Viasat, Inc.

Other

Sandel Avionics Inc.

Albert J Bourdon

Gerald J Block

Gary G Christensen

John R Owens

Sean K O'Keeffe

Michael J Godfrey

A task matching circuit for synchronizing software on a plurality of processors is disclosed. The task matching circuit includes first and second inputs, an analysis sub-circuit, and an output. The first input is from a first processor configured to receive a first software routine identifier. The second input is from a second processor configured to receive a second software routine identifier. The analysis sub-circuit determines if the first software routine identifier corresponds with the second software routine identifier. The output is coupled to at least one of the first or second processors and indicates when the first and second software routine identifiers do not correspond. One of the first and second processors is delayed until the first and second software routine identifiers correspond.

System for selectively synchronizing high-assurance software tasks on multiple processors at a software routine level

A high-assurance system for processing information is disclosed. The high-assurance system comprising first and second processors, a task matching circuit, and first and second outputs. The task matching circuit configured to determine a software routine is ready for execution on the first processor, and delay the first processor until the second processor is ready to execute the software routine. The first output of the first processor configured to produce a first result with the software routine. The second output of the second processor configured to produce a second result with the software routine, where the first result is identical to the second result.

Synchronized high-assurance circuits

A system for reducing nuisance alerts and warnings in a terrain awareness and warning system for an aircraft, including determining if the aircraft is within a predetermined geometric volume surrounding an airport. If the aircraft is within the geometric volume, then determining the aircraft's current projected flight path for a selected distance or time and comparing it with at least one approach volume extending from a runway at the airport towards an outer boundary of the geometric volume. If the aircraft's current projected flight path is such that the aircraft is expected to be within the approach volume and stay within the approach volume to the runway, then inhibiting selected alerts and warnings associated with non-threatening terrain.

Method and apparatus for reducing false taws warnings and navigating landing approaches

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Solana Beach, CA, United States of America

Albert J Bourdon