Partial capture
07-23 18:20 40m +6 / - VK2WN - / -3 2 ✓ Closing fragment
07-23 18:06 20m - / - RC5F -13 / - 2 Partial capture
07-23 17:59 20m - / -11 YO4NF +1 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
200945 +15  402  7A5ZMN SP7UPL JO91 (x2)
201130 +24  402  RK9DO SP7UPL JO91 (x3)
201330 +24  402  EA6LU SP7UPL JO91
201345 -11 1863  SP7UPL EA6LU -05
201400 +22  402  EA6LU SP7UPL R-06
201415 -13 1862  SP7UPL EA6LU RR73
201430 +26  402  EA6LU SP7UPL 73
201545 +12  402  RI1FJL SP7UPL JO91
201700 +20  402  UN8DSW SP7UPL JO91 (x4)
20m 
UTC    dB Audio  Message
175915  -1  477  SP7UPL YO4NF -11 (x2)
180615 -11 1194  SP7UPL RC5F KO85 (x2)
181545 -23 1751  SP7UPL MI5JYK IO74
183615  -5 2656  SP7UPL IQ4JO JN63
183615  -4  462  SP7UPL IK4LZH JN54
183645 -10 2655  SP7UPL IQ4JO JN63
183645  -9  462  SP7UPL IK4LZH R-10 (x3)
40m 
UTC    dB Audio  Message
182145  +7  438  SP7UPL US2UM KO50
182145 -10 1346  SP7UPL DL9KM JN68
182200  +9  438  BD7OH SP7UPL R-13
182215 -11 1346  SP7UPL DL9KM JN68
182230 +14  438  BD7OH SP7UPL 73
182245 -11 1346  SP7UPL DL9KM JN68
182300 +13  438  DL9KM SP7UPL +09
182315 -13 1346  SP7UPL DL9KM R-02
182330 +11  438  DL9KM SP7UPL RR73
182345 -12 1346  SP7UPL DL9KM 73
182430 +11  438  BD4XGP SP7UPL RR73
182600  +8  438  F5LMJ SP7UPL -08 (x2)
182730  +5  438  IZ8PPI SP7UPL R+00 (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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