Hajime Kawahara

partly #350

Analytic estimate of the error of line strength using PreMODIT Elower grid:  no dependence on Elower_line


I find that I have not checked if a simple T gird instead of Elower in PreMODIT works or not. We'll see.

## Errors in LSD as a function of `interval_contrast ` Tguess = 1000K, comparison with MODIT LSD | T (K) | ic=0.1 | ic=0.2 | ic=0.3 | | ------------- |...

The above results are completely consistent with the analytic estimate (elower_grid.ipynb) - ic=0.2 case 

## short summary # interval_contrast - the errors from the comparison with MODIT (H2O/POKAZATEL) can be reproduced by the analytical model. So, the reason is from the deviation of the...

I think I did improve the memory use of the E lower grid (Note that we need to multiply 2 to NE to compare the memory use because the derivative...

implemented and PR in #332

Addressed in #332