CS5AIRA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Portugal

Receiver-side FT8 activity involving CS5AIRA, decoded by SO8OO in southeastern Poland. 501 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 10 UTC dates in the available aggregate history. Observed between 2026-07-11 and 2026-09-18.

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 501 FT8 messages attributed to CS5AIRA as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (93%), followed by 40 m (7%). Most decodes (75%) fell within the six-hour window 18:00-00:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (81%); the estimated median was -19 dB.

Overview

501
Messages attributed
10
UTC dates decoded
97
Active 15-min windows
-19 dB
Estimated median S/N

Bands

40m · 37 20m · 464
First attributed message: 2026-07-11
Last attributed message: 2026-09-18 20:23 UTC

Observed FT8 message patterns

Attributed sample
501 messages
Active dates
10 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) 404, moderate (-15 to -9 dB) 92, 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 CS5AIRA 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 UTCBandCS5AIRA S/NCounterpartCounterpart S/NMsgsCapture
09-18 20:27 40m - / +4 F4HXJ -3 / - 2 Partial capture
09-18 20:22 40m - / -12 F4HXJ -4 / - 2 Partial capture
09-17 20:36 40m - / -5 LX1JH +9 / - 2 Partial capture
09-17 20:27 40m -16 / - <...> -2 / - 3 ✓ Closing fragment
09-17 19:32 40m - / -13 YO4NF +4 / - 2 Partial capture
09-17 19:17 40m - / -13 IU8RFW -6 / - 6 Partial capture
09-17 19:10 40m - / -16 M0BEW -1 / - 3 Partial capture
09-17 18:58 40m - / - <...> +2 / - 4 ✓ Closing fragment
09-17 18:57 40m -15 / -15 R2BIN 0 / -11 3 Partial capture
09-17 18:19 40m -18 / - RX3ASQ - / -14 3 Partial capture
09-17 18:18 40m - / -15 S53AK +4 / - 11 Partial capture
09-17 17:55 40m - / -15 DG3DAF -3 / - 6 Partial capture
07-24 12:46 10m - / - <...> -9 / - 2 ✓ Closing fragment
07-24 12:13 10m - / - <...> -10 / - 2 ✓ Closing fragment
07-24 09:36 20m - / - DL3MIB -8 / - 3 Partial capture
07-17 07:17 20m - / - <...> 0 / - 2 ✓ Closing fragment
07-17 06:24 20m -21 / - <...> -18 / - 3 ✓ Closing fragment
07-17 06:23 20m - / -23 4O4DB -20 / - 4 Partial capture
07-17 05:59 20m -22 / - LY1SR - / +3 2 Partial capture
07-16 23:56 20m -23 / - W3EWL - / -9 3 Partial capture
07-16 23:43 20m -15 / - W1BVT - / -20 2 Partial capture
07-16 21:29 20m -22 / - <...> - / - 2 ✓ Closing fragment
07-16 19:22 20m -13 / - <...> - / - 2 ✓ Closing fragment
07-16 19:16 20m -10 / - DL7UHD - / -14 3 Partial capture
07-16 19:07 20m -16 / - JR4GPA - / -12 2 Partial capture
07-16 19:02 20m -16 / - <...> - / - 2 ✓ Closing fragment
07-16 08:52 40m - / - OK1DOL -6 / - 4 Partial capture
07-15 20:57 40m - / - <...> -18 / - 2 ✓ Closing fragment
07-15 20:43 40m - / - <...> -10 / - 2 ✓ Closing fragment
07-15 20:17 40m - / - RA3PS -16 / - 3 Partial capture
07-15 19:58 40m - / - <...> -3 / - 2 ✓ Closing fragment
07-15 09:45 20m - / - <...> -13 / - 2 ✓ Closing fragment
07-15 08:37 20m - / - EM90Z -10 / - 2 Partial capture
07-15 01:32 20m -23 / - <...> - / - 2 ✓ Closing fragment
07-14 22:51 20m -22 / - MM7FTH - / 0 2 Partial capture
07-14 20:12 20m -16 / - <...> - / - 2 ✓ Closing fragment
07-14 19:43 20m -14 / - <...> -1 / - 3 ✓ Closing fragment
07-14 19:42 20m -10 / -13 RC6OU -1 / +2 4 Partial capture
07-14 19:07 20m -20 / - RU3QR - / -12 2 Partial capture
07-14 18:46 20m -18 / - <...> - / - 2 ✓ Closing fragment
07-13 04:33 40m - / - <...> -8 / - 2 ✓ Closing fragment
07-13 03:28 40m - / - <...> -23 / - 2 ✓ Closing fragment
07-13 02:26 40m - / - RA6ABC -6 / - 7 Partial capture
07-13 01:17 40m -24 / - <...> -21 / - 2 ✓ Closing fragment
07-13 00:36 40m - / -10 R4WZ -22 / - 2 Partial capture
07-12 20:52 20m - / -13 R9FAI -6 / - 3 Partial capture
07-12 19:38 20m -21 / - SP1ZMO - / -12 3 Partial capture
07-12 19:11 20m -17 / - G6ZRV -20 / -2 7 ✓ Closing observed
07-12 18:58 20m -19 / - SP6AMK - / -14 2 Partial capture
07-12 18:43 20m -20 / - PD3CF - / -3 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
203645 +12  929  CS5AIRA LX1JH R-05
203715  +5  929  CS5AIRA <...> 73
203815  -7  929  CS5AIRA IK5LWE JN53
204045  +1 2992  CS5AIRA <...> 73
215030 -15  931  <...> CS5AIRA RR73
215330 -15  931  SP9CVY CS5AIRA +01
215400 -12  931  <...> CS5AIRA RR73
215645  -5  931  CS5AIRA G0OFD JO02
193045  -9 2429  CS5AIRA IU4QQE JN64
201445  -6 2995  CS5AIRA F4HXJ IN87 (x3)
202315  -2 2995  SX48JM CS5AIRA 73
202745  -4 2995  CS5AIRA F4HXJ IN87 (x2)
10m 
UTC    dB Audio  Message
163830 -24 1741  CS5AIRA <...> 73 (x10)
123845  -4  951  CS5AIRA PD1UM JO30
124615 -13 1963  CS5AIRA <...> 73 (x4)
20m 
UTC    dB Audio  Message
194000 -20 1387  CQ CS5AIRA (x8)
091215  -1 1982  CS5AIRA <...> 73
093615  -8 1109  <CS5AIRA> DL3MIB JN57
093615 -22 1500  CS5AIRA <...> 73
093645  -5 1109  CS5AIRA DL3MIB JN57 (x2)
094345 -14  957  CS5AIRA <...> 73 (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.

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