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The article giving this tool is Here
**Powspec5
**Powmes- This program measures the power spectrum from a N-body simulation with arbritrary rectangular 3D box. It reads a density field as input and outputs the power-spectrum. Inspired from Pow (S.D.M White). This works only for grids for which each dimensions are power of two.
Auteur du code : Stephane Colombi, IAP
Sont fournis les trois fichiers : .f, .h, .s
Attention : ce code ne peut pas etre utilise tel quel pour l’analyse de surveys observationnels.
**Part_to_dens_long
This code compute the Power Spectrum, it accepts files at the RAMSES format.
This programs computes the density in a 3D file from an input particles file (using either NGP or CIC interpolation). It works for arbitrary grid with periodic boundaries.
Auteur du code : Stephane Colombi IAP
Sont fournis les trois fichiers : .f, .h et .s