Graham McIntire
dea407c8ca
ERA5 (Copernicus CDS API): - Era5Profile schema matching HRRR profile structure for interop - Era5Client with async job submission, polling, GRIB2 download - Era5FetchWorker (Oban queue: era5, max_attempts: 5) - Unified lookup: Weather.best_profile_for_contact/1 tries HRRR first, falls back to ERA5 for pre-2014 contacts RTMA (NOAA S3, 2.5km/15-min): - RtmaObservation schema for surface-only fields - RtmaClient with byte-range GRIB2 requests (same pattern as HRRR) - RtmaFetchWorker (Oban queue: rtma, max_attempts: 10) - Weather.find_nearest_rtma/3 for surface condition lookup Both queues added to production Oban config (2 workers each).
69 lines
2.1 KiB
Elixir
69 lines
2.1 KiB
Elixir
defmodule Microwaveprop.Workers.Era5FetchWorker do
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@moduledoc """
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Fetches ERA5 reanalysis profiles for contacts where HRRR data is unavailable.
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Primarily for pre-2014 contacts that predate HRRR availability.
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"""
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use Oban.Worker, queue: :era5, max_attempts: 5
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alias Microwaveprop.Repo
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alias Microwaveprop.Weather.Era5Client
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alias Microwaveprop.Weather.Era5Profile
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require Logger
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@impl Oban.Worker
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def backoff(%Oban.Job{attempt: attempt}) do
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# ERA5 CDS API can be slow; generous backoff
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min(300 * Integer.pow(2, attempt - 1), _one_day = 86_400)
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end
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@impl Oban.Worker
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def perform(%Oban.Job{args: %{"lat" => lat, "lon" => lon, "valid_time" => valid_time_str}}) do
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{:ok, valid_time, _} = DateTime.from_iso8601(valid_time_str)
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rlat = Float.round(lat * 4) / 4
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rlon = Float.round(lon * 4) / 4
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if has_era5_profile?(rlat, rlon, valid_time) do
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Logger.debug("ERA5: profile already exists for #{rlat},#{rlon} @ #{valid_time_str}")
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:ok
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else
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Logger.info("ERA5: fetching profile for #{rlat},#{rlon} @ #{valid_time_str}")
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case Era5Client.fetch_profile(lat, lon, valid_time) do
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{:ok, attrs} ->
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%Era5Profile{}
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|> Era5Profile.changeset(attrs)
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|> Repo.insert(
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on_conflict: :nothing,
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conflict_target: [:lat, :lon, :valid_time]
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)
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Logger.info("ERA5: stored profile for #{rlat},#{rlon} @ #{valid_time_str}")
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:ok
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{:error, reason} ->
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Logger.warning("ERA5: failed for #{rlat},#{rlon} @ #{valid_time_str}: #{inspect(reason)}")
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{:error, reason}
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end
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end
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end
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defp has_era5_profile?(lat, lon, valid_time) do
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import Ecto.Query
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dlat = 0.13
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dlon = 0.13
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time_start = DateTime.add(valid_time, -1800, :second)
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time_end = DateTime.add(valid_time, 1800, :second)
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Era5Profile
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|> where(
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[p],
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p.lat >= ^(lat - dlat) and p.lat <= ^(lat + dlat) and
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p.lon >= ^(lon - dlon) and p.lon <= ^(lon + dlon) and
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p.valid_time >= ^time_start and p.valid_time <= ^time_end
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)
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|> Repo.exists?()
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end
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end
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