KD2UPB — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FN31

Receiver-side FT8 activity involving KD2UPB, decoded by SO8OO in southeastern Poland. 67 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 13 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-10-21.

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 67 FT8 messages attributed to KD2UPB as the transmitting token by decoded message structure across 13 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (48%), followed by 40 m (46%) and 80 m (6%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-15 dB

Estimated median S/N

Bands

80m · 4 40m · 31 20m · 32

First attributed message: 2026-06-11
Last attributed message: 2026-10-21 23:38 UTC

Observed FT8 message patterns

Attributed sample: 67 messages
Active dates: 13 UTC dates
Estimated median S/N: -15 dB
Estimated 10th-90th percentile: -22 to -9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 28, moderate (-15 to -9 dB) 36, strong (≥ -8 dB) 3.

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 KD2UPB in decoded directed-looking exchanges:

9K2GR · Kuwait KW9U · United States MM0GTU · Scotland N5FMP · United States TJ1GD · Cameroon UN0GY · Kazakhstan 9A9TT · Croatia F5MSE · France F5NBU · France G8KHF · England GM4HYG · Scotland IK6DLK · Italy

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 KD2UPB

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: FN31 · 24 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 6,913 km (approx.)
Last such locator decoded: 2026-10-10 23:59 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 UTC	Band	KD2UPB S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-26 23:13	80m	- / -14	DK7ZT	+11 / -	5	✓ Closing fragment
10-21 23:05	80m	- / -11	UX5UO	+27 / -	3	Partial capture
09-07 23:55	40m	- / -21	EA8CDG	-4 / -	3	Partial capture
09-07 23:49	40m	- / +8	K1BZ	-4 / -	2	✓ Closing fragment
08-27 00:44	20m	-20 / -15	YV6BXN	-19 / 0	3	Partial capture
08-27 00:26	20m	- / -8	KP4QVQ	-22 / -	4	Partial capture
08-27 00:24	40m	- / -	DJ0MAB	-10 / -	3	Partial capture
08-24 22:37	20m	-14 / -	N5FMP	- / -7	3	✓ Closing fragment
08-24 22:28	20m	-16 / -6	TJ1GD	-10 / -7	3	✓ Full exchange observed
08-24 00:55	40m	-20 / -13	UR8MB	+14 / -	3	✓ Closing observed
08-24 00:52	40m	- / -	W1IP	-16 / -	2	✓ Closing fragment
08-24 00:47	40m	-15 / -	KI5POE	- / -4	2	✓ Closing fragment
08-24 00:42	40m	- / +9	N8NZM	-16 / -	2	✓ Closing fragment
08-24 00:36	40m	- / -	KA1MR	-11 / -	4	✓ Closing fragment
08-24 00:30	40m	-15 / -	K1LNF	- / -6	2	✓ Closing fragment
08-24 00:27	40m	-16 / -	K4WYC	- / -8	4	✓ Closing fragment
08-24 00:20	40m	- / +5	KC1WNO	-7 / -	2	✓ Closing fragment
08-24 00:16	40m	-10 / -	N1TQP	-2 / -	4	✓ Closing observed
08-23 00:52	40m	- / -12	DJ0MAB	0 / -	4	Partial capture
08-22 00:45	40m	- / -12	9A9TT	-7 / -	3	✓ Closing fragment
08-22 00:42	40m	- / -	F6FDY	-13 / -	3	Partial capture
08-22 00:39	40m	-16 / -11	IK6DLK	-6 / -15	8	✓ Full exchange observed
08-22 00:36	40m	-10 / -9	G8KHF	-10 / -	3	✓ Closing observed
08-22 00:34	40m	-9 / -	DB4SNK	- / -13	3	Partial capture
08-22 00:28	40m	-9 / -3	GM4HYG	-10 / -	5	✓ Closing observed
08-22 00:27	40m	-12 / -	SA3LEN	- / -16	2	✓ Closing fragment
08-21 00:23	20m	-14 / +3	9K2GR	+10 / -	3	✓ Closing observed
08-20 00:02	20m	- / -20	CE3RKW	-3 / -	3	Partial capture
08-20 00:02	20m	- / -	IK4LZH	+2 / -	3	Partial capture
08-19 00:23	40m	- / -	V26K	0 / -	2	✓ Closing fragment
08-19 00:14	40m	- / -10	F5MSE	-13 / -	3	✓ Closing fragment
08-18 23:55	40m	- / -6	F5NBU	-10 / -	3	✓ Closing fragment
08-15 19:04	20m	- / -1	MM0GTU	-11 / -	2	✓ Closing fragment
08-12 00:52	80m	- / -	W1LBM	-19 / -	2	✓ Closing fragment
08-12 00:42	80m	- / -20	DO8JB	+10 / -	6	Partial capture
08-10 00:22	80m	- / -15	<...>	+12 / -	2	Partial capture
08-10 00:17	80m	- / -18	<...>	+8 / -	2	Partial capture
08-09 22:51	20m	- / -13	UN0GY	-15 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
004615  +4  426  KD2UPB DO8JB R-20
005245 -20  825  KD2UPB W1LBM R+12 (x2)
010600 -18 1128  HK3X KD2UPB FN31
235945 -24 1583  UT5EL KD2UPB FN31
001300 -19 1308  S53K KD2UPB -06
230500 +25  734  KD2UPB UX5UO R-11 (x3)
233845 -19 1554  K3ATA KD2UPB -01
231345  +7 1759  KD2UPB DK7ZT -14 (x5)

40m

UTC    dB Audio  Message
005200 -17 1801  KD2UPB W1IP +17 (x2)
005545 +12 2601  KD2UPB UR8MB -13 (x2)
005630 -20 1376  UR8MB KD2UPB 73
002415  -9 1685  KD2UPB DJ0MAB JN49 (x3)
002530 -23 1683  KP4QVQ KD2UPB FN31
234915  -4  494  KD2UPB K1BZ +08 (x2)
235515  -6 1753  KD2UPB EA8CDG -21 (x3)
234115 -17 1460  EA8CZ KD2UPB FN31

20m

UTC    dB Audio  Message
222915 -18 1415  TJ1GD KD2UPB 73
223445 -15 1414  KW9U KD2UPB 73
223545 -14 1669  WB6NAH KD2UPB -12
223745 -17 1669  N5FMP KD2UPB -07 (x3)
225315 -24 1482  KD2UPB EA5W IM97
002645 -21 1919  KD2UPB KP4QVQ -08 (x4)
004330 -19 1530  KP4QVQ KD2UPB FN31
004445 -19 1488  KD2UPB YV6BXN -15
004500 -22 1530  YV6BXN KD2UPB 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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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