Modernized GPS Satellite Fleet Now Complete

The eighth and final satellite in the modernized Global Positioning System Block IIR (GPS IIR-M) fleet has been delivered to the U.S. Air Force by Lockheed Martin. The final eight spacecraft, designated Block IIR-M, were modernized to enhance operations and navigation signal performance for military and civilian GPS users around the globe. More

(Source: Satnews.com - Mar 25)