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3DVAR Changes
CURRENT NEW
vertical coarse pressure exact model eta coordinate
coordinate
horizontal coarse unstaggered higher resolution unstaggered
coordinate grid grid
balance weak constraint on balanced variable separated from
thermal wind unbalanced variables
analysis stream&potential function balanced: stream function
variables temperature, ref height unbalanced: potential function,
temperature, sfc pressure
background 17 parameters 5 parameters tuned with year of
error forecast errors (48-24) using both
parameter estimation & brute force
Has been running in real-time 48 KM Parallel