FITS2ANA

Source code: fits2ana.pro

Description

FITS2ANA reads a FITS file and returns one or more ANA structure(s). The input FITS file should be a product of ANA2FITS. It must contain at least one RESULTS extension per window.

The DATA extension may be an external extension, else it should be present in the input file. The DATA is automatically transformed, if necessary so that the absorbed dimension is the first dimension.

XDIM1, WEIGHTS, INCLUDE and CONSTANTS extensions are optional.

If not present:

• a dummy DATA cube will be created.
• XDIM1 will be created using the WCS parameters given in the data header.
• WEIGHTS, INCLUDE and CONSTANTS will be created with default values.
• RESIDUALS is created using the fits components and the DATA cube.

An ANA structure is used by e.g. XCFIT_BLOCK, it is created by e.g. MK_ANALYSIS.

Syntax

anas = fits2ana( fitsfile [, windows=windows] [ ,headers_results=headers_results] [, headers_data=headers_data] [, headers_lambda=headers_lambda] [, headers_residuals=headers_residuals] [, headers_weights=headers_weights] [, headers_include=headers_include] [, headers_contants=headers_contants] [, /headers_only] [, /loud] [, /quiet] )

Return Value

An array of ANA structures, the number of elements is the same as the number of windows in the FITS file. Output is scalar if there is only one window.

Output is zero if an error occurred, or if keyword 'headers_only' is set.

Arguments

fitsfile

Name and path to a FITS file (e.g. SPICE level 3 file)

Optional Inputs

windows

A scalar or array of indices of windows to be returned. If not provided all windows will be returned.

Keywords

headers_only

If set, then the data is not loaded, only the headers, the function returns a zero.

loud

If set, then the function will output messages about non-existing extensions.

quiet

If set, warnings will be suppressed.

Optional Output

headers_results

A pointer array, containing the headers of the results extensions as string arrays.

headers_data: A pointer array, containing the headers of the data extensions as string arrays.

headers_lambda

A pointer array, containing the headers of the lambda extensions as string arrays.

headers_residuals

A pointer array, containing the headers of the residuals extensions as string arrays.

headers_weights

A pointer array, containing the headers of the weights extensions as string arrays.

headers_include

A pointer array, containing the headers of the include extensions as string arrays.

headers_contants

A pointer array, containing the headers of the constants extensions as string arrays.