UB1API — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Locator transmitted in a decoded message: KP50

Receiver-side FT8 activity involving UB1API, decoded by SO8OO in southeastern Poland. 132 related FT8 messages, observed on 160m, 80m, 40m, 20m, 10m, across 28 UTC dates. Heard between 2026-05-18 and 2026-08-16.

These are automated observations at the SO8OO receiver, not the station's official logbook. Times are UTC. Decoder S/N describes messages received at SO8OO; inferred entity and location data may be inaccurate for portable, remote or special-event operation.

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

Overview

132
Related messages
0
CQ messages
28
UTC dates heard
-7 dB
Mean decoder S/N

Bands

First seen: 2026-05-18
Last seen: 2026-08-16 16:26 UTC

Activity Heatmap

Locator transmitted by UB1API

Approximate centre of KP50, decoded 2026-08-16 18:24 UTC. A transmitted locator is not proof of the operator's permanent location.

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 UTCBandUB1API S/NCounterpartCounterpart S/NMsgsCapture
08-16 18:28 80m +4 / - RV0APH - / -13 2 ✓ Closing fragment
08-16 18:24 80m 0 / - RA0SCA -14 / - 3 ✓ Closing observed
08-16 18:17 40m -18 / - UA6YEX - / -21 2 ✓ Closing fragment
08-16 12:26 20m - / -1 UA3GDJ -21 / - 2 ✓ Closing fragment
08-15 18:24 40m -18 / - UA1ZQN - / -4 2 ✓ Closing fragment
08-15 18:17 40m - / - RA3DA -16 / - 2 ✓ Closing fragment
08-02 20:00 160m -8 / - R1NW -6 / -5 6 ✓ Full exchange observed
08-02 19:55 80m -4 / - RK9UM - / -10 4 Partial capture
08-02 19:51 40m -15 / -8 UD7G -4 / -13 3 ✓ Full exchange observed
08-02 11:12 20m - / +6 R50RKZ -5 / - 2 ✓ Closing fragment
07-30 20:10 160m -7 / -15 R2LAF/P -17 / -15 4 Partial capture
07-29 19:38 40m - / - RU3OZ -10 / - 2 ✓ Closing fragment
07-29 19:35 40m -18 / - RW4YD - / -8 2 Partial capture
07-24 13:25 10m -20 / - R3PLA - / -14 2 ✓ Closing fragment
07-20 10:21 10m - / +2 RU3GF -18 / - 2 Partial capture
07-16 19:42 80m +2 / - UA6EU -9 / -22 2 ✓ Closing observed
07-16 19:38 80m 0 / - R8CKD - / - 2 Partial capture
07-15 20:14 160m -14 / - EW1TA - / -13 3 Partial capture
07-15 20:13 160m -12 / - R1QBQ - / -1 3 ✓ Closing fragment
07-15 20:10 160m -12 / -16 UI6L -2 / -6 5 ✓ Full exchange observed
07-15 20:08 160m -14 / -13 SP7ENW -5 / -20 5 ✓ Full exchange observed
07-15 20:07 160m -12 / -7 R6ML -12 / -11 4 ✓ Full exchange observed
07-15 20:05 160m -13 / - UD8S - / 0 3 ✓ Closing fragment
07-15 20:01 80m +4 / 0 RM5F +6 / +3 5 ✓ Full exchange observed
07-15 20:00 80m +2 / +1 UA3VVA -1 / -1 4 ✓ Full exchange observed
07-14 20:03 40m -19 / - UB9WPD - / -24 2 Partial capture
07-13 12:46 10m -22 / 0 RZ5D -3 / -1 4 ✓ Full exchange observed
07-09 17:53 80m -7 / - SP7MAZ - / -20 2 Partial capture
07-09 17:50 80m -9 / -13 UA9FGJ -11 / -2 5 ✓ Full exchange observed
07-08 20:09 160m -8 / - DM2HK - / -13 2 Partial capture
07-08 20:08 160m -19 / -3 R7CD +6 / +3 6 ✓ Full exchange observed
07-08 20:07 160m -5 / -6 RT2P -12 / -4 4 ✓ Full exchange observed
07-08 20:06 160m -7 / +2 DL9KM -16 / -14 5 ✓ Full exchange observed
07-08 20:05 160m -11 / -1 RZ3DW +4 / 0 5 ✓ Full exchange observed
