Bill,

I have downloaded the codes and implemented them in Visual Basic.net. I have
written a small program that displays the information for 5 satellites and
added a few features. My results from tests are right on the money with
yours. I also tested the execution time and found that between sgp, sgp4 and
sgp8, the time were almost the same, milliseconds difference, pretty
efficient. I have not done the deep codes yet but will tackle them soon.
VB.net is now the same as C++ or very close which make it fairly easy to
implement C code. Learning the new language and features combined with
playing with your codes has been very interesting.

Denis