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; Release note  		                                    September 26, 2011
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Version 1.1.1 (September 26, 2011)
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1. Since several text files (version 1.1) listed below contained data gaps and 
   incorrect data, we replaced them with correct ones.

   1-month text files
   Wk200701.h4t60min00.txt, Wk201107.h2t60min30.txt, Wk201107.h4t60min30.txt

   1-day text files
   Wk20110714.h2t60min30.txt, Wk20110714.h4t60min30.txt,
   Wk20110729.h2t60min30.txt, Wk20110729.h4t60min30.txt

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Version 1.1 (July 29, 2011)
============================

1. Because there were several problems of the method to derive the horizontal wind
   from the original data, the text files contained the incorrect data. We solved 
   these problems, and made the text files for all the periods again.
   
[Problems]
  (1) Due to the lack of the original data for the last 30 minutes of the previous 
      month and for the first 30 minutes of the next month, the first and last hour 
      data of each month was incorrect.

  (2) The wind data for the last 1-2 hours of several files have been lost due to 
      the failure to delete the extra data.

  (3) Because the 'int2' value exceeded the output range specified in the program, 
      we could not derive the correct value for several files.
 
  (4) Number of meteor trails used to determine the horizontal wind for July 1-6, 2006
      was extremely larger than the usually observed values since we incorrectly used
      the same data files four times for the derivation of the horizontal wind.

2. We added text files of each day.

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Version 1.0 (June 13, 2011)
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1. 1-month text data were released on June 13, 2011.