2 commits

Author	SHA1	Message	Date
Graham McIntire	51e390959c	Add dialyzer specs and types across the codebase ... 277 @spec/@type annotations added to 58 files covering all public APIs: contexts (propagation, radio, weather, terrain, beacons, commercial), GRIB2 decoders, terrain analysis, duct detection, rain scatter, CSV/ADIF import, weather clients, and all Ecto schemas. Dialyzer passes with 0 errors.	2026-04-12 08:55:04 -05:00
Graham McIntire	3ea2548114	Phase 8: 5-minute METAR ingestion pipeline ... NCEI ASOS 5-minute data client (Weather.NceiMetarClient): - fetch/3 pulls per-station monthly .dat files from NCEI C00418 - parse/1 decodes the fixed-width METAR format including precise T-group temperatures (T02110094 → 21.1/9.4°C) - metar_5min_observations table: schema-identical to surface_observations, separate table to avoid mixing cadences Weather.recent_surface_obs/3 prefers 5-min data when available, falls back to the hourly surface_observations table. Data URL: https://www.ncei.noaa.gov/data/automated-surface-observing-system-five-minute/access/YYYY/MM/asos-5min-KXXX-YYYYMM.dat Available back to 1996.	2026-04-10 08:53:54 -05:00