ES4RTK — 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: Estonia Most frequent locator attributed to this token: KO39

Receiver-side FT8 activity involving ES4RTK, decoded by SO8OO in southeastern Poland. 21 FT8 messages attributed to this token as transmitter, on 40m, across 7 UTC dates in the available aggregate history. Observed between 2026-10-07 and 2026-11-04.

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 21 FT8 messages attributed to ES4RTK as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). Several six-hour UTC windows tied for the largest share (90%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.

Overview

21
Messages attributed
7
UTC dates decoded
15
Active 15-min windows
-16 dB
Estimated median S/N

Bands

40m · 21
First attributed message: 2026-10-07
Last attributed message: 2026-11-04 17:24 UTC

Observed FT8 message patterns

Attributed sample
21 messages
Active dates
7 UTC dates
Estimated median S/N
-16 dB
Estimated 10th-90th percentile
-22 to -9 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 9, strong (≥ -8 dB) 1.

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 ES4RTK 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.

Most frequent locator attributed to ES4RTK

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
KO39 · 13 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,114 km (approx.)
Last such locator decoded
2026-11-04 17:24 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 UTCBandES4RTK S/NCounterpartCounterpart S/NMsgsCapture
11-04 18:08 80m - / -13 YL3AQI -7 / - 3 ✓ Closing fragment
11-04 17:16 40m - / -18 DJ1FH -6 / - 4 ✓ Closing fragment
11-01 18:01 40m - / -12 9A1CCB -2 / - 3 ✓ Closing fragment
11-01 17:58 40m - / -19 HB9HFJ +7 / - 6 ✓ Closing fragment
11-01 16:07 40m - / - S52D +9 / - 4 Partial capture
11-01 06:30 40m - / -18 CT7BRV -7 / - 5 ✓ Closing fragment
10-31 16:35 40m -16 / - UA4FEN - / -17 3 Partial capture
10-31 06:45 40m -23 / -16 US2YW +2 / - 5 ✓ Closing observed
10-31 06:42 40m - / -15 DL6UM -1 / - 6 ✓ Closing fragment
10-30 19:28 60m - / -22 DL3NGN -2 / - 6 Partial capture
10-30 19:24 60m - / -14 DB6FA -2 / - 4 Partial capture
10-30 19:22 60m - / -20 F5OWT -8 / - 2 ✓ Closing fragment
10-30 19:17 60m - / -18 YO9HP +10 / - 2 ✓ Closing fragment
10-30 19:10 60m - / -15 DK7UY +2 / - 2 Partial capture
10-30 19:01 60m - / -16 PC2J -16 / - 2 Partial capture
10-30 18:58 60m - / +1 OE8PIT +19 / - 3 ✓ Closing fragment
10-30 18:08 80m - / -25 DB100FT +2 / - 2 Partial capture
10-30 17:51 80m - / -25 DL1BFR +1 / - 3 ✓ Closing fragment
10-30 16:55 80m - / -19 EV1R +10 / - 2 ✓ Closing fragment
10-30 16:44 80m - / -22 DG1BRW -6 / - 3 Partial capture
10-30 16:38 80m - / -10 OZ5NJ +12 / - 3 ✓ Closing fragment
10-30 16:36 80m - / -20 RY3D +16 / - 2 ✓ Closing fragment
10-26 16:53 40m -7 / -15 DA1ST +16 / -6 3 ✓ Full exchange observed
10-26 16:39 40m - / -19 DH0BRO -14 / - 2 ✓ Closing fragment
10-26 16:28 60m - / +3 DM5CM -15 / - 4 Partial capture
10-26 16:23 60m - / -9 DD6ZV -5 / - 3 ✓ Closing fragment
10-26 16:22 60m - / -11 DK7ZT -9 / - 2 ✓ Closing fragment
10-26 16:19 60m - / -17 DL1CF -1 / - 5 ✓ Closing fragment
10-26 15:55 80m - / -4 OH3NXW -8 / - 2 ✓ Closing fragment
10-26 15:52 80m - / -1 LY1G +12 / - 2 ✓ Closing fragment
10-25 18:08 60m - / -13 SP9YGD -4 / - 2 ✓ Closing fragment
10-25 16:10 80m - / -17 OH5KNL +10 / - 4 ✓ Closing fragment
10-25 08:13 40m - / - F4BYA -1 / - 3 Partial capture
10-25 08:13 40m - / -20 UX7QV +3 / - 8 Partial capture
10-25 08:01 40m - / -9 SP4MPH +4 / - 2 ✓ Closing fragment
10-25 07:31 60m - / -12 SP2EWQ -2 / - 2 ✓ Closing fragment
10-25 07:12 40m - / -4 YL3AUR -6 / - 2 ✓ Closing fragment
10-25 07:08 40m - / -18 ES7KEW -15 / - 2 ✓ Closing fragment
10-08 18:52 40m - / - F4BYA +9 / - 4 Partial capture
10-08 17:37 40m -18 / - SV8NAJ - / - 2 Partial capture
10-08 15:16 40m - / -10 LB8TG -13 / - 2 ✓ Closing fragment
10-08 15:06 40m - / -14 DK6WH +5 / - 3 ✓ Closing fragment
10-08 14:53 40m - / -7 SP4BB 0 / - 2 ✓ Closing fragment
10-08 14:50 40m - / -16 DK6WH +10 / - 3 Partial capture
10-08 14:46 40m - / - DL2MED 0 / - 2 Partial capture
10-08 14:42 40m -13 / - SM5ACQ -19 / - 2 ✓ Closing observed
10-08 14:38 40m - / -10 EW4DX +10 / - 2 ✓ Closing fragment
10-07 16:34 40m - / -12 IU4PPL -4 / - 2 ✓ Closing fragment
10-07 16:33 40m - / -18 HB9ELE +12 / - 2 ✓ Closing fragment
10-07 16:29 40m - / -18 YO9PH -2 / - 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
164400  -6 2125  ES4RTK DG1BRW -22 (x3)
165530 +11  728  ES4RTK EV1R -19 (x2)
175115  +0 1763  ES4RTK DL1BFR JO32 (x3)
180800  -2 1201  ES4RTK DB100FT -25 (x2)
055845 -11 2718  ES4RTK LA1KUA -16
160030 +13 1707  ES4RTK LY2BVB -16
180845  -2 1497  ES4RTK YL3AQI KO16 (x3)
40m 
UTC    dB Audio  Message
175830  +5  730  ES4RTK HB9HFJ R-19 (x5)
180100  +2 2237  ES4RTK 9A1CCB JN85 (x3)
171615 -22 1790  CQ ES4RTK KO39
171630 -10 2242  ES4RTK DJ1FH JO52
171645 -21 1790  UN3P ES4RTK KO39
171700  -6 2242  ES4RTK DJ1FH JO52 (x3)
172415  -9 2998  CQ DX ES4RTK KO39
60m 
UTC    dB Audio  Message
191100  +4  477  ES4RTK DK7UY R-15
191745  +9  733  ES4RTK YO9HP -18 (x2)
192215  -6 2415  ES4RTK F5OWT -20 (x2)
192415  -1 2729  ES4RTK DB6FA R-14 (x4)
192815  -3 1807  ES4RTK DL3NGN JN59 (x6)

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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