Title: Radio navigation with separate correlated scans to avoid reflection interference

Abstract: Where a signal reflective fixed obstruction is present in a subsector of a navigation angle sector in which guidance is required, scanning beams are employed including a main scan which is scanned over most of the navigation angle sector and an auxiliary scan which is scanned only over the obstruction subsector. The scan signals are received and correlated by the aircraft to distinguish obstruction subsector signals to thereby avoid reflection interference.

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Inventors: Toman, Donald J. (Pleasantville, NY, US)

Application Number: 668696
Filing Date: 1976-03-19
Publication_date: 1977-08-09
Assignee: Tull Aviation Corporation (Armonk, NY)
Primary Class(es): 342/408 342/373
Other Classes:
US Patent Ref:

2112283	Mar, 1938	Fritz	343/106.
3757337	Sep, 1973	Litchford	343/106.

Other Refs:
Primary Examiner: Wilbur, Maynard R.
Assistant Examiner: Berger, Richard E.
Attorney: Ailes; Curtis