3U OpenVPX embedded computing for assured position, navigation and timing (A-PNT) offered by Curtiss-Wright

Jan. 3, 2023
The VPX3-673A module has a low-noise chip-scale atomic clock (LN-CSAC), with intelligence provided by a Xilinx Multiprocessor System On Chip (MPSoC).

ASHBURN, Va. – The Curtiss-Wright Corp. Defense Solutions Division in Ashburn, Va., is introducing the VPX3-673A rugged 3U OpenVPX module for assured position, navigation and timing (A-PNT) with alternative navigation (ALTNAV) and the pntOS architecture.

The VPX3-673A is a rugged 3U OpenVPX form factor module compatible with the U.S. Army's Command, Control, Communications, Computers, Cyber, Intelligence, Surveillance, Reconnaissance (C5ISR)/Electronic Warfare Modular Open Suite of Standards (CMOSS) suite of standards and aligned to the Sensor Open Systems Architecture (SOSA) technical standard 1.0.

ALTNAV, a space-based commercial system, is being evaluated by the U.S. Army as an alternative and complementary source of PNT information on the battlefield.

As an open-source, government-owned plug-in architecture for building integrated PNT sensor-fusion applications, pntOS helps reduce the time and effort necessary to develop algorithms and add support for new sensors.

Related: Curtiss-Wright Unveils Assured Position, Navigation & Timing (A-PNT) Solutions for UK / European Ground Vehicles in GPS/GNSS Denied Environments

At the heart of the VPX3-673A embedded computing module is a low-noise chip-scale atomic clock (LN-CSAC), with intelligence provided by a Xilinx Multiprocessor System On Chip (MPSoC).

Complementing these devices is an ALTNAV receiver and a 10-degree-of-freedom inertial measurement unit (IMU). The board supports an internal GPS module for Selective Availability Anti-Spoofing Module (SASSM) and M-CODE, or an external GPS via a front panel connector.

The VPX3-673A communicates PNT information using standard Vehicle Integration for C4ISR/EW Interoperability (VICTORY) data messages in compliance with the CMOSS Mounted Form Factor (CMFF) architecture.

Designed to meet the SOSA radial clock profile SLT3x-TIM-2S1U22S1U2U1H-14.9.2-1, the VPX3-673A also acts as systemwide timing master by producing and distributing reliable, phase aligned, clock signals.

Related: CMOSS-compliant and SOSA-aligned embedded computing for ground combat vehicles introduced by Curtiss-Wright

The source is user-selectable from multiple options, including the LN-CSAC, GPS, ALTNAV, or external sources via the Ethernet backplane or coax connectors. Additionally, this module supports NTP/PTP protocol.

In compliance with the SOSA radial clock profile, the VPX3-673A can output 11 radial clocks on the backplane and one radial clock on the coax connector. If more clock channels are required, multiple VPX3-673A modules can be daisy-chained together.

For more information contact Curtiss-Wright Defense Solutions online at www.curtisswrightds.com.

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