Why SSIM files fail quietly — and why validation matters
An SSIM schedule can be wrong without ever raising an error. What goes wrong in real files, what it costs downstream, and why validation has to come first.
Active Flights · Blog
#data-quality
3 articles tagged #data-quality.
Articles
Overnight flights and the day that changes
A red-eye departs one day and lands the next. SSIM encodes that with a day offset — and the 2400-vs-0000 midnight edge — which naive time handling turns into negative block times and arrivals before departure.
The data-quality edge cases that break schedule parsers
A field guide to the real-world quirks in SSIM feeds — time modes, overnight arrivals, DST, operational suffixes, season edges — that turn a 'simple' fixed-width parser into a maintenance treadmill.