Originally Posted by
PerfInit
The “backup” plan is still ground-based navigation, VOR’s. With NextGen implementation, there is a Minimum Operational Network (VOR MON) that will be maintained. For FMS that revert to DME/DME/IRU updating with the loss of GPS, there will also be aMinimum number of DME stations
Yes. They have to maintain a ground-based backup. Every single GPS satellite flies over every single one of our potential antagonists, several of which have asat capability. If so inclined, they could probably splash the entire constellation in a few days.