Small satellites meant to improve the way the U.S. measures Earth’s magnetic field—an option to expand the military’s position, navigation, and timing enterprise—launched March 30 from Vandenberg Space Force Base, Calif.
GPS alternatives
The jamming of GPS signals around Ukraine has become so severe it is even affecting satellites up to 1,200 miles above the Earth’s surface—a striking example of why the Space Force and the Pentagon are moving to bolster the ubiquitous service, experts say.