07-08 20:04 160m -6 / - RA3TOS - / -12 2 ✓ Closing fragment
07-08 20:02 160m -9 / - R9DZ - / - 3 Partial capture
07-08 19:57 80m - / -2 R1BDX -13 / - 3 ✓ Closing fragment
07-08 19:56 80m - / -3 UC1Q +4 / - 2 ✓ Closing fragment
07-08 19:52 40m -17 / - RX4SA -13 / -12 2 ✓ Closing observed
07-08 13:22 10m - / -16 DN9AD -10 / - 2 Partial capture
07-08 13:17 10m - / +2 PE9JAN -15 / - 5 ✓ Closing fragment
07-07 18:34 80m -13 / -22 R9SAP -5 / -4 2 Partial capture
07-07 18:31 40m -16 / - R0WC - / - 2 Partial capture
06-14 08:39 10m -14 / - 7Q3CM - / - 2 Partial capture
06-12 07:52 10m - / -20 UA3SAO -7 / - 6 Partial capture
06-10 13:29 20m -10 / - R9JE +1 / -13 3 ✓ Closing observed
06-10 13:27 20m -15 / +1 UE7DR +5 / -6 3 ✓ Full exchange observed
06-10 13:26 20m -12 / -3 RD8O -10 / - 2 ✓ Closing observed
06-10 13:01 10m - / -9 5H1KB +4 / - 2 Partial capture
06-05 08:06 10m - / -8 RA9LL -19 / - 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
200230 +10  925  UB1API RM5F 73
193815  +1 1336  R8CKD UB1API KP50 (x2)
194245  +2 1336  UA6EU UB1API R-22
194300  -9  960  UB1API UA6EU RR73
195545  -7 1337  RK9UM UB1API KP50 (x4)
195930  -4 1136  UB1API RU6FK -05
182415  +3  335  RA0SCA UB1API KP50
182600 -14  705  UB1API RA0SCA RR73
182615  -3 1335  RA0SCA UB1API 73
182815  +3 1335  RV0APH UB1API R-13 (x2)
40m
UTC    dB Audio  Message
193530 -20 1371  RW4YD UB1API R-08
193800 -19 1370  R6FX UB1API RR73
193845  -9 2042  UB1API RU3OZ KO91 (x2)
200745 -16 1986  UB1API R3TIT -04
195100  -4 2839  UB1API UD7G -08
195115 -15 1369  UD7G UB1API R-13
195130  -4 2839  UB1API UD7G RR73
175145 -24 1368  RA4UIV UB1API KP50
181715 -17  983  UB1API RA3DA KO95 (x2)
182400 -18 1371  UA1ZQN UB1API R-04 (x2)
181700 -16 1369  UA6YEX UB1API R-21 (x2)
20m
UTC    dB Audio  Message
132600 -10 1569  UB1API RD8O -03
132645 -12 1408  RD8O UB1API 73
132730  +3 2862  UB1API UE7DR +01
132745 -15 1407  UE7DR UB1API R-06
132800  +7 2862  UB1API UE7DR RR73
132930  -8 1407  R9JE UB1API KP50 (x2)
133045  +1  546  UB1API R9JE RR73
085745 -21 1410  RQ7R UB1API KP50
130330 -24 1408  TF8KW UB1API KP50
115215 -20 1345  UB1API UD8S -06
111200  +2 2322  UB1API R50RKZ +06 (x2)
122600 -21 1408  UB1API UA3GDJ R-01 (x2)
160m
UTC    dB Audio  Message
201445 -12 1329  EW1TA UB1API KP50 (x3)
185430  +1 1572  UB1API RA3WAK -18
201030  -8 1329  R2LAF/P UB1API KP50 (x3)
201345 -17 2031  UB1API R2LAF/P R-15
200015  -7 1330  R1NW UB1API KP50 (x2)
200100 -10 1500  UB1API R1NW +13
200115  -8 1330  R1NW UB1API R-05
200130  -3 1500  UB1API R1NW RR73
200145 -11 1330  R1NW UB1API 73
211330 -14 1329  OH0ERF UB1API R-09
10m
UTC    dB Audio  Message
132415 -10 2528  UB1API DN9AD R-16
124645  +0  776  UB1API RZ5D KN75
124700 -22 1418  RZ5D UB1API -01
124715  -4  776  UB1API RZ5D R+00 (x2)
124930 -22 1418  R4UA UB1API -14
125045  -2 1330  UB1API <...> +01
125600 -23 1417  RW4F UB1API RR73
181145  -6  494  UB1API RX9WN RR73
055200 -19 1421  UA6EED UB1API R+03
102115 -19 1419  UB1API RU3GF +02 (x2)
132215 -20 1420  RW9HSB UB1API KP50
132545 -22 1419  R3PLA UB1API -14 (x2)

Decoder S/N history by band

Daily averages across messages associated with this profile as decoded at SO8OO.