Jet transport weight estimation model

[eytanadler]

Purpose

Jet transport weight estimation needed tuning, organization, testing, and readable docstrings.

Type of change

What types of change is it? Select the appropriate type(s) that describe this PR

• New feature (non-breaking change which adds functionality)

Testing

Explain the steps needed to test the new code to verify that it does indeed address the issue and produce the expected behavior.

Checklist

Put an x in the boxes that apply.

• [ ] I have run unit and regression tests which pass locally with my changes
• [ ] I have added new tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation