SDA’s Navigation Layer will provide alternate positioning, navigation, and timing (PNT) for potential Global Positioning System (GPS)-denied environments.

The SDA Navigation layer will allow for alternate Positioning, Navigation, and Timing (PNT) capabilities for GPS-denied environments supporting both determining predicted orbit and clock offsets, and provisions for transmitting a navigation waveform to DoD and other tactical users.

SDA’s Navigation Layer is exploring technical areas including, but not limited to:

  • Satellite-to-satellite/ground ranging via optical crosslinks and orbit and timing prediction applications,
  • Candidate navigation signals (waveforms) and frequency bands with included concepts of operations designed to maximize performance, availability, and integrity,
  • Cryptographic systems to protect PNT integrity, confidentiality, and/or availability,
  • Low size, weight, power, and cost (SWaP-C) atomic clocks or other timekeeping systems, and
  • Other hardware or software to support alternate PNT.