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# Sky parameter structure.
define SKY_LEN 5 # Length of parameter structure
define SKY_TYPE Memi[$1] # Type of sky algorithm
define SKY_NEWSKY Memi[$1+1] # Determine a new sky sigma?
define SKY_NEWSIG Memi[$1+2] # Determine a new sky sigma?
define SKY_SURPARS Memi[$1+3] # Pointer to parameters for surface fit
define SKY_BLKPARS Memi[$1+4] # Pointer to parameters for block stat
define SKY_TYPES "|surface|block|"
define SKY_SURFACE 1 # Surface fitting
define SKY_BLOCK 2 # Block statistics
define SKY_SURPARSLEN 7 # Length of parameter structure
define SKY_NSKYLINES Memi[$1] # Number of sky lines to sample
define SKY_SKYBLK1D Memi[$1+1] # Sky block size for 1D averages
define SKY_SKYHCLIP Memr[P2R($1+2)] # Sky fitting high sigma clip
define SKY_SKYLCLIP Memr[P2R($1+3)] # Sky fitting low sigma clip
define SKY_SKYXORDER Memi[$1+4] # Sky fitting x order
define SKY_SKYYORDER Memi[$1+5] # Sky fitting y order
define SKY_SKYXTERMS Memi[$1+6] # Sky fitting cross terms
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