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Microchip BlueSky GNSS Firewall


The Microchip's BlueSky GNSS Firewall solves the problem of protecting already deployed systems by providing a cost-effective overlay solution installed between existing GPS antennas and GPS systems. Similar to a network firewall, the BlueSky GNSS Firewall protects systems inside the firewall from untrusted sky-based signals outside the firewall. Contained within the BlueSky GNSS Firewall is a software engine that analyzes the GPS signal. GPS signal data is received and evaluated from each satellite to ensure compliance with GPS standards along with analyzing received signal characteristics. This information is used by the firewall to block anomalous GPS signals and provide a hardened GPS signal output to downstream GPS systems. The BlueSky GNSS Firewall also supports a range of atomic clock technologies enabling continuous operation where GPS may be completely denied for extended periods of time, even in cases where disruptions may last for more than 30 days. 


  • Identifies and protects GNSS systems from spoofing and jamming

  • Integrates seamlessly between existing GNSS antenna and GNSS system

  • Optional Rubidium Miniature Atomic Clock (MAC) can be installed inside unit

  • 1 PPS and 10 MHz timing reference inputs for extended holdover (for example, connection of external cesium reference)

  • Redundant AC or DC power options with power monitoring and load sharing

  • Local and remote Command Line Interface (CLI) in addition to secure and easy-to-use web interface

  • BlueSky GNSS Firewall embedded software is field upgradeable with new GNSS validation rules

  • Seamless integration with TimePictra provides end-to-end management of 10's, 100's or 1000's of units from a single server

  • BlueSky Performance Monitoring integrated into TimePictra provides GNSS reception measurement and visibility

  • Configurable GNSS Thresholds: Carrier-to-Noise, RF Power, Satellites-in-View, Position Deviation, Phase Time Deviation and more

  • New Trusted TimeTM Anomaly Detector for comparing Network Time and GNSS Time

  • New GPS Subframe Reference detection enabling the comparison of live-sky sub-frame data with sub-frame data received from a remote BlueSky GNSS Firewall

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