GPS spacecraft are currently identified by their “Space Vehicle Number” (SVN) which now number 01 through 75. What will happen after 99 GPS satellites are launched? Is there any plan currently in place such as renumbering to 001 - 100+ or simply adding an extra digit?
This could happen soon enough due to 24+ satellites being launched by 2030 for the new GPSlll upgrade.
For those curious, I need to know in order to future proof some software...
Edit: While IGS and ANTEX files use a 3 digit SVN (or the equivalent of an SVN) these are related to the US government (and may do whatever they please?) all other places I have checked do not. Including: