KM4IOA — 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: EM74

Receiver-side FT8 activity involving KM4IOA, decoded by SO8OO in southeastern Poland. 16 FT8 messages attributed to this token as transmitter, on 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-20 and 2026-08-25.

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 16 FT8 messages attributed to KM4IOA as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -16 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-16 dB

Estimated median S/N

Bands

20m · 16

First attributed message: 2026-06-20
Last attributed message: 2026-08-25 06:25 UTC

Observed FT8 message patterns

Attributed sample: 16 messages
Active dates: 3 UTC dates
Estimated median S/N: -16 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 0.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with KM4IOA in decoded directed-looking exchanges:

DL3MIB · Fed. Rep. of Germany ×2 HI8UD · Dominican Republic ×2 PI4DX · Netherlands ×2 V31DL · Belize ×2 5B4AMX · Cyprus 9K2MP · Kuwait F6FDY · France GM3AND · Scotland HK3C · Colombia HK3YL · Colombia KP2B · US Virgin Islands PC2J · Netherlands

Most frequent locator attributed to KM4IOA

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: EM74 · 9 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,198 km (approx.)
Last such locator decoded: 2026-08-23 02:49 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	KM4IOA S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-17 03:36	80m	- / -	SN40KZE	+13 / -	3	✓ Closing fragment
09-17 03:36	80m	- / -	US2YW	+8 / -	3	Partial capture
08-27 22:43	20m	- / -7	HK3C	0 / -	2	✓ Closing fragment
08-26 08:35	20m	- / -17	G3XLF	-2 / -	2	Partial capture
08-26 07:24	20m	- / -10	OS4K	-2 / -	3	Partial capture
08-26 07:23	20m	- / +2	V31DL	-8 / -	2	✓ Closing fragment
08-25 07:47	20m	- / -	F5SZB	-14 / -	2	Partial capture
08-25 07:40	20m	- / -	PC5L	-8 / -	3	Partial capture
08-25 07:24	20m	- / -20	PC2J	-9 / -	3	✓ Closing fragment
08-25 06:59	20m	- / -15	DL3MIB	+11 / -	6	✓ Closing fragment
08-25 06:41	20m	- / -11	DL3MIB	+5 / -	5	✓ Closing fragment
08-25 06:24	20m	-13 / -14	GM3AND	+4 / -	3	✓ Closing observed
08-24 04:05	20m	- / -4	5B4AMX	+2 / -	4	✓ Closing fragment
08-23 22:33	20m	- / -	OK2CNI	-10 / -	10	Partial capture
08-23 22:02	20m	- / +4	W1HQL	-19 / -	6	✓ Closing fragment
08-23 05:53	20m	- / -	F6FDY	-15 / -	2	✓ Closing fragment
08-23 05:27	20m	- / -	R7AZ	+11 / -	3	Partial capture
08-23 04:06	20m	- / -5	EN35UKR	-12 / -	2	Partial capture
08-23 04:05	20m	- / -	OD5KU	+18 / -	2	Partial capture
08-23 04:04	20m	- / -8	US2YW	-18 / -	2	✓ Closing fragment
08-23 04:01	20m	- / -	R2EC	-11 / -	2	Partial capture
08-23 02:46	20m	-15 / -	9K2MP	- / -	5	Partial capture
08-23 00:31	20m	-16 / -14	9K2MP	-10 / -12	8	✓ Full exchange observed
08-21 23:06	20m	- / -7	V31DL	-9 / -	7	✓ Closing fragment
08-21 04:31	20m	- / -8	TI5RR	-14 / -	6	✓ Closing fragment
08-20 21:02	20m	- / -	EA3IDY	-8 / -	6	Partial capture
08-15 03:35	20m	- / -	UN7LEW	-12 / -	2	✓ Closing fragment
08-15 03:28	20m	- / -12	UN7LEW	-8 / -	8	Partial capture
08-12 06:18	20m	- / -	IU6QLJ	-13 / -	2	Partial capture
08-12 04:06	20m	- / -15	LZ1ZF	-6 / -	2	Partial capture
08-05 22:38	20m	- / -13	PI4DX	-20 / -	2	✓ Closing fragment
07-26 03:24	20m	- / -12	HK3YL	-16 / -	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
033615  +6 2124  KM4IOA US2YW KN28
033615 +11  788  <KM4IOA> SN40KZE 73
033645  +9 2124  KM4IOA US2YW KN28
033700 +12  788  KM4IOA SN40KZE
033715  +9 2124  KM4IOA US2YW KN28
033730 +16  788  KM4IOA SN40KZE

20m

UTC    dB Audio  Message
074145 +12 1310  KM4IOA GB64MOD -22
074745 -14 1828  KM4IOA F5SZB IN95 (x2)
072315  -9 1281  KM4IOA V31DL +02 (x2)
072445  -5 2013  KM4IOA OS4K -10 (x3)
081000 -12 2330  KM4IOA M7PHE IO93
082100  -6 2162  KM4IOA M8GGQ -07
083515  -4 1843  KM4IOA G3XLF -17 (x2)
222315 -17 1127  KM4IOA CS8ABF -06
224315  -5 1129  KM4IOA HK3C -07 (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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