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CONTENTS OF THE DIRECTORY

This directory contains observational data concerning the eclipses of the 
Galilean satellites of Jupiter from 1652 to 1983 . One will find:

1) - The file obs_eclips_jup.dat 

     Contents

       - file containing 16 802 observations of eclipse events on 284 
         oppositions of Jupiter since June, 1652 to November ,1983, 
       - these observations are made from 426 observatories,
       - it provides, 
	. the observed time of the mid-event (UT),
	. the type of the event D (disappearance) when the satellite went into 
          the umbra cone, R (reappearance) when it went out of the cone,
 	. the residuals O-C in seconds for the mid-event, 
	. the a priori uncertainty, sigma, in seconds, 
	. the time interval TQ, difference between the time of the last 
          speck (for the disappearance) or the time of the first speck (for 
          the reappearance) and the time of the mid-event (half brightness).
          It represents the semi-duration of the event.
	. the NSDB codes of the sites of observation and observer, as given in 
          the two files tab_vatoir_ec.dat and tab_vator_ec.dat.

     Reference 

         Further details on the original observations can be found in:
         - Lieske, J.H., 1986, Astron. Astrophys. Suppl. Series 63, 143-202. 
	 - Lieske, J.H., 1986, Astron. Astrophys. 154, 61-76.


         The O-C and TQ values are computed following: 
	 - Thuillot, W.: 1989, Prediction des phenomenes des satellites gali-
           leens, Note Scientifique et Technique du Bureau des Longitudes, S015 
         - Arlot, J.-E., 1982, New constants for Sampson-Lieske theory of the 
           Galilean Satellites of Jupiter, Astron. Astrophys. 107, 305.


     format

         This is a sequential file and each observation is given as a record of  
         132 bytes with the following format
         i5,4i3,f5.1,2x,a9,a1,f11.1,i5,i8,i6,i8,5x,a55
         with:

         - the observed time of the observation reduced to the mid-event
           in UTC with          the year                      i5  
			        the month                     i3
			        the day                       i3
                                hours                         i3
                                minutes                       i3
                                seconds                       f5.1,2x
         - the name of the observed satellite                 a9
         - the code of event                                  a1 
         - O-C in seconds 		                      f11.1
         - the a priori uncertainty sigma (sec.)              i5 
         - the interval TQ in seconds                         i8 
         - the code of the site                               i6
         - the code of the observer                           i8,5x
         - comments, and nature of the original observation 
           (first/last specks or mid-event)                   a55

2) - The file tab_vatoir_ec.dat

     Contents 

       - 426 names of the observational sites with the code of them.

     Format

         This is a sequential file with a recordsize of 36 bytes in the
         following format,

         - the name of the observatory   a26
         - characters "coded"            a5
         - le number of the NSDB code    i4

3) - The file tab_vator_ec.dat 

     Contents
 
       - 414 names of observers with the code of them.

     Format

         This is a sequential file with a recordsize of 30 bytes in the
         following format,

         - the name of the observer      a25
         - the number of the NSDB code   i4

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