Add initial FCI Level 1c NetCDF reader

build_environment.yml

@@ -15,6 +15,7 @@ dependencies:
   - fontconfig
   - freetype
   - gdal
+  - hdf5plugin
   - h5py
   - netcdf4
   - pillow

doc/source/conf.py

@@ -295,6 +295,7 @@ def setup(app):
             "readers/ahi_hsd.rst",
             "readers/ami_l1b.rst",
             "readers/glm_l2.rst",
+            "readers/fci_l1c_nc.rst",
             "verification/abi_verification.rst",
         ]
     )

doc/source/readers/fci_l1c_nc.rst

@@ -0,0 +1,28 @@
+FCI L1c NetCDF Reader
+=====================
+
+.. automodule:: polar2grid.readers.fci_l1c_nc
+    :noindex:
+
+Command Line Usage
+------------------
+
+.. argparse::
+    :module: polar2grid.readers.fci_l1c_nc
+    :func: add_reader_argument_groups
+    :prog: geo2grid.sh -r fci_l1c_nc -w <writer>
+    :passparser:
+
+Examples:
+
+.. code-block:: bash
+
+    geo2grid.sh -r fci_l1c_nc -h
+
+    geo2grid.sh -r fci_l1c_nc -w geotiff --list-products -f /data/mtg/fci
+
+    geo2grid.sh -r fci_l1c_nc -w geotiff --num-workers 8 -f /data/mtg/fci
+
+    geo2grid.sh -r fci_l1c_nc -w geotiff -p vis_04 vis_05 vis_06 vis_08 nir_13 nir_16 true_color -f W_XX*.nc
+
+    geo2grid.sh -r fci_l1c_nc -w geotiff --ll-bbox 10 -15 40 10 -f /fci_data

doc/source/readers/index.rst

@@ -37,3 +37,4 @@ using the  ``--list-products`` option.
     :geo2grid:ahi_hrit
     :geo2grid:ami_l1b
     :geo2grid:glm_l2
+    :geo2grid:fci_l1c_nc

polar2grid/compare.py

@@ -444,7 +444,7 @@ def compare_files(self, file1, file2, file_type=None, **kwargs):
 
     def compare_dirs(self, dir1, dir2, **kwargs) -> list[FileComparisonResults]:
         results = []
-        for expected_path in glob(os.path.join(dir1, "*")):
+        for expected_path in sorted(glob(os.path.join(dir1, "*"))):
             if expected_path.endswith(".log"):
                 continue
             test_path = os.path.join(dir2, os.path.basename(expected_path))

polar2grid/glue.py

@@ -34,6 +34,15 @@
 from datetime import datetime
 from typing import Optional, Union
 
+# isort: off
+# hdf5plugin must be imported before h5py and xarray or it won't be available
+# Used by the FCI reader
+try:
+    import hdf5plugin
+except ImportError:
+    hdf5plugin = None  # type: ignore
+# isort: on
+
 import dask
 import satpy
 from dask.diagnostics import ProgressBar

