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CONTENTS OF THE DIRECTORY

This directory contains observational data concerning the 333 observed 
photographic plate in positions of the Uranian satellites. One will find:

1) - File obs_uranus_nsdb.dat

     Contents
       -  File containing 333 observed photographic plate in positions of the 
          Uranian satellites made on 5 oppositions by a group of observers,
          Veiga, C. H. and Vieira Martins, R, from 1 site from June,  1983 on 
          August,  1988,
       - It provide, 
          . the date in UTC (year, month, day),
          . the code of the reference frame,
                          1 = true equator and equinox of date
			  2 = mean equator and equinox of B1900
			  3 = mean equator and equinox of B1950
          . the code of center of observed body,  0, relative to Uranus
                                                  4, relative to Oberon
          . the code of the observatory, 718 = Rio de Janeiro Observatory,
          . the X equatorial coordinates 1950.0 for the satellites 1, 2, 3, 5
          . the Y equatorial coordinates 1950.0 for the satellites 1, 2, 3, 5
          . the plate scale in arcseconds per millimeter,
          . the number of the plate,
          . the number of the series,
          . the number of the opposition.

     Reference 
         These observations are extracted from,
         - Veiga, C. H., Vieira Martins, R, 1994a, Astron. Astrophys., 
           Suppl.Series, 107:,551-558.
         - Veiga, C. H., Vieira Martins, R, 1994b, Astron. Astrophys., 
           Suppl.Series, 107:,559-561.
         - Veiga, C. H., 1995 , Astron. Astrophys., Suppl.Series, 111:,  1-6.
 
       Format 
         This is a sequential file and a record contains 126 bytes with the 
         following format,

         i5      the year,
         4i3     the month, the day, minutes,
         f5.1    seconds,
         i3      the code of reference frame,
         i2      the code of center of observed body,
         i6      the code of number of the site,
         f10.2   the X equatorial coordinates for the satellite 1, in arcseconds
         3f8.2   the X equatorial coordinates for the satellites 2, 3, 5,
                 in arcseconds, or - (a8) if absent coordinate
         f9.2    the Y equatorial coordinates for the satellite 1, in arcseconds
         3f8.2   the Y equatorial coordinates for the satellites 2, 3, 5,
                 in arcseconds, or - (a8) if absent coordinate
      	 f8.2    the plate scale in arcseconds per millimeter,
         i5      the number of the plate,
         i5      the number of code of the observers in this file, 1062 from  
                 Veiga, C. H. Veiga, C. H., 
         i4      the number of the series,
         i4      the number of the opposition.

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