Leica GPS1200 Series Technical Reference Manual page 743

Relevance for GPS
An unknown backsight point can be used to set up a TPS1200 instrument. After finishing the
TPS job, the coordinates of the unknown backsight point can be determined using GPS1200
with the CompactFlash from the TPS1200 instrument. When assigning the same point ID of
the unknown backsight point to a point measured with GPS1200, the TPS setup and all
related calculations can be updated on GPS1200.
Update Setups GPS1200 743