The STK Ephemeris Generator is a tool to convert trajectory files to a STK compatible format. The tool runs on Windows PC's and is straightforward to use. No manual is provided.
Simply locate the original filename, tell in which columns to find the data, give the units/frame/central body and the output filename (can be either STK ephemeris or STK planetary ephemeris format). Then, press the button to convert. Note that columns in the original file should be separated by at least one space or tab (no comma's).
To download the program, simply click here, and save the zipped program in your temp directory. Unzip the program and run the Setup program.