Globalstar’s satellite ground station expansion program has continued into South Korea.

The Apple-backed satellite operator this week announced the installation of three new six-meter C-3 tracking antennas at its ground station in Yeo Ju.

“With Yeo Ju, Globalstar has now announced construction projects related to its third-generation C-3 system that are ongoing at 15 different locations in nine countries on four continents,” said L. Barbee Ponder, general counsel and VP of regulatory affairs.

The expansion is part of a global initiative to deploy more than 90 additional tracking antennas supporting its third-generation C-3 mobile satellite system across 35 ground stations spanning 25 countries and territories.

Ground station expansion work has started at sites in Estonia; Clifton, Texas; Singapore; Castilla La Mancha, Spain; Bihoro, Japan; Nemea, Greece; Talkeetna and Wasilla, Alaska; multiple sites across Brazil; and High River in Alberta and Smiths Falls in Ontario, Canada.

Launched in 1991 as a joint venture of Loral Corporation and Qualcomm, Globalstar's first-generation constellation consists of 48 LEO satellites, with an additional four satellites in orbit as spares, while its second-generation constellation comprises 24 spacecraft.

Globalstar counts Apple as an investor. The company uses the satellite firm's services to power some direct-to-cell services on its iPhones. Elon Musk’s SpaceX is reportedly exploring a potential takeover of the company.