Spire engineer Shaina Johl runs tests on a Spire cubesat, the NanoRacks-LEMUR-2 qualification model, prior to its June 2017 launch from Orbital ATK’s Cygnus spacecraft. Credit: Spire Global

AUSTIN, Texas – Spire Global, the San Francisco-based company that operates 48 GPS radio occultation cubesats, could provide a persistent view of about 97 percent of Earth with a constellation of 150 satellites, said Alexander “Sandy” MacDonald, Spire’s global validation model director.

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Debra Werner is a correspondent for SpaceNews based in San Francisco. Debra earned a bachelor’s degree in communications from the University of California, Berkeley, and a master’s degree in Journalism from Northwestern University. She is a recipient...