Title: COMMENTS ON "PERFORMANCE ANALYSIS OF A TIGHTLY COUPLED GPS/INERTIAL SYSTEM FOR TWO INTEGRITY MONITORING METHODS
Author(s): J. L. Farrell, Frank van Graas, and Robert K. Anoll
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 48, Number 2
Pages: 131 - 132
Cite this article: Farrell, J. L., van Graas, Frank, Anoll, Robert K., "COMMENTS ON "PERFORMANCE ANALYSIS OF A TIGHTLY COUPLED GPS/INERTIAL SYSTEM FOR TWO INTEGRITY MONITORING METHODS", NAVIGATION, Journal of The Institute of Navigation, Vol. 48, No. 2, Summer 2001, pp. 131-132.
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Abstract: The paper by Lee and O’Laughlin 1 presents an analysis of the coast capability of GPS/inertial navigation system (INS) systems after all updates have been withdrawn for extended periods. In the summary, coast durations of up to 30 min are claimed without violating a 0.3 nmi allowable error limit at 95 percent probability. We believe the industry has now been given an unwarranted sense of security, especially in view of very real jamming possibilities.