FITS Headers
wmap_iqusmap_ninv_svd_r4_yr2_Ka1_v3p1.fits
Primary Header
SIMPLE = T /FITS format
BITPIX = -64 /
NAXIS = 2 /Number of dimensions
NAXIS1 = 12288 /
NAXIS2 = 12288 /
EXTEND = T /Extensions may be present
RESOLUTN= 4 /Resolution Index
PIXTYPE = 'HEALPIX ' /Pixel algorithm
ORDERING= 'NESTED ' /Ordering scheme
NSIDE = 16 /Resolution parameter
NPIX = 3072 /# pixels in the maps
DATE = '2008-04-30T00:00:00' /file creation date
DA = 'Ka1 ' /WMAP Differencing Assembly
FREQ = 'Ka Band ' /Frequency Band
RELEASE = 'DR3 ' /WMAP Release
TELESCOP= 'WMAP ' /Wilkinson Microwave Anisotropy Probe
REFERENC= 'WMAP Explanatory Supplement: http://lambda.gsfc.nasa.gov/' /
COMMENT Results of singular value decomposition of the N-inverse covariance
COMMENT matrix for the year 2 Res 4 maps for the differencing assembly
COMMENT indicated by the DA keyword. The form of the decomposition
COMMENT is N^{-1} = u * s * u^T. The decomposition was done on N^{-1}
COMMENT in Nobs units. The results have been scaled to units of 1/mK**2
COMMENT by dividing the original s values for this DA by 2.30692 mK**2.
COMMENT The matrix u is an orthogonal 4NPIX x 4NPIX matrix, stored in the
COMMENT primary data array. The diagonal matrix of eigenvalues s, scaled to
COMMENT 1/mK**2, is stored as a vector of length 4NPIX in the FITS extension.
END
Extension Header 2
XTENSION= 'IMAGE ' / IMAGE extension
BITPIX = -64 / Number of bits per data pixel
NAXIS = 1 / Number of data axes
NAXIS1 = 12288 /
PCOUNT = 0 / No Group Parameters
GCOUNT = 1 / One Data Group
END
