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How to set up and run TERRAIN with Expanded model domains:

 IEXP = .T., ; .T. EXPANDED COARSE DOMAIN, .F. NOT EXPANDED.
             ; USEFUL IF RUNNING RAWINS/little_r
 AEXP = 360., ; APPROX EXPANSION (KM)

• Note that the model domain has been expanded by 360km.
• The domain size will be cut back down to its normal size after the OA (LITTLE_R/RAWINS) step.
• The model domain will be expanded by 360km (AEXP) only when IEXP is set to TRUE.
• ONLY domain1 will be effected by this setting.

  Why would one do this?

Expanding the model domain, allow you to take upstream observations into account during the OA step, which would normally have been excluded.

	If your model grid size is 10 km, setting AEXP=360, will expand your model grid by approximately 36 grid points in EACH direction, making the number of grid points in the X and Y directions approximately 72 larger - which may result in memory overflow.
	If you do not plan on running OA (LITTLE_R/RAWINS), setting IEXP to TRUE has NO benefit.