The launch last month of Orbital Watch, the new Space Force program to share declassified U.S. government threat intelligence with private sector satellite operators and other commercial space companies, comes amid increasing concern about Chinese and Russian development of anti-satellite weapons. 
For the Space Force and the U.S. writ large, the mission of position, navigation, and timing has become synonymous with three letters: GPS. That is likely to change in the coming years, as service officials described plans this week for a whole host of alternative ...