Image Library
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![Diagram of the GPS constellation orbiting the Earth](https://webarchive.library.unt.edu/eot2008/20090512001858im_/http://pnt.gov/101/gps-constellation.gif)
GPS Constellation
![Artist's rendering of a Block II satellite over the Earth](II-IIA-sm.jpg)
GPS Block II/IIA: Original operational satellite design
![Artist's rendering of a Block IIR satellite over the Earth](IIR_2-sm.jpg)
GPS Block IIR:
Replenishment satellite design
![Artist's rendering of a Block IIR satellite](IIR-sm.jpg)
GPS Block IIR:
Replenishment satellite design
![Artist's rendering of a Block IIR-M satellite over the Earth](IIR-M-sm.jpg)
GPS Block IIR-M:
Replenishment satellite design with
Modernized features
![Artist's rendering of a Block IIR-M satellite over the Earth](IIR-M_2-sm.jpg)
GPS Block IIR-M:
Replenishment satellite design with
Modernized features
![Photo of rocket launching](launch-dec07-sm.jpg)
Launch of the fifth IIR-M satellite on December 20, 2007
![Photo of rocket launching at night](launch-mar08-sm.jpg)
Launch of the sixth IIR-M satellite on March 15, 2008
![Photo of rocket launching](launchmar09sm.jpg)
Launch of the seventh IIR-M satellite on March 24, 2009
![Artist's rendering of a Block IIF satellite over the Earth](IIF-sm.jpg)
GPS Block IIF:
Follow-on satellite design
![Artist's rendering of three Block IIF satellites over the Earth](IIF_2-sm.jpg)
GPS Block IIF:
Follow-on satellite design
![Artist's rendering of GPS III satellite](GPS-III-A-sm.jpg)
GPS III (Increment A)