lars coordinates

Lars coordinates are messed up somehow. The keywords specifying the location on the disk exhibit problems: Coordinates are given via two redundant sets of keywords:

SHG_LAT and SHG_LON give the Stonyhurst Heliographic Coordinates position in degrees according to the header
HPC_X and HPC_Y give heliographic coordinates in arcsec

If these coordinate information sets match up, there should be a steady relationship between them. Plotting reveals some sort of mismatch:

Edited Jul 25, 2019 by Carl Schaffer

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