Seventh GPS Satellite

摘要

A Lockheed Martin-built, modernised Global Positioning System Block IIR (GPS IIR-M) satellite, equipped with innovative payload that will provide an on-orbit demonstration of a third civil signal, was launched on 24th March 2009 from Cape Canaveral Air Force Station (FL, USA). Designated GPS IIR-20(M), the satellite is the seventh in a line of eight GPS IIR satellites that Lockheed Martin Navigation Systems has modernised for its customer, the Global Positioning Systems Wing, Space and Missile Systems Center, Los Angeles Air Force Base (CA, USA).