Installation

Pre-install conda and git in your machine.

Navigate to the directory you want to clone the repository into:
```
$ cd /User/<YourUser>/repos/
```
Before cloning this repository, follow the installation instructions for PASTIS: https://github.com/spacetelescope/PASTIS
Create a new ultra conda environment using the environment.yml file present inside PASTIS repository:
```
$ cd PASTIS
$ conda env create --name ultra --file environment.yml
```
Activate the conda environment:
```
$ conda activate ultra
```

Clone the ULTRA repository:

$ git clone https://github.com/spacetelescope/ULTRA.git

Update the newly created ultra conda environment with environment.yml file inside ULTRA repository:
```
$ cd ULTRA
$ conda env update --file environment.yml
```
Install the ULTRA package into ultra environment in develop mode:
```
$ python setup.py develop
```
Install the PASTIS package into ultra environment in develop mode:
```
$ cd PASTIS
$ python setup.py develop
```