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<H4>PUBLIC INTERFACE</H4>
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<PRE>

use ras_mod [,only: ras_init, ras, ras_bdgt]

ras_init  - Called once to initialize ras. Also reads namelist.
            Must be called before ras.

ras       - Driver for ras module

ras_bdgt  - Optional debugging tool. Can be called to do budget checks
            for tendencies computed in ras.

Notes:
 * A namelist interface ( &ras_nml ) controls runtime options.

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