| GAUSS_STDEV | float | The size (stdev=FWHM/2.35) of the Gaussian PSF to resample to | pixels |
| SHAPELETS_ORDER | int | Number of shapelets in the expansion | |
| SOURCE_CODE_VERSION | int | The version of the source code | |
| SPATIAL_ORDER | int | Order of polynomial modelling variation across focal plane | |
