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.
43 lines
1.4 KiB
Elixir
43 lines
1.4 KiB
Elixir
defmodule Microwaveprop.Weather.Metar5minObservation do
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@moduledoc """
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5-minute ASOS/METAR observations from NCEI (C00418).
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Schema-identical to `SurfaceObservation` but stored in a separate
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table to avoid mixing cadences and preserve backward compatibility
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for existing queries against the hourly feed.
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"""
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use Ecto.Schema
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import Ecto.Changeset
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@primary_key {:id, :binary_id, autogenerate: true}
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@foreign_key_type :binary_id
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schema "metar_5min_observations" do
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belongs_to :station, Microwaveprop.Weather.Station
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field :observed_at, :utc_datetime
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field :temp_f, :float
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field :dewpoint_f, :float
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field :relative_humidity, :float
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field :wind_speed_kts, :float
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field :wind_direction_deg, :integer
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field :sea_level_pressure_mb, :float
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field :altimeter_setting, :float
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field :sky_condition, :string
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field :precip_1h_in, :float
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field :wx_codes, :string
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timestamps(type: :utc_datetime)
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end
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@required_fields ~w(station_id observed_at)a
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@optional_fields ~w(temp_f dewpoint_f relative_humidity wind_speed_kts wind_direction_deg sea_level_pressure_mb altimeter_setting sky_condition precip_1h_in wx_codes)a
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def changeset(observation, attrs) do
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observation
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|> cast(attrs, @required_fields ++ @optional_fields)
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|> validate_required(@required_fields)
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|> foreign_key_constraint(:station_id)
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|> unique_constraint([:station_id, :observed_at])
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end
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end
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