7:ech_profile--Model Object Profile

The object profile model is constructed by subsampling the profile and may be an all order average, or independently calculated for each order (enabled by setting TUNE_USE_NXF=1). There are also facilities for modelling profiles which vary slowly with wavelength by fitting polynomials in the wavelength direction (set TUNE_OBJPOLY>0).

The degree of subsampling is controlled using the parameter TUNE_PFLSSAMP which sets the number of subsamples across the spatial profile.

Parameters:

• INPTIM - Frame to extract data from.
• TUNE_DIAGNOSE - YES to log activity to debugging file.
• TUNE_MAXPOLY - Maximum coefficients for fits.
• TUNE_MXSKYPIX - Maximum number of sky-pixels.
• TUNE_OBJPOLY - Degree of polynomial to use for object.
• TUNE_PFLSSAMP - Maximum number of subsamples in profile.
• TUNE_USE_NXF - Fraction of X-samples to use in profile.

Reduction File Objects:

• DEK_ABOVE - type: _INTEGER, access: READ.
• DEK_BELOW - type: _INTEGER, access: READ.
• FITTED_SKY - type: _REAL, access: READ.
• MODEL_PROFILE - type: _REAL, access: READ/WRITE.
• NO_OF_ORDERS - type: _INTEGER, access: READ.
• NX_PIXELS - type: _INTEGER, access: READ.
• NY_PIXELS - type: _INTEGER, access: READ.
• OBJ_MASK - type: _INTEGER, access: READ.
• SKY_MASK - type: _INTEGER, access: READ.
• TRC_POLY - type: _DOUBLE, access: READ.