Time-height plot of horizontal wind data in the mesosphere and lower thermosphere 
estimated from the meteor wind observation of the MU radar at Shigaraki (gif 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 time-height plot of 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). File names are 
composed of date and variable abbreviation: W(year)(month)(day).(resolution).gif (daily 
plot), W(year)(month).(resolution).gif (monthly plot) and W(year).(resolution).gif (yearly 
plot). The resolution abbreviations are h1t60min00, h1t60min30, h2t60min00 and h2t60min30 
(please refer to the readme file of text or netCDF data for details of the resolution 
abbreviations). These plots are made using the netCDF data of each resolution in time and 
height. For yearly plot, only the h2t60min00 and h4t60min00 data are used and averaged for 
each day. The daily average is done if there are more than one valid data in all of the four 
time zones (0-5, 6-11, 12-17 and 18-24 h). 
  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-gif.html


Data revision:

   Initial version was released on July 30, 2012.

Revision history:

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