Cheolian

Cheolian (Zhenian: 천리안), formally the Cheolian Global Satellite Navigation System (Zhenian: 천리안 전지구위성항법체계), is a space-based system owned and operated by the Zhenia Space Agency, constructed primarily under Zhenian leadership but involving international participation in the construction of its components as well. It provides global coverage for and  via radionavivigation-satellite services with those that have a receiver that is covered by in theory three or more Cheolian satellites in. Although the system originally started out as a more regional satellite navigation system suited for Tarsis and the Hanmaric Ocean, the program shifted into providing global coverage of satellite navigation in the late 1580s.

While development of a primarily Zhenian navigation system had been on the nation's agenda as a concept since the Third Republic under the Kim Shimin administration, the project itself materialized after the November Revolution, as a notional "constellation" of satellites in geostationary orbit providing global coverage of locational and time data. Several rocket launches since the late 1570s added several satellites into orbit, with the initiation of service on September 29, 1590. The system has remained near the top of the Zhenia Space Agency's agenda since its initiation of service, receiving several batches of upgrades over the years to improve capacity and coverage across its service area.