SP9DOU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: JO90

Receiver-side FT8 activity involving SP9DOU, decoded by SO8OO in southeastern Poland. 515 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 18 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-08-28.

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 515 FT8 messages attributed to SP9DOU as the transmitting token by decoded message structure across 18 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (74%), followed by 80 m (25%) and 20 m (1%). Most decodes (84%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (76%); the estimated median was -3 dB.

Overview

515
Messages attributed
18
UTC dates decoded
54
Active 15-min windows
-3 dB
Estimated median S/N

Bands

80m · 128 40m · 381 20m · 6
First attributed message: 2026-06-07
Last attributed message: 2026-08-28 18:35 UTC

Observed FT8 message patterns

Attributed sample
515 messages
Active dates
18 UTC dates
Estimated median S/N
-3 dB
Estimated 10th-90th percentile
-16 to +7 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 59, moderate (-15 to -9 dB) 64, strong (≥ -8 dB) 392.

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 SP9DOU 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 SP9DOU

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
JO90 · 203 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
208 km (approx.)
Last such locator decoded
2026-08-28 18:35 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 UTCBandSP9DOU S/NCounterpartCounterpart S/NMsgsCapture
08-28 18:51 40m - / - SQ5ROB -4 / - 24 Partial capture
08-28 18:26 40m -2 / - EA5HM - / +2 6 Partial capture
08-28 18:24 40m +1 / -5 OE1AVO +4 / +6 5 ✓ Full exchange observed
08-28 18:21 40m 0 / +2 DK0ACI -8 / - 3 ✓ Closing observed
08-28 18:16 40m -5 / - EA5HM - / -2 7 Partial capture
08-28 18:11 40m 0 / +5 SP8PBP 0 / - 6 ✓ Full exchange observed
08-28 18:10 40m - / +4 SO8DAN -2 / - 2 ✓ Closing fragment
08-28 18:09 40m +2 / -1 SP6ZWD -4 / 0 11 ✓ Full exchange observed
08-28 18:08 40m 0 / - SQ5ROB -4 / +3 64 ✓ Closing observed
08-28 18:04 40m - / - SQ5ROB -4 / - 2 Partial capture
08-28 17:59 40m - / -7 SP6ZWD -2 / - 5 Partial capture
08-28 17:57 40m - / - SQ5ROB -2 / - 5 Partial capture
08-28 17:56 40m - / - SQ9PQK +2 / - 8 Partial capture
08-28 17:56 40m - / - SO8DAN 0 / - 2 Partial capture
08-28 17:55 40m - / - SP5YPL +8 / - 2 Partial capture
08-28 17:54 40m - / -7 SQ9OUG +6 / - 10 Partial capture
08-28 17:52 40m -2 / - SP6ZWD -1 / -12 8 Partial capture
08-28 17:52 40m 0 / +9 DL3AWB +13 / - 7 ✓ Full exchange observed
08-28 17:51 40m -2 / - SP6JKE -12 / -2 4 Partial capture
08-27 18:48 40m -18 / - IZ1ANZ -2 / - 2 ✓ Closing observed
08-27 18:45 40m -17 / - SP5WS - / -9 2 ✓ Closing fragment
08-27 18:42 40m - / - SO5A -14 / - 2 ✓ Closing fragment
08-27 18:34 40m -11 / - SP9AU -4 / -13 3 ✓ Closing observed
08-27 18:32 40m -1 / +8 SP9XG -6 / 0 5 ✓ Full exchange observed
08-27 18:25 40m - / - OK8CZ -3 / - 2 Partial capture
08-27 18:24 40m - / -2 DK5DW -4 / - 4 Partial capture
08-27 18:19 40m -8 / -10 UB1CBC -2 / +5 4 ✓ Full exchange observed
08-27 18:14 40m -6 / +6 OE8PIT -1 / -8 5 ✓ Full exchange observed
08-27 18:13 40m -2 / -20 SP6JKE -14 / -14 3 ✓ Full exchange observed
08-27 18:10 40m - / - OV5SP -24 / - 2 Partial capture
08-27 18:08 40m -4 / -6 SP7VLU -2 / - 4 ✓ Closing observed
08-27 18:03 40m -2 / -14 R1AV -13 / - 5 ✓ Closing observed
08-27 18:01 40m -3 / -11 RX3VF -10 / 0 5 ✓ Full exchange observed
08-27 18:01 40m - / -6 SQ2HCN -3 / - 5 ✓ Closing fragment
08-27 18:00 40m -4 / - HA1RJ +10 / - 2 Partial capture
08-27 17:56 40m -2 / -14 US1MM +3 / +4 8 ✓ Full exchange observed
08-27 17:54 40m -2 / - IZ4AIF +4 / +7 5 ✓ Full exchange observed
08-26 20:00 80m 0 / -7 LY1DY -15 / -18 8 Partial capture
08-26 19:54 80m +15 / +8 SO5A -10 / -8 6 ✓ Full exchange observed
08-26 19:54 80m +14 / -5 SQ5ROB -4 / -13 10 ✓ Full exchange observed
08-26 19:52 80m +13 / - S58MU -20 / -16 2 Partial capture
08-26 19:52 80m +17 / - SO8DAN - / -6 2 ✓ Closing fragment
08-26 19:48 80m - / - SO5A -14 / - 6 Partial capture
08-26 19:46 80m - / - SQ1QAT -2 / - 4 Partial capture
08-26 19:44 80m +8 / -7 SP7MTU -13 / -18 5 ✓ Full exchange observed
08-26 19:43 80m +6 / 0 SP7PGK -13 / - 4 ✓ Closing observed
08-26 19:40 80m +5 / - SP9WTC -5 / - 4 ✓ Closing observed
08-26 19:37 80m +5 / +7 SP9AU -2 / -12 4 ✓ Full exchange observed
08-26 19:36 80m +6 / - SP9XG - / -11 2 Partial capture
08-26 19:34 80m +6 / -11 SQ5TA +4 / 0 6 ✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
185830  -1 1539  SP9DOU SQ5ROB KO02 (x15)
80m 
UTC    dB Audio  Message
200200  +1 1430  LY1DY SP9DOU -18
200230  +0 1430  CQ SES SP9DOU JO90
200245 -17 1430  SP9DOU LY1DY R-05
200300  -6 1430  CQ SES SP9DOU JO90
200315 -14 1430  SP9DOU LY1DY R-05
200330  +1 1430  CQ SES SP9DOU JO90 (x2)
200415 -24 1430  SP9DOU OK1DBE JN69
200430  +1 1430  CQ SES SP9DOU JO90 (x7)
20m 
UTC    dB Audio  Message
192115  -7 1052  SP9DOU TA6MMI -03 (x2)
182500  -6 2272  SP9DOU M0WOO IO94 (x7)
183300  -8  764  SP9DOU RW4HB LO53
183530 -15 1957  SP9DOU TA2ED -12 (x2)
102330 +14  323  SP9DOU RA6OY KN88 (x3)
10m 
UTC    dB Audio  Message
132730 -16 1374  SP9DOU F4ASA -01 (x2)
132930  +1 1040  SP9DOU A71QQ -19
133745 -11  987  SP9DOU OD5JL -03
133830 -14 1727  SP9DOU PD1HPB JO22
133830 -14  987  SP9DOU OD5JL -03
133900 -14 1727  SP9DOU PD1HPB R-11
133915 -14  987  SP9DOU OD5JL -03
133930 -16 1727  SP9DOU PD1HPB 73
134600  -8 1726  SP9DOU ON4ASV 73

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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee