GEMPAK Online Tutorial > GEMPAK Objective Analysis
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!
GEMPAK Online Tutorial > GEMPAK Objective Analysis