Introduction - If you have any usage issues, please Google them yourself
Nowadays, there are three positioning systems existed in the world, but each of them has its own time system and coor2
dinate frame, which may result to much inconvinentwhen data p rocessing or data fusion. So that, we should do some effective transfor2
mation among these three systems, including time system and coordinate system. For the requirement, the time system and coordinate
system for each of them are analyzed in details. And then, the method of time transformation and the model of coordinates transforma2
tion among GPS, GLONASS and GAL ILEO are p roposed based on lots of integration, certification and calculation. Additionally, the
result of these methods can meetmost of users’demands absolutely.