polar2grid/readers/fci_l1c_nc.py

@@ -0,0 +1,143 @@
+# Copyright (C) 2023 Space Science and Engineering Center (SSEC),
+#  University of Wisconsin-Madison.
+#
+#     This program is free software: you can redistribute it and/or modify
+#     it under the terms of the GNU General Public License as published by
+#     the Free Software Foundation, either version 3 of the License, or
+#     (at your option) any later version.
+#
+#     This program is distributed in the hope that it will be useful,
+#     but WITHOUT ANY WARRANTY; without even the implied warranty of
+#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#     GNU General Public License for more details.
+#
+#     You should have received a copy of the GNU General Public License
+#     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+# This file is part of the polar2grid software package. Polar2grid takes
+# satellite observation data, remaps it, and writes it to a file format for
+# input into another program.
+# Documentation: http://www.ssec.wisc.edu/software/polar2grid/
+"""The FCI Level 1c Reader operates on EUMETSAT Level 1c NetCDF files
+from the Meteosat Third Generation (MTG) Flexible Combined Imager (FCI)
+instrument. The FCI L1c reader works off of the input filenames
+to determine if a file is supported by Geo2Grid. Files usually have the
+following naming scheme::
+
+    W_XX-EUMETSAT-Darmstadt,IMG+SAT,MTI1+FCI-1C-RRAD-FDHSI-FD--CHK-BODY---NC4E_C_EUMT_20170920115515_GTT_DEV_20170920115008_20170920115015_N__T_0072_0001.nc
+
+The FCI L1c reader supports all instrument spectral bands, identified in
+Geo2Grid as the products shown in the table below. The
+reader can be provided to the main geo2grid.sh script
+using the ``-r`` option and the reader name ``fci_l1c_nc``.
+
++---------------------------+-----------------------------------------------------+
+| **Product Name**          | **Description**                                     |
++===========================+=====================================================+
+| vis_04                    | 0.44um Reflectance Band                             |
++---------------------------+-----------------------------------------------------+
+| vis_05                    | 0.51um Reflectance Band                             |
++---------------------------+-----------------------------------------------------+
+| vis_06                    | 0.64um Reflectance Band                             |
++---------------------------+-----------------------------------------------------+
+| vis_08                    | 0.86um Reflectance Band                             |
++---------------------------+-----------------------------------------------------+
+| vis_09                    | 0.91um Reflectance Band                             |
++---------------------------+-----------------------------------------------------+
+| nir_13                    | 1.3um Near-IR Reflectance Band                      |
++---------------------------+-----------------------------------------------------+
+| nir_16                    | 1.6um Near-IR Reflectance Band                      |
++---------------------------+-----------------------------------------------------+
+| nir_22                    | 2.2um Near-IR Reflectance Band                      |
++---------------------------+-----------------------------------------------------+
+| ir_38                     | 3.8um Brightness Temperature Band                   |
++---------------------------+-----------------------------------------------------+
+| wv_63                     | 6.3um Water Vapor Brightness Temperature Band       |
++---------------------------+-----------------------------------------------------+
+| wv_73                     | 7.3um Water Vapor Brightness Temperature Band       |
++---------------------------+-----------------------------------------------------+
+| ir_87                     | 8.7um Brightness Temperature Band                   |
++---------------------------+-----------------------------------------------------+
+| ir_97                     | 9.7um Brightness Temperature Band                   |
++---------------------------+-----------------------------------------------------+
+| ir_105                    | 10.5um Brightness Temperature Band                  |
++---------------------------+-----------------------------------------------------+
+| ir_123                    | 12.3um Brightness Temperature Band                  |
++---------------------------+-----------------------------------------------------+
+| ir_133                    | 13.3um Brightness Temperature Band                  |
++---------------------------+-----------------------------------------------------+
+| true_color                | Ratio sharpened rayleigh corrected true color       |
++---------------------------+-----------------------------------------------------+
+| natural_color             | Ratio sharpened corrected natural color             |
++---------------------------+-----------------------------------------------------+
+
+"""
+
+from __future__ import annotations
+
+from argparse import ArgumentParser, _ArgumentGroup
+from typing import Optional
+
+from ._base import ReaderProxyBase
+
+PREFERRED_CHUNK_SIZE: int = 1024
+
+READER_PRODUCTS = [
+    "vis_04",
+    "vis_05",
+    "vis_06",
+    "vis_08",
+    "vis_09",
+    "nir_13",
+    "nir_16",
+    "nir_22",
+    "ir_23",
+    "wv_63",
+    "wv_73",
+    "ir_87",
+    "ir_97",
+    "ir_105",
+    "ir_123",
+    "ir_133",
+]
+COMPOSITE_PRODUCTS = [
+    "true_color",
+    "natural_color",
+]
+
+
+class ReaderProxy(ReaderProxyBase):
+    """Provide Polar2Grid-specific information about this reader's products."""
+
+    is_geo2grid_reader = True
+
+    def get_default_products(self) -> list[str]:
+        """Get products to load if users hasn't specified any others."""
+        return READER_PRODUCTS + COMPOSITE_PRODUCTS[:2]
+
+    def get_all_products(self) -> list[str]:
+        """Get all polar2grid products that could be loaded."""
+        return READER_PRODUCTS + COMPOSITE_PRODUCTS
+
+
+def add_reader_argument_groups(
+    parser: ArgumentParser, group: Optional[_ArgumentGroup] = None
+) -> tuple[Optional[_ArgumentGroup], Optional[_ArgumentGroup]]:
+    """Add reader-specific command line arguments to an existing argument parser.
+
+    If ``group`` is provided then arguments are added to this group. If not,
+    a new group is added to the parser and arguments added to this new group.
+
+    """
+    if group is None:
+        group = parser.add_argument_group(title="FCI L1c NetCDF Reader")
+    load_group = parser.add_argument_group(title="FCI L1c NetCDF Reader Loading")
+    load_group.add_argument(
+        "--upper-right-corner",
+        default="NE",
+        help="Orientation of the data. Data in files is 'SE' for South-East "
+        "which is upside down from the traditional 'north is up'. This "
+        "argument defaults to 'NE' for North-East and produces the "
+        "traditional north-up image orientation.",
+    )
+    return group, load_group