Lab / input layer

Label the recording.

Import audio, choose the channel to analyse, and inspect the 5–800 Hz spectrogram. Lay a timeline of silence, Doppler curves and indifference, then draw the curves directly on the frequency view. Below, stage 02 groundwork confirms the search country and window, accepts the daily country exports, and previews the resolved locations.

Stage 01 · inputStage 02 · groundworkUKLocal files

Audio sourceNo audio

Drop a recording

WAV, MP3, M4A, OGG or FLAC. Decoded locally; never uploaded.

00:00.000 / 02:40.000

8004002001005020105

Import audio to start labelling

Silence Curve Indifference 5–800 Hz

Move the playhead, then add a section · drag dividers · drag curve points

Selected section

Indifference

2 min 40 s00:00.000 – 02:40.000

Start (s)End (s)

Duration02:40.000

Type

Unlabelled or uncertain. The matcher should neither require nor exclude an aircraft here.

Section 1 of 1

Import

Drop a recording and choose the channel to analyse.

Label

Silence, curve or indifference. Add sections at the playhead.

Shape

Drag the curve points on the spectrogram, then export.

Stage 02 · searchGroundwork · simulated

Load the sky. Then solve.

Confirm the country and search window, then drop the daily country exports. A later pass will fetch them from jsDelivr; for now, local files are enough to preview the result.

Search briefWindow ready

Country

Window (UTC)

2026-11-04 00:00:00

→ 2026-11-04 23:59:59

Curve targets

Data mode

Local

Future source

https://…/package@2026-11-04/GB.jsonl.gz

One file per country-date. The jsDelivr fetch comes later.

Data files

Drop country files here

GB.jsonl.gz · one per country-date

Multiple files allowed · local only

0 files · 0 B · GB · 2026-11-04

Simulated run · results are illustrative