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# Sky surface algorithm definitions.
define SKF_LEN 16 # Length of parameter structure
define SKF_STRLEN 9 # Length of string
define SKF_STEP Memr[P2R($1)] # Number of sky lines to sample
define SKF_LMIN Memr[P2R($1+1)] # Minimum number of lines to fit
define SKF_FUNC1D Memi[$1+2] # 1D Fitting function
define SKF_FUNC2D Memi[$1+3] # 2D Fitting function
define SKF_XORDER Memi[$1+4] # Sky fitting x order
define SKF_YORDER Memi[$1+5] # Sky fitting y order
define SKF_XTERMS Memi[$1+6] # Sky fitting cross terms
define SKF_BLK1D Memi[$1+7] # Sky block size for 1D averages
define SKF_HCLIP Memr[P2R($1+8)] # Sky fitting high sigma clip
define SKF_LCLIP Memr[P2R($1+9)] # Sky fitting low sigma clip
define SKF_NITER Memi[$1+10] # Number of iterations
define SKF_STR Memc[P2C($1+11)] # String
define SKFLMIN 10 # Minimum number of lines to fit
define SKFFUNC1D "chebyshev" # 1D fitting function
define SKFFUNC2D "chebyshev" # 2D fitting function
define SKFXTERMS "half" # Cross terms
define SKFNITER 5 # Number of iterations
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