| BACK_DEFAULT | float | Default background to be subtracted in BACK_TYPE MANUAL mode | | |
| BACK_FILTERSIZE | int | Size of background filtering mask in factors of BACK_SIZE | | obs.param |
| BACK_SIZE | int | Size of a background mesh | pixel | obs.param |
| BACK_TYPE | str | The type of background to subtract (AUTO, MANUAL) | | TEXT |
| CELESTIAL_TYPE | str | Celestial coordinate system in output (NATIVE, PIXEL, EQUATORIAL, GALACTIC, ECLIPTIC) | | |
| CENTER | float | Position of center in CENTER_TYPE MANUAL mode | deg | |
| CENTER_TYPE | str | The way the output frame is centered (ALL, MOST, MANUAL) | | |
| COMBINE | str | Combine resampled images (Y, N) | | |
| COMBINE_BUFSIZE | int | Amount of megabytes of buffer memory used for coaddition | | |
| COMBINE_TYPE | str | The image combination method (MEDIAN, AVERAGE, MIN, MAX, WEIGHTED, CHI2, SUM) | | |
| COPY_KEYWORDS | str | String containing comma-separated FITS keywords to copy to output images | | |
| DELETE_TMPFILES | str | Delete temporary image files | | |
| FSCALASTRO_TYPE | str | How to compute the astrometric part of the flux scaling (NONE, FIXED) | | |
| FSCALE_DEFAULT | float | Default flux scale to adopt if FSCALE_KEYWORD nonexistent | | |
| FSCALE_KEYWORD | str | FITS keyword containing flux scale in input images | | |
| GAIN_DEFAULT | float | Default gain to adopt if GAIN_KEYWORD nonexistent | e^- / ADU | |
| GAIN_KEYWORD | str | FITS keyword containing the gain in input images | | |
| HEADER_ONLY | str | Only create the header in the combined image (Y, N) | | |
| HEADER_SUFFIX | str | Extension of the replacement header files | | |
| IMAGE_SIZE | int | Dimensions of the output image | pixel | |
| IMAGEOUT_NAME | str | Filename of output image | | |
| INTERPOLATE | str | Interpolate upon resampling (Y, N) | | |
| MEM_MAX | int | Maximum amount of megabytes allowed for RAM storage | | |
| NTHREADS | int | Number of threads to run simultaneously during resampling | | |
| OVERSAMPLING | int | Amount of oversampling in each dimension | | |
| PIXEL_SCALE | float | Step between pixels in each dimension | arcsec / pixel | instr.scale obs.param |
| PIXELSCALE_TYPE | str | How the output pixel size is set (MEDIAN, MIN, MAX, MANUAL, FIT) | | |
| PROJECTION_TYPE | str | Projection system used in output in standard WCS notation (AZP, TAN, STG, SIN, ARC, ZPN, ZEA, AIR, CYP, CEA, CAR, MER, COP, COE, COD, COO, BON, PCO, GLS, PAR, MOL, AIT, TCS, CSC, QSC) | | |
| RESAMPLE | str | Resample the input images (Y, N) | | |
| RESAMPLE_DIR | str | Path of the directory where the resampled images are written | | |
| RESAMPLE_SUFFIX | str | Extension of the resampled images | | |
| RESAMPLING_TYPE | str | Resampling method (NEAREST, BILINEAR, LANCZOS2, LANCZOS3, LANCZOS4) | | |
| SUBTRACT_BACK | str | Background-subtract images prior to resampling | | |
| VERBOSE_TYPE | str | Verbosity level (QUIET, NORMAL, FULL) | | meta.code |
| VMEM_DIR | str | Path of the directory where virtual-memory and other temporary files are written | | |
| VMEM_MAX | int | Maximum amount of megabytes allowed for virtual-memory storage | | |
| WEIGHT_IMAGE | str | List of filenames of input weight-maps | | obs.image meta.fits obs.param |
| WEIGHT_SUFFIX | str | Extension of the input weight-maps | | |
| WEIGHT_TYPE | str | Type of input weight-map (NONE, MAP_WEIGHT, MAP_VARIANCE, MAP_RMS) | | meta.dataset meta.file obs.param |
| WEIGHTOUT_NAME | str | Filename of the output weight-map | | |
| WRITE_FILEINFO | str | Write extended information from input images to output images | | |
