Horizontal wind data in the mesosphere and lower thermosphere estimated from 
the meteor wind observation of the MU radar at Shigaraki (netCDF format)

Notes:

1. During three periods (2000/10/20-26, 2001/3/23-4/1, and 2001/7/8-15), the MU radar 
   was operated in alternate meteor and ionosphere observation modes, with 30 minutes 
   for meteor mode and 1 hour for ionosphere mode. Therefore, the number of meteors 
   becomes apparently smaller, compared to that of regular meteor wind observations, 
   and it varies with time. For example, the number of meteors of 'min00' data changes 
   discontinuously at 3n+1(n = 0, 1, 2,...7) hours in all heights.  

2. The wind data in 2004 are not available due to the problem of the MU radar 
   interferometer.

Description:

  The horizontal wind data in the mesosphere and lower thermosphere (70-110 km) estimated 
from the meteor wind observation of the MU rdar at Shigaraki MU Observatory in Shiga 
Prefecture, Japan (34.86N, 136.11E, 385m MSL). The wind data are calculated from the original 
observation data with a weighting function. They are stored in the netCDF (network Common Data 
Form) file named W(year)(month)(day).(resolution).nc or W(year)(month).(resolution).nc. The 
resolution abbreviations are h1t60min00, h1t60min30, h2t60min00 and h2t60min30. For example, 
the h1t60 means weighted average with Gaussian factors over +/-1 km in height and +/-60 minutes 
in time. The min00 shows that the center of the Gaussian window corresponds to 00 minute of 
every hour. The intervals of the wind data are every 1 km and 60 minutes. The netCDF file 
includes time, height, zonal and meridional winds, standard deviations of zonal and meridional 
winds, and number of meteors used for the weighted average of the horizontal wind.
  If you want to know more information of this data, please access the metadata URL.

Link to Metadata:

  http://www.rish.kyoto-u.ac.jp/mu/meteor/to_meta/mur-meteor-netcdf.html


Data revision:

  Initial version was released on July 30, 2012. 

Revision history:

30JUL2012  A. Shinbori  :  Updated metadata file.
30JUL2012  A. Shinbori  :  Initial version.