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Description and Examples
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Description
cl2map synthesizes CMB
temperature maps from spherical harmonic coefficients .

(3) 
Inversely,
cl2map
can decompose an input CMB temperature map into its spherical harmonic
coefficients and/or power spectrum:

(4) 

(5) 
where K. If necessary, dipole can be
calculated and included.
To synthesize a map,
cl2map
can process an file either in FITS Binary
Extensionlike or in
ASCII format, or can process ASCII strings.
If the input is a power spectrum or , cl2map
generates a Gaussian map of CMB anisotropies by assigning the = COMPLEX(, )
mutually independent Gaussiandistributed real () and
imaginary part (), both with a standard deviation
at each harmonic.
To decompose an input map for its
coefficients, cl2map processes
the FITS Binary map with position and temperature
with 3 sections:
 ,
the centerposition of the
rings as a function of the polar angle (nx positions),
 nx numbers with the number of pixels, nphi, in the corresponding
ring,
 organized
in one row using Point 1 as the major index and Point 2 as
the minor index.
Examples
 Synthesizing a map from given spherical harmonic coefficients:
 cl2map falm alm.fits o map.fits
nx
250 np 500 lmax 100
synthesizes the map from input FITS file ' alm.fits'
and outputs to
the
file ' map.fits' with resolution
(250,500). The maximum multipole
number is 100.
 cl2map alm "2,1,1,0" o
map.y21.fits nx 100 np 200 lmax 4
synthesizes a map from the string ' "2,1,1,0"' ( )and outputs to the
file ' map.y21.fits'. The
resolution of the map is (100,200). The maximum multipole number is 4.
 cl2map falm alm.txt dipole o
map.dipole.fits nx 50 np 100 lmax 10
synthesizes the dipole map from the input ASCII file ' alm.txt' and
outputs to the file ' map.dipole.fits'.
The
resolution of this dipole
map is (50, 100).
 cl2map falm alm.fits di+ o
map.dip.fits lmax 50
synthesizes the map (up to including the dipole)
from the input FITS file ' alm.fits'
and
outputs to the file ' map.dip.fits'.
The
resolution of the map is the
default value, i.e. (201,402).
 cl2map falm alm.fits lmin 5 lmax
5 o map.fits
synthesizes the map for from the input FITS file
' alm.fits' and
outputs to the file ' map.fits'.
The resolution
is the default value (201,402).
 cl2map falm alm.fits mmin 2 mmax
10 nx 400 np 800 o map.fits lmax 50
synthesizes the map up to for all from
2 to 10 from the input
FITS file ' alm.fits' and
outputs to
the file ' map.fits'. The
resolution
is (400,800).
 Gaussian random map simulation from a given angular power
spectrum:
 Map decomposition for its angular power spectrum and/or spherical
harmonic coefficients:
Next: cmap
Up: GLESP
Description and Examples
Previous: alm2dl
Gauss Legendre Sky Pixelization