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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.
It can also read data from a single 3-
file
(
,
and
)
to calculate correlation spectra BB, EE, TE or TB between
and
-coefficients.
If the input file contains only
-coefficients, to calculate
TE or TB-spectra,
a file with
or
-coefficients should be added
in the command string.
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
.
- Calculating polarizatiom modes
and
:
-
alm2dl 3alm.fits -tbl -lmax 50 -o tbl.txt
reads a file '
3alm.fits',
calculates T-B correlation spectrum and
writes ASCII coefficients up to
to '
tbl.txt'.
-
alm2dl alm.fits elm.fits -tel -lmax 50 -o tel.txt
reads files '
alm.fits' and
'
elm.fits',
calculates T-E correlation spectrum
and writes ASCII coefficients up to
to '
tel.txt'.
-
alm2dl 3alm.fits -e -lmax 50 -o elm.fts
reads a file '
3alm.fits',
and extracts data of E-mode writing them
in FITS format to file '
elm.fts' up to
.
Next: cl2map
Up: GLESP Description and Examples
Previous: GLESP Description and Examples
Verkhodanov Oleg
2009-04-01