System and method for aircraft altitude measurement using...

Communications: directive radio wave systems and devices (e.g. – Determining distance – Altimeter

Reexamination Certificate

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C342S033000, C342S118000, C342S175000, C342S195000, C340S945000, C340S947000, C340S951000, C340S952000, C701S001000, C701S003000, C701S004000

Reexamination Certificate

active

08077078

ABSTRACT:
A method of and system for determining the altitude of an aircraft can use a relative altitude estimate using information from an onboard radar. The altitude can be referenced to a runway for landing operations. The radar can produce relative altitude information from the range to the landing point and a precision estimation of the vertical angle to the landing point. The vertical angle estimate can be made with a phase processing antenna/radar system.

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