This has the binary version of the file, which this class does not parse
http://tdc-www.harvard.edu/software/catalogs/ppm.html
The actuall ascii file is from nasa
ftp://legacy.gsfc.nasa.gov/heasarc/dbase/dump/heasarc_ppm.tdat.gz
The Vsop class wraps the VSOP87 data and provides VSOP support fns
Source from
http://www.projectpluto.com/source.htm#cpp_version
http://mhuss.com/AstroLib/AstroCpp.zip
Based on Bill Gray's open-source code at projectpluto.com
Table layout based on Bill Gray's open-source code at projectpluto.com
Data available from appendix in Meeus' "Astronomic Algorithms"
This data is used to calculate the locations of the planets for any
point in time.