Graham McIntire
3ea2548114
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.
26 lines
915 B
Elixir
26 lines
915 B
Elixir
defmodule Microwaveprop.Repo.Migrations.CreateMetar5minObservations do
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use Ecto.Migration
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def change do
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create table(:metar_5min_observations, primary_key: false) do
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add :id, :binary_id, primary_key: true, null: false
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add :station_id, references(:weather_stations, type: :binary_id, on_delete: :delete_all)
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add :observed_at, :utc_datetime, null: false
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add :temp_f, :float
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add :dewpoint_f, :float
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add :relative_humidity, :float
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add :wind_speed_kts, :float
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add :wind_direction_deg, :integer
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add :sea_level_pressure_mb, :float
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add :altimeter_setting, :float
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add :sky_condition, :string
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add :precip_1h_in, :float
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add :wx_codes, :string
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timestamps(type: :utc_datetime)
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end
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create unique_index(:metar_5min_observations, [:station_id, :observed_at])
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create index(:metar_5min_observations, [:observed_at])
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end
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end
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