Custom Header Height for Twenty Ten Theme

As we work on the theme for Ascended Master Events page, I found the need to specify another height of the header image of the theme Twenty Ten, this is possible by copying the twentyten_setup function that is in the functions.php and pasting it in the functions.php of the child theme and then specifying the desired height using HEADER_IMAGE_HEIGHT

This is very well explained in the post Replace Default Header Image Twenty Ten Theme