JPL ephemeris from before 1990 for orekit-data.zip

1

Hello,

I am unsure where to download JPL ephemeris data from before 1990 (back to the 1960s) in the correct format for the orekit-data.zip file. Can anyone help? Thank you!

Erin

2

Hello @erinf,

You can check the supported data types here (assuming you are using the 13.1.5 version) : Supported data types – Orekit

You most likely want to check out data available here: Public FTP File Browser

Cheers,
Vincent

3

Also note that one of the undocumented tutorial, DEFile.java, allows to read a big DE file and truncate it to a shorter time range. This is how we originally truncated the huge JPL file that covers several tens of thousands of years into the one we ship in orekit-data.