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Working with ABI Level 2 Cloud Product Files | ||
-------------------------------------------- | ||
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This example walks through the creation of GOES ABI | ||
Level 2 GeoTIFF product image files and adding overlays. | ||
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The Basics of Geo2Grid ABI L2 GeoTIFF File Creation | ||
*************************************************** | ||
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Find the options available when creating GOES-16, -17 and -18 | ||
ABI Level 2 GeoTIFFs: | ||
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``geo2grid.sh -r abi_l2b -w geotiff -h`` | ||
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List the products that can be created from your ABI dataset: | ||
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``geo2grid.sh -r abi_l2 -w geotiff --list-products -f <path_to_files>`` | ||
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Geo2Grid now supports two different ABI Cloud Products, cloud top | ||
height (HT) and cloud top temperature (TEMP). The height files use product | ||
names ``ACHA`` while the temp files using ``ACHT``. For instance | ||
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``CG_ABI-L2-ACHAC-M6_G17_s20223271831172_e20223271833556_c20223271834370.nc`` | ||
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``CG_ABI-L2-ACHTC-M6_G17_s20223271831172_e20223271833556_c20223271834370.nc`` | ||
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You can provide Geo2Grid with both files for the same date/time and it will | ||
provide you the option to create both products with one execution. | ||
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To create GeoTIFF output files of both products found in this data set, | ||
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``geo2grid.sh -r abi_l2 -w geotiff --num-workers 8 -f <path_to_files>`` | ||
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By default the products are color enhanced using the colormap: | ||
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``$GEO2GRID_HOME/colormaps/abi_l2_modified_cloud_top.cmap``. | ||
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Create just a Cloud Top Height Geotiff image: | ||
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``geo2grid.sh -r abi_l1b -w geotiff -p HT -f <path_to_abi_files>`` | ||
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Create a Cloud Top Temperature image from the GOES-17 CONUS domain | ||
product created from 23 November 2022, 18:31 UTC ABI observations. | ||
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.. code-block:: bash | ||
geo2grid.sh -r abi_l1b -w geotiff -p TEMP -f CG_ABI-L2-ACHTC-M6_G17_s20223271831172_e20223271833556_c20223271834370.nc | ||
The resulting image is displayed below. | ||
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.. raw:: latex | ||
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\newpage | ||
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.. figure:: ../_static/example_images/GOES-17_ABI_TEMP_20221123_183117_GOES-West_original.png | ||
:width: 100% | ||
:align: center | ||
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CSPP GEO ABI AIT GOES-17 Cloud Top Temperature GeoTIFF image (GOES-17_ABI_TEMP_20221123_183117_GOES-West.tif) | ||
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.. raw:: latex | ||
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\newpage | ||
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Add a color table, coastlines, borders and latitude/longitude grid lines to the image, and write the output | ||
to the file ``my_goes17_abi_ctt.png`` using the ``add_coastlines.sh`` script. The script provides many options, | ||
including the ability to add a colorbar title using the font of your choice: | ||
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.. code-block:: bash | ||
add_coastlines.sh GOES-17_ABI_TEMP_20221123_183117_GOES-West.tif --add-colorbar --colorbar-text-color="black" --colorbar-title="GOES-17 ABI Cloud Top Temperature (°K) 23 November 2022 18:30 UTC" --add-coastlines --coastlines-outline black --coastlines-level 1 --coastlines-resolution=i --add-borders --borders-level 2 --borders-outline gray --coastlines-width 2 --colorbar-tick-marks 10 --colorbar-font /usr/share/fonts/gnu-free/FreeSerifBold.ttf -o my_goes17_abi_ctt.png | ||
.. figure:: ../_static/example_images/my_goes17_abi_ctt.png | ||
:width: 100% | ||
:align: center | ||
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CSPP GEO ABI AIT GOES-17 Cloud Top Temperature GeoTIFF image with overlays (my_goes17_abi_ctt.png). | ||
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Users can aslo overlay Level 2 images onto other GeoTIFFS. In the example execution below, we | ||
overaly the Cloud Top Temperature GeoTIFF image on top of the GOES-17 true color image from | ||
the same time and name the output GeoTIFF "goes17_overlay_true_color_cloud_temperature.tif". | ||
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.. code-block:: bash | ||
overlay.sh GOES-17_ABI_RadC_true_color_20221123_183117_GOES-West.tif GOES-17_ABI_TEMP_20221123_183117_GOES-West.tif goes17_overlay_true_color_cloud_temperature.tif | ||
The new combined GeoTIFF is displayed below. | ||
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.. figure:: ../_static/example_images/goes17_overlay_true_color_cloud_temperature.png | ||
:width: 100% | ||
:align: center | ||
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CSPP GOES-17 ABI cloud top temperatures overlaid on the coincident true color image from 23 November 2022, 18:31 UTC (goes17_overlay_true_color_cloud_temperature.tif). |
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