HF45OA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Poland

Receiver-side FT8 activity involving HF45OA, decoded by SO8OO in southeastern Poland. 279 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-16 and 2026-07-20.

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 279 FT8 messages attributed to HF45OA as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (52%), followed by 20 m (48%). Most decodes (53%) fell within the six-hour window 04:00-10:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (80%); the estimated median was -19 dB.

Overview

279
Messages attributed
5
UTC dates decoded
59
Active 15-min windows
-19 dB
Estimated median S/N

Bands

40m · 146 20m · 133
First attributed message: 2026-07-16
Last attributed message: 2026-07-20 15:40 UTC

Observed FT8 message patterns

Attributed sample
279 messages
Active dates
5 UTC dates
Estimated median S/N
-19 dB
Estimated 10th-90th percentile
-24 to -12 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 224, moderate (-15 to -9 dB) 50, strong (≥ -8 dB) 5.

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 HF45OA 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.

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 UTCBandHF45OA S/NCounterpartCounterpart S/NMsgsCapture
07-19 18:56 40m -22 / - <...> -14 / - 3 ✓ Closing fragment
07-19 18:34 40m -20 / - <...> -12 / - 5 ✓ Closing fragment
07-19 18:00 20m -24 / - <...> +3 / - 2 ✓ Closing fragment
07-19 16:09 20m - / - <...> -15 / - 3 ✓ Closing fragment
07-19 09:02 20m - / - HA5BGG -8 / - 4 Partial capture
07-19 09:02 20m -20 / - <...> -7 / - 2 ✓ Closing fragment
07-19 08:46 20m -20 / - <...> -20 / - 2 ✓ Closing fragment
07-19 07:16 20m -14 / - <...> -9 / - 2 ✓ Closing fragment
07-19 07:07 20m -15 / - <...> - / - 2 ✓ Closing fragment
07-19 06:46 20m -13 / - <...> -5 / - 2 ✓ Closing fragment
07-19 06:33 20m -13 / - <...> -12 / - 3 ✓ Closing fragment
07-19 06:22 20m -15 / - <...> -12 / - 5 ✓ Closing fragment
07-19 05:49 40m -22 / - <...> -9 / - 2 ✓ Closing fragment
07-19 05:49 40m - / - SP3IPA -12 / - 2 Partial capture
07-19 04:55 40m -24 / - <...> -4 / - 2 ✓ Closing fragment
07-19 04:36 40m -21 / - <...> -18 / - 5 ✓ Closing fragment
07-19 04:28 40m -21 / - <...> -16 / - 2 ✓ Closing fragment
07-19 04:11 40m - / - <...> -9 / - 2 ✓ Closing fragment
07-19 04:11 40m - / -14 OE6JVE -10 / - 2 Partial capture
07-18 18:47 40m -20 / - <...> - / - 2 ✓ Closing fragment
07-18 06:09 20m - / -9 RX3DTN -11 / - 2 Partial capture
07-18 06:08 20m - / - <...> -6 / - 2 ✓ Closing fragment
07-18 06:08 20m - / - PA3EVY +2 / - 2 Partial capture
07-17 21:40 40m - / - <...> -10 / - 2 ✓ Closing fragment
07-17 21:28 40m -20 / - DL75WAU - / - 3 Partial capture
07-17 18:17 40m - / - OE3SGU -3 / - 3 Partial capture
07-17 18:03 40m -24 / - <...> -20 / - 2 ✓ Closing fragment
07-17 16:41 40m - / - <...> -18 / - 2 ✓ Closing fragment
07-17 16:41 40m - / - SQ9BDB -19 / - 6 Partial capture
07-16 19:08 40m - / -1 DK7ZT -20 / - 3 Partial capture
07-16 19:08 40m -17 / - <...> -6 / - 3 ✓ Closing fragment
07-16 18:45 40m - / -5 DK7ZT -18 / - 3 Partial capture
07-16 18:15 40m - / - <...> -16 / - 2 ✓ Closing fragment
07-16 12:04 20m - / - <...> -17 / - 2 ✓ Closing fragment
07-16 09:04 20m - / - <...> -16 / - 4 ✓ Closing fragment
07-16 08:21 20m - / - <...> -13 / - 3 ✓ Closing fragment
07-16 08:21 20m - / - IZ2SXZ -13 / - 3 Partial capture
07-16 06:42 20m - / - <...> -11 / - 2 ✓ Closing fragment
07-16 06:42 20m - / - I1RJP -5 / - 4 Partial capture
07-16 06:24 40m -21 / - <...> -9 / - 2 ✓ Closing fragment
07-16 06:21 40m -24 / - <...> -17 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
184615 -23 1429  CQ HF45OA (x3)
185615 -23 1429  <...> HF45OA RR73 (x2)
185745 -17 1429  CQ HF45OA
185900 -14 1428  HF45OA <...> 73
185915 -16 1430  CQ HF45OA
190115 -11 1429  <...> HF45OA RR73
190145 -13 1429  CQ HF45OA (x5)
154145 -16 1503  HF45OA <...> 73
20m 
UTC    dB Audio  Message
180030  +3 1317  HF45OA <...> 73
180115 -24 1317  <...> HF45OA RR73
180215 -24 1316  CQ HF45OA
180400 -12 1317  HF45OA <...> 73
180445 -18 1317  CQ HF45OA (x6)
131330 -11 1835  HF45OA <...> 73 (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.

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