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read_fits_s

This IDL facility reads a FITS file into an IDL structure.

FORMAT

IDL> READ_FITS_S , File, Prim_stc, [Xten_stc, MERGE=, EXTENSION=]

QUALIFIERS

File

name of a FITS file containing the healpix map(s) in an extension or in the image field

Prim_stc

variable containing on output an IDL structure with the following fields:
- primary header (tag : 0, tag name : HDR)
- primary image (if any, tag : 1, tag name : IMG)

Xten_stc

(optional),
variable containing on output an IDL structure with the following fields:
- extension header (tag : 0, tag name : HDR)
- data column 1 (if any, tag : 1, tag name given by TTYPE1 (with all spaces removed and only letters, digits and underscore)
- data column 2 (if any, tag : 2, tag name given by TTYPE2)
...

EXTENSION=

(optional),
scalar integer containing on input the extension to be read (0 based)
default:0

MERGE=

if set Prim_stc contains :
- the concatenated primary and extension header (tag name : HDR)
- primary image (if any, tag name : IMG)
- data column 1 ...
and Exten_stc is set to 0
default:: not set (or set to 0)

idl

version 6.1 or more is necessary to run read_fits_s

synfast

This HEALPix facility will generate the FITS format sky map that can be read by read_fits_s .

read_fits_cut4, read_fits_map

read_tqu, read_fits_s

HEALPix IDL routines to read cut-sky maps, full-sky maps, polarized full-sky maps and arbitrary data sets from FITS files

write_fits_sb

This HEALPix IDL facility can be used to generate FITS format sky maps readable by read_fits_s .

read_fits_s reads in the file 'dmr_skymap_90a_4yr.fits'. On output, pdata contains the primary header and xdata is a structure whose first field is the extension header, and the other fields are vectors with respective tag names PIXEL, SIGNAL, N_OBS, SERROR, ... (see help,/struc,xdata)

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Eric Hivon 2010-06-18