The memory window supports second order, fourth order, and sixth order numerics. For each order numerics, the memory window is configured to contain the minimum number of latitude rows to solve the equations. For second order numerics, three rows are needed, five rows for fourth order, and seven rows for sixth order. The extra rows are used as buffers to hold data needed to solve equations on the central row within the window. If option max_window is enabled, the memory window is opened up all the way to hold all rows. For more detail, refer to Section 11.3.4.