Graham McIntire
33f5d4edbe
Adds a per-contact enrichment pipeline that determines whether a QSO was
most likely carried by rain scatter, tropospheric ducting, or ordinary
troposcatter — using IEM n0q composite reflectivity sampled inside the
lens-shaped intersection of 400 km-radius disks around each endpoint.
Pieces:
* Microwaveprop.Propagation.CommonVolume — lens geometry (haversine,
in-CV test, bbox, area).
* contact_common_volume_radar table (1:1 per contact) storing
aggregate dBZ stats inside the CV + radar_status column on contacts.
* Microwaveprop.Workers.CommonVolumeRadarWorker — Oban :radar queue,
fetches the n0q frame at QSO time, iterates pixels inside the CV
bbox, aggregates rain/heavy/core-pixel counts, max/mean dBZ, and
coverage percentage.
* Microwaveprop.Propagation.RainScatterClassifier — rule-based mapper
from (band, distance, radar stats, duct flags) to one of
:likely_rainscatter | :rainscatter_possible | :tropo_duct |
:troposcatter | :unknown.
* ContactWeatherEnqueueWorker learns a :radar enrichment type and
enqueues the CV worker on contact submission; pre-2014 contacts
(outside IEM n0q coverage) are pinned to :unavailable.
* `mix radar_backfill` bulk-enqueues historical contacts with
--year / --limit / --dry-run.
* Contact detail page renders a mechanism badge with supporting
stats (common-volume area, max dBZ, heavy-rain pixel count,
coverage %).
36 lines
1.2 KiB
Elixir
36 lines
1.2 KiB
Elixir
defmodule Microwaveprop.Repo.Migrations.CreateContactCommonVolumeRadar do
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use Ecto.Migration
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def change do
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create table(:contact_common_volume_radar, primary_key: false) do
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add :id, :binary_id, primary_key: true
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add :contact_id, references(:contacts, type: :binary_id, on_delete: :delete_all),
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null: false
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add :observed_at, :utc_datetime, null: false
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add :common_volume_km2, :float
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add :pixel_count, :integer, null: false, default: 0
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add :rain_pixel_count, :integer, null: false, default: 0
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add :heavy_rain_pixel_count, :integer, null: false, default: 0
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add :core_pixel_count, :integer, null: false, default: 0
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add :max_dbz, :float
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add :mean_dbz, :float
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add :coverage_pct, :float
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timestamps(type: :utc_datetime)
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end
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create unique_index(:contact_common_volume_radar, [:contact_id])
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create index(:contact_common_volume_radar, [:observed_at])
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alter table(:contacts) do
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add :radar_status, :string, null: false, default: "pending"
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end
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create index(:contacts, [:radar_status],
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where: "radar_status::text <> 'complete'::text",
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name: :contacts_radar_status_pending_index
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)
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end
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end
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