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Description and Examples
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Description and Examples
Description
alm2dl reads and calculates
and where

(1) 

(2) 
where K, is output
in unit of and
is unitless.
alm2dl can read the input file either in FITS or in ASCII formats.
The FITS binary format should contain 3 fields: index=
(in HEALPix
definition), real part () and
imaginary part (). The ASCII
format should contain 4 entries : L, M, Re, Im,
where L is the multipole and M is the multipole.
alm2dl
calculates amplitudes: and phases defined as
in .
alm2dl
also lists the values of the FITS
coefficients, which can be output either to a file or to the
standard output device for display.
Examples
 Calculating or :
 Listing :
 Calculating amplitudes:
 alm2dl amp alm.fits lmax 10
reads ' alm.fits' and calculates
amplitudes up to .
 alm2dl amp a alm.txt lmax 50 o
amp.txt
reads ASCII ' alm.txt' and
outputs
ASCII amplitudes up to in ' amp.txt'.
 Calculating phases:
 alm2dl ph alm.fits lmax 10
reads ' alm.fits' and displays
phases up to .
Next: cl2map
Up: GLESP
Description and Examples
Previous: GLESP
Description and Examples
Gauss Legendre Sky Pixelization