hassan Could you move this ticket and the blocked ticket PIPE2D-365 to Sprint I?

I decided to make interpolation spectra at parameter resolutions of delta_Teff = 50 K, delta_logg = 0.25, delta_[Fe/H] = 0.25, and delta_[alpha/Fe] = 0.2. Therefore, I will divide the current parameter grids by five and 2 along Teff and log(g), respectively. Those of [Fe/H] and [alpha/Fe] do not change.

 
We require that a resolution of each parameter (step) is less than an equivalent change of a parameter to a 0.01 mag (=1%) of a color. 1% corresponds to the uncertainty in HSC photometries. 
The original steps of parameters are 250 K, 0.5, 0.25 - 1, and 0.2, in Teff, log(g), [Fe/H], and [Alpha/Fe], respectively. 
 
Synthetic colors, g-r and r-i, of AMBRE model templates with 6000K < Teff < 8000 as a function of each parameter (Teff, log(g), [Fe/H], [Alpha/Fe]) are shown in the figures.
Four parameter sets are over-plotted (black lines). They are extreme cases in each parameter. 
 


 
 
The parameter changes corresponding to 0.01 mag for the four cases are roughly 50 K (Teff), 0.25 (log(g)), 0.6 ([Fe/H]), and 2 ([alpha/Fe]). 
 

Fig: Parameter changes corresponding to a 0.01 mag color change. Only the 4 cases are shown.
 
 

If you have any comments, please let me know. I will make a parameter list table with these resolutions and then I will run an interpolation process for all the parameter grids. 

The interpolation process for all the parameter grids will be done in the main ticket.