Re-exported Packages
Some features are simply re-exported functions from other, external packages. These packages have (typically) been extracted from this package since they can be used in a self-contained manner, independently of their application to CMB analysis.
For more information, see the documentation provided by each of the following packages:
AssociatedLegendrePolynomials.jl
The associated Legendre polynomials (ALPs)constructs part of the eigenfunction basis for functions on the sphere and plays a very important role in analysis of signals on the sphere. In addition, the ALPs are required for the computation of pixel-pixel covariance matrices that this package uniquely provides.
Note that this package re-exports the AssociatedLegendrePolynomials
module under the name Legendre
for both backwards compatibility with earlier versions of this package as well as for brevity.
SphericalHarmonics.jl
The spherical harmonic transforms are a key analytical techniques used in analysis of the CMB. They are built on top of the associated Legendre polynomials.
Healpix.jl
The HEALPix pixelization is a very common mapping format used in CMB (and other fields of astronomy more generally). For instance, this package provides the necessary glue to perform spherical harmonic transforms on a (scalar, i.e. temperature field) map in the HEALPix format.