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2 commits

Author SHA1 Message Date
2defa3db7a
refactor: deduplicate helpers and simplify Scorer
- Unify haversine_km / deg_to_rad: Geo is the canonical home (atan2
  form for antipodal stability); Radio, common_volume, rain_scatter,
  ionosphere, terrain/srtm, terrain/elevation_client now delegate.
- Drop safe_min/safe_max wrappers in favor of Enum.min/max defaults.
- Move parse_float / parse_int to MicrowavepropWeb.LiveHelpers; eme,
  path, and rover LiveViews import from there.
- Extract MicrowavepropWeb.LocationResolver from the eme/path
  resolve_source / resolve_location duplicate. Standardize the kind
  key and "Invalid grid square" error message.
- Convert Scorer cond chains (humidity, td_depression, sky, wind,
  rain, pwat, pressure) to multi-clause guarded defs, matching the
  existing classify_time_period style.
- extract_profile_fields uses a named map accumulator instead of a
  6-tuple; build_path_conditions guards on %{temps: []} / %{dewpoints: []}.
- Collapse scores_file clamp/3 to max |> min.
- humidity_effect_label lives in BandConfig; map_live and path_live
  both use it.
2026-04-28 14:14:34 -05:00
33f5d4edbe
feat(rainscatter): classify QSO propagation mechanism from common-volume radar
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 %).
2026-04-17 15:57:59 -05:00