ENH: Model/Satellite Comparison Improvement

[jklenzing]

Migrated from pysat/pysat#246. From @rstoneback.

The method, satellite_view_through_model, needs to account for the fact that some variables are in log space, while others are in linear. See pull pysat/pysat#232 for first instance of the method.

[aburrell]

@rstoneback want to put this on you dev queue?

[rstoneback]

@rstoneback want to put this on you dev queue?

Sure, FYI I have the current pulls up to clear through, including the CDF and Seasons packages, plus ICON constellation + fix instantiation.

Supporting xarray via cdflib is also on my mind given the issues with loading 1d into pandas pysat/pysatNASA#102

Making progress but juggling 🐬

[aburrell]

No worries! I think there is enough done now to put together a release candidate for 0.2.0, so I moved this to a later milestone.

[rstoneback]

The next new thing I was thinking of adding was Dst, since it looked like the last thing needed for a new pysatSpaceWeather release.