This C-version of the JPL Ephemeris Export Package was written by the 
referenced person.  He offered it to me, and I include it here, but 
otherwise I have no knowledge of it.

Myles Standish


*******************************************************************************
*          Kourosh Arfa-Kaboodvand (Aero-Space Engineer)                      *
*          Technical University of Darmstadt                                  *
*          Institute for Physical and Astronomical Geodesy                    *
*          Petersenstr. 13                                                    *
*          64287 Darmstadt                                                    *
*          Germany                                                            *
*                                                                             *
*          Email: KOUROSH@ipgs.ipg.verm.th-darmstadt.de                       *
*******************************************************************************


INSTRODUCTION:
JPL-Planetary and Lunar Ephemeris.

1) Create Binary file from an Ascii file (i.e. asc1980.200 etc.):

   Remarks: Before starting the asc2eph.exe one have to change all the 
            Double precision extensions D via an Editor programm to E.   
 
  a) Insert the name of the Ascii file (which should be written in Binary 
     format) at the end of the corresponding Header file. Actually the Header 
     file includes all the relevant names and values for the constants of the 
     reference set of data. Besides it includes the computational indizes. 
     For more infos see the file header.200 which contains all the importants 
     values for the DE-LE200 set of ephemeris. remarks: the values in the 
     header file are a function of the relevant set of the ephemeris.
  b) Start the program ASC2EPH.
  c) Enter the name of the header file (i.e. header.200).
  d) Enter the value of the start epoch ( Should be within the time span of 
     ascii file. see header file).
  e) Enter the value of the end epoch ( Should be within the time span of 
     ascii file. see header file).
  f) Enter the name of the output Binary file.

2) Merge two Binary files together:
  a) Start the program MERGE.
  b) Enter the name of the first Binary file.
  c) Enter the name of the second Binary file. remarks: The end epoch of the 
     first file should equal to the one of the start epoch of data set in the 
     second file)
  d) Enter the name of the output Binary file name (merging file).

3) READ a created Binary file:
  a) Start the READ program.
  b) Enter the name of the Binary file.

4) Test the precision of ephemeris computation and compare the results with the 
   testing datas from JPL:
  a) Start the TEST program.
  b) Enter the name of the Binary file.
  c) Enter the name of the testing file (i.e. testpo.200)
  d) Enter the name of the comarison output file.

5) Example program to show the implementation of interpolation subroutines:
  a) Start the program TEST1.
  b) Enter the name of the binary file.
  c) Enter the Julian date (JD should be within the binary file).
  d) Choose the number of the target planet.
  e) Choose the number of the reference centre.
  f) Choose the unit (Km or AU).
  g) Choose the definition of Barycentre.


REMARK: 115-230.198 :  BINARY FILE (ASC1980.200) FROM DATA SET 115 TO DATA 
                       SET 230 (2447856.5 to 2451568.5)
