{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Compute synchrotron curvature harmonic coefficients\n"
   ],
   "id": "eb6cb873e076"
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import numpy as np\n",
    "import healpy as hp\n",
    "from pathlib import Path"
   ],
   "id": "5141505c4e2c"
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "datadir=Path(\"data/\")\n",
    "output_dir = Path(\"production-data/synch\")\n",
    "output_dir_raw = output_dir / \"raw\""
   ],
   "id": "cb1010e83006"
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "output_nside = 8192"
   ],
   "id": "55fa7162464f"
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "output_lmax = min(int(2.5 * output_nside), 8192 * 2)"
   ],
   "id": "1a051f2d1256"
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### $a_{\\ell m}$"
   ],
   "id": "acf92cf96d6b"
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "alm = hp.read_alm(\n",
    "    output_dir_raw / f\"synch_curvature_alm_nside8192_lmax16384.fits\",\n",
    "    hdu=1,\n",
    ")"
   ],
   "id": "aa526bb3e073"
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "alm_clip = hp.almxfl(alm, np.ones(output_lmax + 1))\n",
    "del alm"
   ],
   "id": "a959a3d53294"
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "output_map = hp.alm2map(alm_clip.astype(np.complex128), nside=output_nside)"
   ],
   "id": "69ff7deddd4c"
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "output_filename = output_dir / f\"synch_curvature_nside{output_nside}.fits\""
   ],
   "id": "5ac6dc67d883"
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "hp.write_map(output_filename, output_map, dtype=np.float32, overwrite=True)"
   ],
   "id": "2a9fba3c8ebb"
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "from pysm3.utils import add_metadata"
   ],
   "id": "f7be29d0a6de"
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "add_metadata([output_filename], coord=\"G\", unit=\"\", ref_freq=\"23 GHz\", ell_max=str(output_lmax))"
   ],
   "id": "5dd2723b8631"
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "pycmb",
   "language": "python",
   "name": "pycmb"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.10.0"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 4
}