Example and description of the header for the ascii ephemerids file. 

Name of the ascii files :
- xxx_pos_xxx (position)
- xxxx_vel_xxx (velocity)


Example of the header for the ascii ephemerids file :
-----------------------------------------------------

version :   
EMB barycenter equator position m      3           13          16        4684  0   0.0   0              2414073.00 0             2489017.00 0 
             2414073.00             2414089.00-0.3440436094681799D+11 0.1963703381746351D+11 0.1607927202540213D+09-0.1491781445664509D+08-0.4688147449434721D+05 0.2988432470468375D+04-0.1042050875150240D+01-0.2579028789813702D+00-0.3799673227163462D-01 0.1743023212139423D-02 0.1175513634314904D-02 0.1572829026442308D-03 0.5135169396033654D-05


Explanation of each record (or line):
-------------------------------------

Header first record : self explanatory
---------------------

Header Second record : 
----------------------
Body      values : [Sun, mercury ...., Neptune, Moon] 
Origin    value  : [Barycenter] meaning BCRS
Frame     value  : [equator]    meaning ICRF
Type      values : [position, velocity]
unit      values : [AU, AU/day, km, km/day, m, m/s]


dimensionality   integer      number of line per interval of time ( here this  3 is for x, y, z or vx, vy, vz, 1 for TT-TDB)
                                  


order         integer      number of coefficients for each interval and each scalar quantity
                              notice that order = degree + 1
                 
span          real         length in days of the standard intervals of each period covered with one expansion

N_s           integer      number of standard intervals of length span in the file 
              

0            integer       (unused, always 0)


0.0          real          (unused, always 0.0)

0            integer       (unused, always 0)

           
Jd_beg        days         first date of validity of the file in julian days 
                           given in two doubles with integral part and then fractional part.

Jd_end        days         last date  of validity of the file  in julian days
                           given in two doubles with integral part and then fractional part.

                           notice : this is not an independent parameter, but this is useful
                           to test that the date of call is always inside this interval.                           

                           
Body of the file
----------------
Each record contains :
- Jd_beg        days      first date of validity of the record
- Jd_end        days      last date of validity of the record
- the n Chebyshev coefficients (n = order) for one scalar component within an interval of length span.
There are in total in each file dimensionality*N_s records (or lines) with the coefficients.