---
title: "Spherical harmonic rotations"
keywords: spherical harmonics software package, spherical harmonic transform, legendre functions, multitaper spectral analysis, fortran, Python, gravity, magnetic field
sidebar: fortran_sidebar
permalink: spherical-harmonic-rotations.html
summary: 
toc: false
folder: fortran
---

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| Module name | Description |
| ----------- | ----------- |
| [djpi2](djpi2.html) | Compute the rotation matrix d(&pi;/2) used in rotating data expressed in spherical harmonics. |
| [SHRotateCoef](shrotatecoef.html) | Determine the spherical harmonic coefficients of a complex function rotated by three Euler angles. |
| [SHRotateRealCoef](shrotaterealcoef.html) | Determine the spherical harmonic coefficients of a real function rotated by three Euler angles. |
