Lockheed Martin has submitted a proposal for the U.S. Air Force's GPS III Follow On (GPS IIIF) program.
The GPS IIIF program intends to produce up to 22 next-generation satellites. The Air Force's first 10 GPS III satellites are currently in full production at Lockheed Martin. GPS III will have three times better accuracy and up to eight times improved anti-jamming capabilities. Spacecraft life will extend to 15 years, 25 percent longer than the newest GPS satellites on-orbit today. GPS III's new L1C civil signal also will make it the first GPS satellite to be interoperable with other international global navigation satellite systems, like Galileo, the company said in a statement Tuesday.
Lockheed Martin's proposal for the GPS IIIF program adds further power, resiliency and capabilities to GPS III.
Lockheed Martin's GPS IIIF will feature a fully-digital navigation payload. The payload on the first 10 GPS III satellites is already 70 percent digital.
Each GPS IIIF satellite will include a laser retro-reflector array, which allows the positioning of on-orbit satellites to be refined with ground-based, laser precision. The precise positioning of each satellite ultimately enhances the positioning signals they generate.
Additionally, the U.S. government will provide each GPS IIIF with a new Search and Rescue payload. These hosted payloads, spread around the globe on GPS IIIF satellites, will help first responders to detect and respond to emergency signals.
"Our GPS IIIF solution is based off a design compatible with both the Air Force's next generation Operational Control System (OCX) and the existing GPS constellation," said Johnathon Caldwell, Program Manager for Lockheed Martin's Navigation Systems mission area.
Currently, the first 10 GPS III satellites are in full production at Lockheed Martin's GPS III Processing Facility, a $128 million cleanroom factory designed in a virtual reality environment to drive efficiency and reduce costs in satellite production.
In September 2017, the Air Force declared Lockheed Martin's first GPS III satellite "Available for Launch" (AFL). GPS III Space Vehicle 01 (GPS III SV01) is in storage waiting for the Air Force to call in up for launch.
GPS III SV02 completed rigorous Thermal Vacuum (TVAC) testing in December 2017, is currently in its final environmental testing, and is expected to be declared AFL in summer 2018. GPS III SV03 was fully integrated in fall 2017 and recently began TVAC, and SV04 was recently integrated in anticipation of environmental testing later this summer. GPS III SV05 has now received its navigation payload and is in final vehicle build up. GPS III SV06 has begun its initial build with GPS III SV07 also planned to begin production this spring.
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