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CONTENTS OF THE DIRECTORY

This directory contains the observational data of the relative positions of the
satellites of Saturn occurring from 1874 to 1984. One will find:

1) - The file obs_rela_satu.dat

     Contents: 
       - 20686 observations observed from July 1874 until August 1984,
       - they are observed from 17 sites by 17 observers on 71 oppositions, 
       - the file provides one record for each individual observation.

     References:
         These observations are described in,
         . Strugnell P.R. and Taylor D.B.: 1990, A catalogue of ground-based 
           observations of the eight major satellites of Saturn, 1874-1989,
           Astron. Astrophys. Suppl. Ser. 83, 289-300.

     Format:
         This is a sequential file and each observation is given as a record of 
         127 bytes with a following format,

                the date in UTC,
                   i5    the year,
                   3i3   the month, the day, minute,
                   f5.1  second,
                i3    the reference frame 0 = Mean equator and equinox  B1950
                                          1 = True equator and equinox of date
                                          2 = Mean equator and equinox J2000
                a2    the code of the origin
                                          0      for Saturn
                                          1 to 9 for the satellite
                i3    the number of the observed satellite                            
                f13.6 first observed coordinates
                            a10 coordinate absente(-)
                f13.6 second observed coordinates
                            a11 coordinate absente(-)
                f5.1  O-C from the 1st coordinates
                            a7  coordinate absente(-)
                f10.1 O-C from the 2nd coordinates
                            a10 coordinate absente(-)
                13x    plate scale, unknown at the present time
                   2x
                i4    the code of the name of the observer
                   3x
                i5    the number of the series
                   2x
                i5    the number of the opposition
                i6    the code of the site
                   2x
                a10 so,
                   a6 the type of the coordinates 
                                . Separation [S] and/or Position angle [P]
                                . Tangential R.A. Da(cos(dec)) [DA] 
                                  and/or tangential Dec.[D]
                                . Delta(a) [Da] OR/AND Delta(d) [Dd]   
                                  AND    Alpha and/or Delta
                   a4 the units of the coordinates
                a6    the origin of the reference frame 
                               . topocentric
                               . geocentric

2) - The file tab_vatoirela_satu.dat

     Contents: 
       - This file contains the 17 names of the sites with the code of them.

     Format:
       - This is a sequential file with a recordsize of 36 bytes with the 
         following format,

         the name of the site         a26,
         "coded"                      a5
         the code of the site         i5.

3) - The file tab_vatorela_satu.dat

     Contents: 
       - This file contains the 17 names of the observers with the code of them.
         For the same name, there are various codes because it is not the same
         opposition. 

     Format:
       - This is a sequential file with a recordsize of 37 bytes with the 
         following format,

         the name of the observer     a26,
         "coded"                      a5,
         the code of the observer     i5.

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