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Migrating
Sanchez 1.0 is a complete rewrite. Command-line arguments have been preserved where possible, but there have been some necessary changes.
Sanchez pre-1.0 allowed an optional mask to be loaded. This mask was a JPEG file was which overlayed on the image to both mask areas outside the full disc and to add shading. Mask images are no longer supported; instead masking is performed programmatically based on the identified satellite, and shading is performed via the atmosphere option.
Sanchez pre-1.0 required an explicit underlay image to be provided. This is now optional, as Sanchez dynamically generates the underlay based on the identified satellite.
The -u / --underlay argument is still available, however specifies the path to an equirectangular image, such as those in the NASA Blue Marble collection.