F4ISC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: IN93

Receiver-side FT8 activity involving F4ISC, decoded by SO8OO in southeastern Poland. 117 FT8 messages attributed to this token as transmitter, on 20m, across 8 UTC dates in the available aggregate history. Observed between 2026-07-18 and 2026-07-27.

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 117 FT8 messages attributed to F4ISC as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Most decodes (97%) fell within the six-hour window 12:00-18:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

117
Messages attributed
8
UTC dates decoded
26
Active 15-min windows
-12 dB
Estimated median S/N

Bands

20m · 117
First attributed message: 2026-07-18
Last attributed message: 2026-07-27 17:09 UTC

Observed FT8 message patterns

Attributed sample
117 messages
Active dates
8 UTC dates
Estimated median S/N
-12 dB
Estimated 10th-90th percentile
-18 to -6 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 24, moderate (-15 to -9 dB) 70, strong (≥ -8 dB) 23.

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 F4ISC 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 F4ISC

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
IN93 · 64 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,870 km (approx.)
Last such locator decoded
2026-07-27 17:09 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 UTCBandF4ISC S/NCounterpartCounterpart S/NMsgsCapture
07-27 16:58 20m -7 / - SP7CWZ - / -14 3 Partial capture
07-25 12:53 20m -15 / - M1GRY - / -10 2 Partial capture
07-25 12:34 20m -21 / - PD2WL -24 / -16 2 Partial capture
07-25 12:28 20m -10 / - G3ZQQ - / -17 3 Partial capture
07-25 08:51 20m - / -17 RN6MA +2 / - 2 ✓ Closing fragment
07-23 17:24 20m -5 / -16 R3KCW -14 / +2 9 ✓ Full exchange observed
07-23 17:18 20m -16 / - OH5KNL - / -3 2 Partial capture
07-22 17:17 20m -8 / - EX8BT - / - 4 Partial capture
07-22 09:14 20m - / -14 DK3HV -11 / - 5 ✓ Closing fragment
07-22 08:59 20m - / -8 DH3KR -16 / - 2 Partial capture
07-21 16:09 20m - / - F5HNQ -17 / - 3 ✓ Closing fragment
07-21 15:52 20m -12 / - TF3PPN - / -21 3 Partial capture
07-21 15:45 20m -8 / - DL6UM - / -19 2 Partial capture
07-21 15:15 20m - / - OE6TNO -8 / - 2 ✓ Closing fragment
07-21 13:38 20m - / -3 F5RRS -9 / - 3 ✓ Closing fragment
07-21 13:35 20m - / -15 IN3GHP -5 / - 4 ✓ Closing fragment
07-20 16:01 20m -10 / - DD8HG - / -13 4 Partial capture
07-20 15:56 20m -10 / - OK5AG/P - / +6 2 Partial capture
07-20 15:45 20m -12 / - VE2COK - / - 5 Partial capture
07-20 15:42 20m -14 / - RA9LL - / - 5 Partial capture
07-20 15:37 20m -18 / - UN7PTN - / - 2 Partial capture
07-20 15:28 20m -14 / -5 GJ0KYZ -4 / +2 3 ✓ Full exchange observed
07-19 17:46 20m - / - IU5HIU -9 / - 3 ✓ Closing fragment
07-19 17:10 20m - / -10 DL1UDO -16 / - 6 ✓ Closing fragment
07-18 15:27 20m -18 / - PD9JPV - / -20 2 Partial capture
07-18 15:17 20m -14 / - VK2LAW - / - 5 Partial capture
07-18 15:06 20m -13 / - DL1UDO -6 / -12 5 Partial capture
07-18 14:43 20m - / -15 F1PBZ -12 / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
124215 -18 2381  CQ F4ISC IN93 (x2)
125315 -16 2381  M1GRY F4ISC -10 (x2)
125645 -12 2381  CQ F4ISC IN93 (x2)
164445 -10 2422  PE1KDY F4ISC RRR
164700 -17 1397  F4ISC IZ2ACM 73
164945 -20 2422  5B4ARQ F4ISC IN93 (x2)
165815  -6 2621  SP7CWZ F4ISC -14 (x3)
170145 -13 2624  EX8ABR F4ISC IN93
170915 -11 2604  V51CO F4ISC IN93

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.

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