Satellite network constellation rendering. Photo: Sierra Space

Sierra Space successfully demonstrated its Resilient GPS (R-GPS) technology, with General Dynamics Mission Systems, for the U.S. Space Force, Sierra Space announced on March 31.

The demonstration generated GPS navigation signals required for the R-GPS mission, addressing threats like jamming and spoofing that challenge GPS infrastructure. The demonstration focused on the satellite’s hardware, firmware, and software that generates ‘YMCA’ waveforms, including P(Y), M-code, and C/A signals at L1 and L2 frequencies. 

The demonstration was part of the USSF’s Quick Start program to develop smaller, cost-effective satellites for rapid deployment. The program aims to integrate a layer of smaller satellites into the existing GPS framework to counter threats. In September 2024, Sierra Space, Astranis, Axient, and L3Harris Technologies received contracts from USSF Space Systems Command to design concepts for these satellites. Sierra Space passed an internal systems requirements review in 2024.

Vice President of Sierra Space Defense, Erik Daehler, commented: “This milestone not only underscores our commitment to advancing GPS technology, but positions Sierra Space to be optioned for Phase One, the next step of the U.S. Space Force’s Quick Start program.”