R. Gray

In-flight detection of errors for enhanced aircraft flight safety and vertical accuracy improvement using digital terrain elevation data with an inertial navigation system, global positioning system and radar altimeter

R. Gray, Robert A Gray, 1999 .

A PERFORMANCE EVALUATION OF ELEVATION DATABASE INTEGRITY MONITORS FOR SYNTHETIC VISION SYSTEMS

S. Young, M. Haag, R. Gray, 2002 .

Terrain database integrity monitoring for synthetic vision systems

S.D. Young, J. Sayre, J. Campbell, 2005, IEEE Transactions on Aerospace and Electronic Systems.

Flight test results of a synthetic-vision elevation database integrity monitor

Maarten Uijt de Haag, Jacob Campbell, Steve D. Young, 2001, SPIE Defense + Commercial Sensing.