Pin versions in environments

In anticipation of SimPEG updates, pin versions of SimPEG, discretize, geoana and pymatsolver used to generate these results.

Updates with revisions of paper

Minor updates with paper revisions

• test on python 3
• add index notebook with an overview of the notebooks in this repository

index notebook, SimPEG updates

• update readme to include more description on running the notebooks
• rely on the most recent version of SimPEG and make corresponding changes
• add an index notebook with an overview of the contents in the repo

Open source software for simulations and inversions of airborne electromagnetic data

This is the initial release of the Jupyter notebooks used to generate the figures shown in "Open source software for simulations and inversions of airborne electromagnetic data" by Lindsey J. Heagy (@lheagy), Seogi Kang (@sgkang), Rowan Cockett (@rowanc1) and Douglas W. Oldenburg (@dougoldenburg). This abstract was submitted to the AEM 2018 workshop on Airborne Electromagnetics.