Accession Number : AD0736549

Title :   A Geometrical Basis for Direct Ranging in Hyperbolic Navigation Systems,

Corporate Author : AIR FORCE SYSTEMS COMMAND WASHINGTON DC DIRECTOR OF LABS

Personal Author(s) : Ryerson, Joseph L.

Report Date : DEC 1968

Pagination or Media Count : 14

Abstract : The geometry of hyperbolic navigation systems causes errors in time measurements to produce ambiguities in the location of navigation fixes. As these ambiguities tend to vanish as apparent positions approach the correct position, the differences in the ambiguous fix points are potentially useful as observation variables for the purpose of improving the estimated location of the correct fix. These fixes may be absolute geographical positions or repeatable positions based upon apparent ranges. (Author)

Descriptors :   *HYPERBOLIC NAVIGATION, *RANGE FINDING, GEOMETRY, POSITION FINDING, ERRORS, TIME.

Subject Categories : Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE