HWM Neutral Wind Model from NSSDC

BRIEF

upper thermosphere analogous to the MSIS model for neutral temperature and density. It is based on wind data obtained from the Atmosphere Explorer E and Dynamics Explorer 2 satellites. A limited set of vector spherical harmonics is used to describe the zonal and meridional wind components. The data base was not adequate to detect solar cycle effects but the model does include magnetic activity effects. Mid- and low- latitude data are reproduced quite well by the model. The polar vortices are present, but not to full detail. Currently the model is intended for winds above 220 km altitude; it does not include altitude variations. The model software provides zonal and meridional winds for specified latitude, longitude, time, and Ap-index. The model code is distributed by NSSDC on magnetic tape, on diskettes for use on PCs, and online on SPAN.

ATTRIBUTES

Entry_ID: HWM87 MODEL (MD Identifier: 1667)
 
Storage Media:
     Diskette (3 1/2, 5 1/4 inch), 150 KBytes
     MAGNETIC TAPE, 150 KBYTES
 
Discipline, Subdiscipline:
     EARTH SCIENCE                   > ATMOSPHERE
 
Location Keyword:
     GLOBAL
 
Parameter Group, Parameter:
     ATMOSPHERIC DYNAMICS            > WINDS
     NEUTRAL PARTICLES               > SPEED
 
General Keywords:
     HWM87
     IDN_NODE GSFC/NSSDC
     WINDS
 
Revision Date: 1992-03-10

DATACENTER

Archive: 
   NSSDC>National Space Science Data Center, NASA
   Data Set ID: MN-62 
 
   Contact: COORDINATED REQUEST & USER SUPPORT OFFICE,  
            National Space Science Data Center
            Mail Code 633.4
            NASA/Goddard Space Flight Center
            Greenbelt, MD 20771
            USA
 
            Electronic Mail: INTERNET> request@nssdca.gsfc.nasa.gov
                             NSI/DECNET> 15548::REQUEST
                             NSI/DECNET> 15578::REQUEST
 
            Phone: (301) 286-6695
                   FAX (301) 286-1771

PERSONNEL

Investigator: HEDIN, ALAN E.
              NASA/Goddard Space Flight Center
              Code 614
              Greenbelt, MD 20771
              USA
 
              Phone: (301)286-8393
 
Entry Author: BILITZA, DIETER 
              Code 933.9
              Goddard Space Flight Center
              Greenbelt, MD 20771
              USA
 
              Electronic Mail: NSI/DECNET> NCF::BILITZA
 
              Phone: 301-286-9536
                     301-513-1664
 
 
Information in this entry provided by NSSDC

REFERENCE


A.E. Hedin, N.W. Spencer, and T.L. Killeen, Empirical global model of
upper thermosphere winds based on Atmosphere and Dynamics Explorer
satellite data, J. Geophys. Res., 93, 9959-9978, 1988

SUP_MENU

   1. Data Center: NSSDC>National Space Science Data Center, NASA