After that, the Space Force will begin fielding a more capable follow-on, GPS IIIF. It would invest an additional $15 million to increase resiliency in the GPS constellation and $30 million to develop alternative PNT capabilities. The Space Force is discussing ways to add more resiliency features to those spacecraft with Lockheed. A spokesperson for Space Systems Command did not respond to a request for more details by press time. Disaggregating PNT capabilities by using orbits besides MEO, where GPS satellites currently reside, is one way to potentially secure the capability.