AeroGlobe: appendix

Static data pipeline · snapshot notes

These notes support the AeroGlobe case study and describe the 23 October 2026 snapshot. They are a scope record, not a live status page.

Pipeline stages

Stage	Input	Output
Normalize	OpenSky state vectors or adsb.lol day files	One record shape
Segment	Normalized observations	Per-aircraft tracks and flights
Chunk	Flights	Hourly JSON chunks with a size limit
Catalog	Chunks	The manifest the browser loads

Data sources

Source	Use	Terms
OpenSky snapshots	A few real observations for the live demo	OpenSky terms; rate-limited
adsb.lol daily files	Full historical days, built on the owner’s machine	ODbL, © adsb.lol contributors
Generated fixtures	Deterministic offline tests and the labeled sample day	Project code

A full global day needs about 10 GB of disk and roughly 6 GB of RAM at build time.

Built versus planned at the snapshot

Built	Planned, not built
Globe client with search, filters and flight cards	A published real historical day
Playback, track replay and trails	Off-main-thread decoding and a transport bar
Static pipeline, catalog and hourly chunks	Inferred routes and a time-zone overlay
OpenSky snapshot and fixture commands	Per-aircraft history and a browser logbook
Reference airport, airline and time-zone tables	—

Snapshot counts

The case study lists 395 passing tests in 42 files, about 5,800 lines of TypeScript, and a clean lint, type-check and production build. Those are the 23 October 2026 figures; they are not a current passing-test total.

Reproduce

npm install
DATA_SOURCE=fixtures npm run build     # offline, deterministic sample data
npm run build:check

The live deployment is built from the gh-pages branch; the repository documents the build-time snapshot fallback and the optional data branch.