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                         IMCCE - Observatoire de Paris

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		   	            /pub/PODB

	  		Astrometric Planetary Data Base APDB
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The creation of modern ephemerides involves the fit of the planetary theories 
to a wide variety of astronometric measurements.
This ftp server adds complementary sets of observations to the 
JPL-Planetary Ephemeris Data site.
This last contains all the data used by the JPL for the adjustement of their 
numerical integrations on a 1911-1995 period. 
This data set is limited to very accurate and recent observations.
The main interests of this following collection is the period covered by 
the observations, more than 2 centuries, and the diversity of the data 
(in the observational techniques, but also in the location of the observatories).

This data base, supported by the IAU commission 4, is organised by planets, 
types of observations, and instituts.

CONTACT :  Agnes Fienga 

ADDRESS  : IMC / Bureau des Longitudes, 77 av. Denfert Rochereau, F-75014 PARIS
            Tel.: (33 1) 40 51 22 74   
            Fax  : (33 1) 46 33 28 34
       	    Email : fienga@imcce.fr 

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			APDB Structure

=======================================================

	The ftp server of APDB consists in the following:


=======================

	0- format.txt      give the general format of all these files.

=======================
	1- /HILTON/
=======================

	In this directory, one can find transit observations of :

  JUPITER/      
  MARS/                
  MERCURE/        
  NEPTUNE/       
  SATURNE/  
  URANUS/  
  VENUS/                  

	on a general period of more than 2 centuries (1750-1997).
	In each directory, tha data set is divided by instrument

  resume.txt     contains, in each directoy, a summary of the instruments 
	         used and the periods covered by each instrument can be found.

	Furthemore, /HILTON/ contains the global data set per planet, each
	file containing the same data than in the previous directory.
	These files are the following:

  jupiter.dat    555 Kb    Fri Nov 20 10:54:00 1998 
  mars.dat      1149 Kb    Fri Nov 20 10:54:00 1998 
  mercury.dat   2125 Kb    Fri Nov 20 10:55:00 1998 
  neptune.dat   1030 Kb    Fri Nov 20 10:55:00 1998 
  ref.mail        17 Kb    Fri Nov 20 10:55:00 1998 
  saturn.dat     931 Kb    Fri Nov 20 10:55:00 1998 
  sun.dat       9041 Kb    Fri Nov 20 10:55:00 1998 
  type.instr       4 Kb    Fri Nov 20 10:55:00 1998 
  uranus.dat    1267 Kb    Fri Nov 20 10:55:00 1998 
  venus.dat     4451 Kb    Fri Nov 20 10:55:00 1998 
 
	
  Reference.txt   give the list of all the references where
	          the data were published.
	
=======================
        1- /URSS/
=======================

        In this directory, one can find :
	
	
  EXPLAIN/                             Fri Nov 20 11:00:00 1998 Directory
  JUPI/                                Fri Nov 20 09:48:00 1998 Directory
  MARS/                                Tue Feb  9 19:15:00 1999 Directory
  MERC/                                Mon Feb  8 19:11:00 1999 Directory
  NEPT/                                Fri Nov 20 09:48:00 1998 Directory
  SATU/                                Fri Nov 20 09:48:00 1998 Directory
  URAN/                                Fri Nov 20 09:48:00 1998 Directory
  VENS/                                Wed Jan 27 17:33:00 1999 Directory

	
  EXPLAIN/ is the directory of references containing all the references 
	   where the data were published.

  The other directories contain the data per planet. They are organised
  by techniques of observations and instruments.
  
Examples:

  JUPI/
    GRAF-5.OPT      ascii representation of the data distribution 
		    per type of observations end instruments.                                   
    PHOTO/          contains the photographic observations                 
    TRANSIT/        contains the transit observations                                             
    resume.opt.txt  contains, for optical data, a summary of the instruments
                    used and the periods covered by each instrument can be found.
MARS/
  GRAF-4.OPT                                         2 Kb    Fri Nov 20 10:58:00 1998 
  PHOTO/                                                     Thu Feb 18 15:56:00 1999 Directory
  RADAR/                                                     Thu Feb 18 15:56:00 1999 Directory
  TRANSIT/                                                   Thu Feb 18 15:56:00 1999 Directory
  resume.opt.txt   contains, for optical data, a summary of the instruments
                   used and the periods covered by each instrument can be found.
  resume.radar.txt contains, for radar data, a summary of the instruments
                   used and the periods covered by each instrument can be found.