HWM Neutral Wind Model from NSSDC
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下载链接：
https://cmr.earthdata.nasa.gov/search/concepts/C1214584433-SCIOPS.html
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资源简介：
The HWM87 is an empirical model of the horizontal neutral wind in the
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 NSI/DECNET.
提供机构：
SCIOPS
