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C3 EXTERNAL MODE SOLUTION OPTION PARAMETERS AND SWITCHES
*
* RP: OVER RELAXATION PARAMETER
* RSQM: TARGET SQUARE RESIDUAL OF ITERATIVE SOLUTION SCHEME
* ITERM: MAXIMUN NUMBER OF ITERATIONS
* IRVEC: 0 CONJUGATE GRADIENT SOLUTION - NO SCALING
* 9 CONJUGATE GRADIENT SOLUTION - SCALE BY MINIMUM DIAGONAL
* 99 CONJUGATE GRADIENT SOLUTION - SCALE TO NORMAL FORM
*
*
* IATMP: 0 DO NOT USE ATMOSPHERIC PRESSURE IN THE CALPUV SOLUTION
* 1 USE ATMOSPHERIC PRESSURE IN THE CALPUV SOLUTION IF NASER > 1
* IWDRAG: 0 USE ORIGINAL EFDC WIND DRAG FORMULATION
* 1 USE ORIGINAL EFDC WIND DRAG FORMULATION WITH RELATIVE WATER VELOCITY CORRECTION
* 2 HERSBACH 2011, EUROPEAN CENTRE FOR MEDIUM-RANGE WEATHER FORECASTS (ECMWF)
* 3 USE SIMPLIFIED COARE 3.6 APPROACH AT NEUTRAL ATM AND RELATIVE WATER VELOCITY CORRECTION
* DUMMY:
* ITERHPM: NOT USED
* IDRYCK: ITERATIONS PER DRYING CHECK (ISDRY.GE.1) 2.LE.IDRYCK.LE.20
* ISDSOLV: 1 TO WRITE DIAGNOSTICS FILES FOR EXTERNAL MODE SOLVER
* FILT3TL: FILTER COEFFICIENT FOR 3 TIME LEVEL EXPLICIT ( 0.0625 )
*
C3 RP RSQM ITERM IRVEC IATMP IWDRAG DUMMY ITERHPM IDRYCK ISDSOLV FILT3TL