Unidata - To provide the data services, tools, and cyberinfrastructure leadership that advance Earth system science, enhance educational opportunities, and broaden participation. Unidata
         
  advanced  
 
Previous: GEMPAK Objective Analysis: Surface Data Next: GEMPAK Objective Analysis Exercises Table of contents Frames User Manual GEMPAK Online Tutorial > GEMPAK Objective Analysis

19.2 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!

 


Previous: GEMPAK Objective Analysis: Surface Data Next: GEMPAK Objective Analysis Exercises Table of contents Frames User Manual GEMPAK Online Tutorial > GEMPAK Objective Analysis

 
 
  Contact Us     Site Map     Search     Terms and Conditions     Privacy Policy     Participation Policy
 
National Science Foundation (NSF) UCAR Community Programs   Unidata is a member of the UCAR Community Programs, is managed by the University Corporation for Atmospheric Research, and is sponsored by the National Science Foundation.
P.O. Box 3000     Boulder, CO 80307-3000 USA     Tel: 303-497-8643     Fax: 303-497-8690