Make scaling optional

[aburrell]

Description

There are times where scaling the data is not desired. This addresses this problem in the different instrument functions that had previously had scaling hard-coded in.

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How Has This Been Tested?

Created new unit tests, ran functions with new functionality.

Test Configuration:

• Operating system: OS X Big Sur
• Version number: Python 3.9, 3.8
• Any details about your local setup that are relevant

Checklist:

• [x] Make sure you are merging into the develop (not main) branch
• [x] My commits are formatted appropriately (following the SciPy/NumPy style)
• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules
• [x] Add a note to Changelog.rst, summarising the changes
• [x] Add yourself to AUTHORS.rst

[coveralls]

Coverage increased (+13.6%) to 94.037% when pulling 5d0673bbc7b8fc50653f21bad48aabe78e5ce6b1 on no_auroral_scaling into c2f41824a4e3fb5f0b6efe475b7534d152763881 on develop.