GPS III SV01
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About This Satellite
GPS III SV01 (Vespucci) is the first of the modernized GPS III navigation satellites, launched in December 2018. It broadcasts the new L1C civil signal alongside improved military M-code and more precise atomic timing for positioning users worldwide.
Source: Wikipedia — GPS Block IIIF (CC BY-SA 4.0)
GPS III SV01 is a cataloged satellite tracked under NORAD ID 43873 with international designator 18109A. According to the GCAT master catalog, it was built by LMSSD, on the A2100 platform, with a launch mass of about 4400 kg, with a shape described as Box + 2 pan. According to the TLE snapshot used when this page was generated (2026-08-18), its MEO orbit had an apogee of about 20.294 km and a perigee near 20.085 km, with an inclination of 55.72° and a period of roughly 718 minutes; at apogee its speed was about 3.86 km/s. Positions on this page are near-real-time SGP4 predictions propagated from the latest two-line element (TLE) data.
In the TLE snapshot used to generate this page, GPS III SV01's apogee was 20.294 km, where its speed was about 3.86 km/s, completing about 2.0 orbits of Earth per day. Track it live on the map above or in the JOT orbital map.