[iamdumbman]

Can't believe there isn't already a system which is capable of offering error within 1 millimetre.

[coldtea]

Can't believe?

Because triangulation with signals from orbit passing through the atmosphere is trivial?

[iamdumbman]

I am not taking about GPS.

I need GPS like system with satellite confined in a room capable of resolution within 1mm error.

[choot]

I think there are several systems like LIDAR with less a millisecond error.