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7.3| GEMPAK Objective Analysis: Sounding Data

Creating grid files from sounding data

Once a grid file has been created, objective analysis may be preformed on sounding data using OABSND.

New variables for OABSFC:

SNPARM         Level parameters indicies to be gridded
STNDEX         Special entire sounding indices to be gridded
VCOORD         Vertical coordinate for levels used
LEVELS         Levels on which to perform analysis

Note: Due to the large numbers of grids that may be generated when perfoming objective analysis on multiple parameters on multiple levels, you may have to run OABSND using several subsets instead of all desired combinations at one in order to avoid running your workstation out of memory!

Upper air stations are typically spaced at greater distances than surface data stations, so the grid spacings should be correspondingly greater for upperair data. Remember that data void regions can cause maximas and minimas to be displaced!

Lets put it to the test!

 


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