This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Sam, >From: Sam Ng <address@hidden> >Organization: UCAR/Unidata >Keywords: 200405272010.i4RKAdtK007391 >Dear Support, > > >I have 2 GEMPAK questions: > >1) When calculating a layer average or difference between 2 levels >(i.e., 800 and 300 mb), does GEMPAK takes into account the in-between >levels during its calculation? No, when you use LDF and GLEVEL=level1:level2 the solution is only for the specified levels, and not an integrated solution using all levels found in between. > >2) GDDIAG computes a diagnostic scalar grid and saves the result in a >GEMPAK grid file but is there a way to do the same thing but with a >vector (i.e. Qs and Qn) grid? You can store the components of the vector grid, using UR and VR or UN and VN. The components can be recombined later using VECR or VECN respectively. Steve Chiswell Unidata User SUpport > >Thanks, > >Sam Ng > > > >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > ~~~~~~~~~~~~~~~~~ >Sam Ng ~~~~~~~~~~~~~~~ >Research Assistant ~~~~~~~~~~~~ >Saint Louis University ~~~~~~~~~ >335 Macelwane Hall ~~~~~~~~ >3507 Laclede Ave. ~~~~~~~ >St. Louis, MO 63103 ~~~~~~~ >(314) 977-3133 FAX (314) 977-3117 ~~~~~~~ >address@hidden ~~~~~~ >http://www.eas.slu.edu/People/Students/SNg/index.html ~~~~~ > ~~~~ >"I had to search my memory as I looked into those eyes. ~~~ >Our lives change like the WEATHER but a legend never dies." ~~~ > ~~ > -- Jimmy Buffett ~ > -- NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publically available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.