Two ways for us…
We currently use the Python Skyfield package to translate TLE (Two Line Element) sets. Accurate, fine for just one satellite… but if you want to visualize trails, or many satellites, it's really slow.
I'm in the process of porting over SGP4 C code to VEX, but some calculations in it are meant to be in double precision… the time functions are useless without that… will either find a workaround, but since the Python method works, will wait for some day when we have 64 bit VEX in SOPs.
https://rhodesmill.org/skyfield/ [
rhodesmill.org]
https://www.danrw.com/sgp4/ [
www.danrw.com]