Graham McIntire
95351a2358
LiveView page for analyzing microwave propagation between two points. Features: - Source/destination input: callsign (via gridmap.org API) or Maidenhead grid - Band selector for all 8 microwave bands (10-241 GHz) - Leaflet map showing path line (reuses ContactMap hook) - Terrain elevation cross-section (reuses ElevationProfile hook) - Link summary: distance, bearing, terrain verdict - Loss budget: FSPL + O2 + H2O + rain + diffraction - Propagation score with 10-factor breakdown - Current atmospheric conditions from path-integrated HRRR New CallsignClient for gridmap.org location lookup. Navigation links added to main navbar and map control panel.
37 lines
1.1 KiB
Elixir
37 lines
1.1 KiB
Elixir
defmodule Microwaveprop.Radio.CallsignClient do
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@moduledoc "Looks up amateur radio callsign locations via gridmap.org."
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@doc """
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Fetch location for a callsign. Returns {:ok, %{callsign, gridsquare, lat, lon}} or {:error, reason}.
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"""
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def locate(callsign) do
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url = "https://gridmap.org/locate/#{URI.encode(callsign)}"
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case Req.get(url, req_options() ++ [receive_timeout: 10_000]) do
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{:ok, %{status: 200, body: %{"latitude" => lat, "longitude" => lon} = body}} when is_number(lat) ->
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{:ok,
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%{
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callsign: body["callsign"] || callsign,
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gridsquare: body["gridsquare"],
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lat: lat,
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lon: lon
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}}
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{:ok, %{status: 200, body: _}} ->
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{:error, "callsign not found"}
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{:ok, %{status: 404}} ->
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{:error, "callsign not found"}
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{:ok, %{status: status}} ->
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{:error, "gridmap.org HTTP #{status}"}
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{:error, reason} ->
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{:error, "gridmap.org failed: #{inspect(reason)}"}
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end
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end
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defp req_options do
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Application.get_env(:microwaveprop, :callsign_req_options, [])
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end
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end
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