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Donald McKelvy
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Published on Sep 25, 2012 by LockheedMartinVideos

To replace and improve the current GPS satellites, Lockheed Martin and the U.S. Air Force are developing the next generation satellite system, known as GPS III. The new satellites will deliver improved accuracy, better signal strength, a new civil signal that will work with international global navigation satellite systems and much more. Learn more about the project at www.lockheedmartin.com/gps
http://www.youtube.com/watch?v=8TMZSMtPhGI&feature=share&list=UUJWcF0ex7_doPdIQGbVpDsQ
 
Signal Sentry 1000 is a Harris product to detect GPS jamming around fixed facilities. It's not part of the GPS satellite constellation.

 
The FCC appears to be in increasingly hot water:
 


 

While the HASC version of the NDAA mostly gives the Space Force what it asked for, it does call out the GPS III Follow-On program for “unjustified cost growth” in the space segment and cuts $15 million from the service’s $627.8 million procurement request; along with another $10 million from the R&D request of $263.5 million. Prime contractor Lockheed Martin is building 10 GPS III satellites, and 22 GPS III Follow-On satellites that will sport improved encryption among other upgrades. The Space Force is planning to launch the third GPS III satellite on June 30.

The draft also would cut $5 million from the long-troubled GPS III Operational Control Segment (OCX), being developed by Raytheon — again citing unjustified cost growth.
 
On a related note:
 

Why do I have visions of endless criminal investigations and civil lawsuits down the line?
 
Two weeks later a Russian news media personality bragged that Russia could bring down all 32 GPS satellites
GPS satellites are at an altitude of 20,200km, that would be extremely costly since a custom rocket system would have to be built. There are no regular in-service SAMs that can reach that high.
 
 
IIRC, Dallas / Ft. Worth has had a 30+ hr GPS outage that sent the airport back to non-GPS systems.

AFAIR, as yet, no apparent cause...

 

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