Chaosmagpy

| **Version of CHAOS:** CHAOS-7.9 (0709)

Features
^^^^^^^^
* Updated RC-index file to RC_1997-2021_November_v3.
* Added ability to compute field components at the geographic poles.
* Removed cdot from SV, SA units in :func:`chaosmagpy.data_utils.gauss_units`.
* Added :func:`chaosmagpy.coordinate_utils.sh_analysis`, which performs a
spherical harmonic expansion on a callable.

Bugfixes
^^^^^^^^
* Removed Euler pre-rotation, which was not correctly implemented, and added
a warning.
* Fixed shc-file loader to correctly exclude extrapolation sites.
* Fixed numpy broadcasting error in :func:`chaosmagpy.data_utils.mjd2000`.

| **Version of CHAOS:** CHAOS-7.8 (0708)

Bugfixes
^^^^^^^^
* Fixed CHAOS shc-file loader.

| **Version of CHAOS:** CHAOS-7.8 (0708)

Features
^^^^^^^^
* Added matplotlib's plot_directive for sphinx and added more examples to a
new gallery section in the documentation.
* Added :func:`chaosmagpy.model_utils.pp_from_bspline` to convert the spline
coefficients from B-spline to PP format.
* Changed the way piecewise polynomials are produced from the coefficients in
shc-files. A B-spline representation is now created in an intermediate step
to ensure coefficient time series that are smooth.
* Changed the number format to ``'16.8f'`` when writing shc-files to increase
precision.
* Configuration parameters in ``chaosmagpy.basicConfig`` are now saved to and
loaded from a json-formatted txt-file.
* Added keyword arguments to :meth:`chaosmagpy.chaos.CHAOS.synth_coeffs_sm`
and :meth:`chaosmagpy.chaos.CHAOS.synth_values_sm` to provide the RC-index
values directly instead of using the built-in RC-index file.

updated (2021-06-15).

Features
^^^^^^^^
* Added new usage sections to the documentation

Bugfixes
^^^^^^^^
* Fixed broken link to RC-index file (GitHub issue 5).
* Added lxml to installation instructions
(needed for webpage requests, optional).
* Require hdf5storage version 0.1.17 (fixed read/write intent)

| **Version of CHAOS:** CHAOS-7.5 (0705)

Features
^^^^^^^^
* Modified "nio" colormap to be white-centered.
* Added spatial power spectrum of toroidal sources
(:func:`chaosmagpy.model_utils.power_spectrum`)

| **Version of CHAOS:** CHAOS-7.3 (0703), CHAOS-7.4 (0704)

Features
^^^^^^^^
* Updated RC-index file to RC_1997-2020_Aug_v4.dat.
* Model name defaults to the filename it was loaded from.
* Added function to read the COV-OBS.x2 model
(:func:`chaosmagpy.chaos.load_CovObs_txtfile`) from a text file.
* Added function to read the gufm1 model
(:func:`chaosmagpy.chaos.load_gufm1_txtfile`) from a text file.
* Added class method to initialize :class:`chaosmagpy.chaos.BaseModel` from a
B-spline representation.