{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<h1>Read VIIRS SDR data, resample, and make a true color RGB image</h1>\n",
    "\n",
    "Created with:\n",
    "\n",
    "Package | Version\n",
    "--- | ---\n",
    "SatPy | 0.9.0\n",
    "PyResample | 1.10.1\n",
    "Trollimage | 1.5.3\n",
    "PyKdtree | 1.3.1\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "from satpy.scene import Scene\n",
    "from glob import glob"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "/home/a000680/.local/lib/python2.7/site-packages/h5py/__init__.py:36: FutureWarning: Conversion of the second argument of issubdtype from `float` to `np.floating` is deprecated. In future, it will be treated as `np.float64 == np.dtype(float).type`.\n",
      "  from ._conv import register_converters as _register_converters\n"
     ]
    }
   ],
   "source": [
    "scn = Scene(\n",
    "        filenames=glob(\"/home/a000680/data/polar_in/direct_readout/npp/lvl1/npp_20150420_1202_18019/*\"),\n",
    "        reader='viirs_sdr')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "from satpy.resample import get_area_def"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "areaid = 'eurol'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [],
   "source": [
    "areadef = get_area_def(areaid)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [],
   "source": [
    "composite = 'true_color_lowres'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [],
   "source": [
    "scn.load([composite])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [],
   "source": [
    "newscn = scn.resample(areadef)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<trollimage.xrimage.XRImage at 0x7f9ba408e250>"
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "newscn.show(composite)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "<img src='true_color_rayleigh_only_201504201203_eurol_thumb.png'/>"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [],
   "source": [
    "prfx = newscn.start_time.strftime('%Y%m%d%H%M')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "/home/a000680/.local/lib/python2.7/site-packages/dask/local.py:271: RuntimeWarning: invalid value encountered in less\n",
      "  return func(*args2)\n",
      "/home/a000680/.local/lib/python2.7/site-packages/dask/local.py:271: RuntimeWarning: invalid value encountered in log10\n",
      "  return func(*args2)\n"
     ]
    }
   ],
   "source": [
    "newscn.save_dataset(\n",
    "        composite, './true_color_rayleigh_only_{0}_{1}.png'.format(prfx, areaid))"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 2",
   "language": "python",
   "name": "python2"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 2
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython2",
   "version": "2.7.5"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}