---
tags: diagnostics, proton radiography, particle tracker, minutes
---

# PlasmaPy Proton Meeting | Monday 2021 January 04 at 09:00 PT / 12:00 ET

[](https://hackmd.io/h4i_RVW7S8aR2w7guEVTFQ)

### Video Conference Information
* Instant messaging: [Matrix](https://element.im/app/#/room/#plasmapy:openastronomy.org) and [Gitter](https://gitter.im/PlasmaPy/Lobby)
* [GitHub Minutes Repository](https://github.com/PlasmaPy/plasmapy-project/tree/master/minutes)
* [Proton Sub-directory](https://github.com/PlasmaPy/plasmapy-project/tree/master/minutes/proton_radiography)
* [PlasmaPy on GitHub](https://github.com/PlasmaPy/plasmapy) ([pull requests](https://github.com/PlasmaPy/plasmapy/pulls), [issues](https://github.com/PlasmaPy/plasmapy/issues))
* [PlasmaPy Enhancement Proposals on GitHub](https://github.com/PlasmaPy/PlasmaPy-PLEPs)
* [PlasmaPy Google Calendar](https://calendar.google.com/calendar?cid=bzVsb3ZkcW0zaWxsam00ZTlrMDd2cmw5bWdAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbQ)
* GitHub Project: [Line Integrated Diagnostics/Proton Radiography](https://github.com/PlasmaPy/PlasmaPy/projects/21)

## Agenda (please feel free to edit or add items)

1. Introductions
2. GitHub Project: [Line Integrated Diagnostics/Proton Radiography](https://github.com/PlasmaPy/PlasmaPy/projects/21)
3. ...
4. ...
5. Issues
1. ...
2. ...
6. Pull requests in progress
1. [PR 963](https://github.com/PlasmaPy/PlasmaPy/pull/963): Grids #2
2. [PR 953](https://github.com/PlasmaPy/PlasmaPy/pull/953): Particle Tracker

## Attendees

* Erik
* Peter

## Action Items

***Last Meeting***
> ***Dominik***
> * in PR 953 give reference to Boris pusher blog and then open issue about making our own notebook
> * will ask `xarray` & Astropy about status of unit support...will AstorPy units come in
>
> ***Erik***
> * communicate to Peter that we should not worry about wrangling units and only add the unit type to `xarray`'s `attrs` field
>
> ***Peter***
> * Make simple notebooks for the grids (both regular and irregular grids)
> * Open PR for a prototype of fields functionality

***Peter***
* Update `grid.__repr__` to display info also displayed by `xarray.dataset.__repr__`
* read through PR 963 notebooks

***Erik***
* Review PR 963 ... mostly the notebooks
* Check with Nick about reviewing PR 953

## Minutes

* [PR 963](https://github.com/PlasmaPy/PlasmaPy/pull/963): Grids #2
* `__repr__`
* ```python
def __repr__(self):
# build out grid repr info
grid_repr = "..."
return self.ds.__repr__ + "\n\n" + grid_repr

        * [Erik] come around to not forcing `grid.__repr__ == dataset.__repr__`.  However, `grid.__repr__` needs to be updated to include info displayed by `dataset.__repr__` (e.g. Variable and Coordinate references)
    * For now, envision a new grid object for each new grid (i.e. not managing data all in one `xarray.dataset`)...**It's not apparent this is not he correct way, but will likely have to be born out of the prototyping.**
* PR 953 looks to be ready for final review
    * Peter will modify proton functionality w.r.t. how the Particle Tracker functionality works ... (i.e. he's waiting of PR 953)
    * After PR 953 is merged, Peter will open a new PR(s) for ParticleTracker that will suggest features need for line integrated diagnostics