Will Barnes

Subclassing the Particle class from PlasmaPy

3

**Question:** Should the `Ion` class subclass the `Particle` class from PlasmaPy? The `atomic` subpackage in PlasmaPy provides an object for representing particles via the [`Particle` class](http://docs.plasmapy.org/en/stable/atomic/particle_class.html). `Particle` provides a convenient...

Interface with other databases

1

While some parts of the fiasco database are specific to CHIANTI, the overall package structure would be well suited to interface with other atomic databases as well, e.g. * [AtomDB](http://www.atomdb.org/index.php)...

Add gallery example showing how to track and co-align an active region

6

### Provide a general description of the issue or problem. A common task when dealing with AIA data (or any imaging data in time) is to track a particular region...

Prioritize `date_start` when defining WCS and coordinate frame

4

As pointed out by @yjzhu-solar, in [EIS SW Note 9, Section 2.4](https://solarb.mssl.ucl.ac.uk/SolarB/eis_docs/eis_notes/09_POINTING/eis_swnote_09.pdf), it states that, > The FITS headers, however, do not include the time of each exposure, and thus...

When performing coalignment between two images, the inherent assumption is that the coalignment is done only in the plane of the sky and that the two images reside in the...

Animations in example gallery do not animate

1

There is at least one example gallery entry that shows a resulting animation (https://docs.sunpy.org/projects/ndcube/en/latest/generated/gallery/creating_even_spaced_wavelength_visualisation.html#sphx-glr-generated-gallery-creating-even-spaced-wavelength-visualisation-py), but that animation is not actually animated in the rendered example gallery. To enable this, we...

Building the HDF5 database can take an annoyingly long time. This is fine when you only have to do it every once in a while, but is increasingly becoming an...

Use FITS-4 compliant date keywords in resulting maps

2

The FITS-4 standard defines the following keys to specify the date(s) of the observations, See Table 35 of [this document](https://fits.gsfc.nasa.gov/standard40/fits_standard40aa-le.pdf). In the resulting maps from fitting EIS spectra, the metadata...

Use `astropy.units.equivalencies.spectral` to compute wavelengths to energies.

1

Many places throughout the package, I convert wavelengths to energies through the formula $hc/\lambda$. Instead, we should be using the spectral equivalency provided by astropy units: https://docs.astropy.org/en/stable/units/equivalencies.html#equivalencies. The easiest way...

Similar to #325 and how the abundance is handled, there should be logic for passing in an array of ionization fractions in lieu of using the predefined dataset. By default,...