[ncl-talk] Do I need poles to use vhaeC, vhseC, shaeC, shseC?

[Aaron Wang]

> Dear All:

> The online documentation for vhaeC and shaeC (Spherical Harmonics Analysis and Synthesis) says that the input arrays must be on Fixed grid, and Fixed grid may or may not include poles. Does that mean that I can have input data without poles into vhaeC?
> 
> I am asking this because ERA-Interim is not offset in zonal direction, but is offset in meridional direction. This troubles me when I want to use fo2fsh* on the ERA_Interim data to fill the poles, and then use the new fields in vhaeC or shaeC.
> 
> Thank you for your time.
> 
> Best Regards,
> Jih-Wang Aaron Wang