Coordinate systems for solar image data

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Heliophysics Event Knowledgebase for the Solar Dynamics Observatory (SDO) and Beyond (2010, background): “A variety of coordinate systems are supported for contributions based upon the World Coordinate System (Thompson, 2006).”
EVOLUTION OF MAGNETIC FIELD AND ENERGY IN A MAJOR ERUPTIVE ACTIVE REGION BASED ON SDO/HMI OBSERVATION (2011, methodology): “The images are de-rotated to the disk center and remapped using Lambert equal area projection (Calabretta & Greisen 2002; Thompson 2006).”
SunPy—Python for solar physics (2015, methodology): “The wcs package in SunPy implements the World Coordinate System (WCS) for solar coordinates as described by Thompson (2006).”
The Atmospheric Imaging Assembly (AIA) on the Solar Dynamics Observatory (SDO) (2011, positive): “The attitude information is consistent with the world coordinate system (Thompson, 2006).”
The Helioseismic and Magnetic Imager (HMI) Vector Magnetic Field Pipeline: Overview and Performance (2014, methodology): “The first refers to the observation’s physical location on the Sun or in the sky, for which HMI uses World Coordinate System (WCS) standards for solar images (Thompson, 2006).”
The SunPy Project: Open Source Development and Status of the Version 1.0 Core Package (2020, methodology): “See Thompson (2006) for more information about each of these coordinate frames.”