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 "cells": [
  {
   "cell_type": "markdown",
   "id": "eca6269f-0925-467f-9dfc-2baf2f102936",
   "metadata": {},
   "source": [
    "# Particle Size Distributions"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "4ad96665-60b8-46ba-ba1d-a91b215cff9b",
   "metadata": {},
   "outputs": [],
   "source": [
    "import numpy as np\n",
    "import os\n",
    "import pyarts3 as pyarts\n",
    "pyarts.arts.globals.parameters.datapath.append(\"/home/simon/data/arts-xml-data\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "0168afb8-3507-4810-82c3-a1e404b6ded3",
   "metadata": {},
   "outputs": [],
   "source": [
    "ws = pyarts.Workspace()\n",
    "ws.surface_fieldPlanet(option=\"Earth\")\n",
    "ws.surface_field[pyarts.arts.SurfaceKey(\"t\")] = 295.0\n",
    "ws.atmospheric_fieldRead(\n",
    "    toa=100e3, basename=\"planets/Earth/afgl/tropical/\", missing_is_zero=1\n",
    ")\n",
    "ws.atmospheric_fieldIGRF(time=\"2000-03-11 14:39:37\")"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "66e48730-7be6-4cfe-9ade-f287cd06068b",
   "metadata": {},
   "source": [
    "## Single-moment Modified Gamma Distribution"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "1251a55c-4fc4-4267-9963-a2d837668287",
   "metadata": {},
   "outputs": [],
   "source": [
    "from pyarts3.arts import MGDSingleMoment, ScatteringSpeciesProperty, ParticulateProperty, AtmPoint\n",
    "\n",
    "rain_first_moment = pyarts.arts.ScatteringSpeciesProperty(\"rain\", pyarts.arts.ParticulateProperty(\"MassDensity\"))\n",
    "psd = MGDSingleMoment(rain_first_moment, \"Field19\", 270, 300, False)\n",
    "\n",
    "point = AtmPoint()\n",
    "point[\"t\"] = 280\n",
    "point[rain_first_moment] = 1e-3\n",
    "\n",
    "sizes = np.logspace(-6, -3, 101)\n",
    "pnd = psd.evaluate(point, sizes, 1.0, 1.0)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "a9e1aad5-8ce9-45c2-b0f5-426de3f2913c",
   "metadata": {},
   "outputs": [],
   "source": [
    "import matplotlib.pyplot as plt\n",
    "plt.plot(sizes, pnd)\n",
    "plt.yscale(\"log\")\n",
    "plt.xscale(\"log\")\n",
    "plt.xlabel(\"Particle Size\")\n",
    "plt.ylabel(\"Particle Number Density\")"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "78fa74da-8d16-4350-bfdd-32ed7b47b4fc",
   "metadata": {},
   "source": [
    "## Binned particles size distribution"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "4a9a7083-3522-404a-81fe-4349d89ffcaa",
   "metadata": {},
   "outputs": [],
   "source": [
    "from pyarts3.arts import BinnedPSD, SizeParameter"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "2db75f97-5326-48c8-ad06-451839aa57cc",
   "metadata": {},
   "outputs": [],
   "source": [
    "bins = [1e-5, 1e-4, 1e-3]\n",
    "counts = [1e6, 1e3]\n",
    "psd = BinnedPSD(SizeParameter(\"DVeq\"), bins, counts, 273.15, 300)\n",
    "sizes = np.logspace(-6, -3, 101)\n",
    "pnd = psd.evaluate(point, sizes, 1.0, 1.0)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "aca6633d-73a9-432b-bfc3-5150f24f168c",
   "metadata": {},
   "outputs": [],
   "source": [
    "import matplotlib.pyplot as plt\n",
    "plt.plot(sizes, pnd)\n",
    "plt.yscale(\"log\")\n",
    "plt.xscale(\"log\")\n",
    "plt.xlabel(\"Particle Size\")\n",
    "plt.ylabel(\"Particle Number Density\")"
   ]
  }
 ],
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