Title: Airborne microwave refractometer

Abstract: An airborne absolute microwave refractometer for obtaining an instantaneous nd continuous index of refraction of the atmosphere through which an aircraft bearing the refractometer is flying. A sampling cavity is mounted on an aircraft and is open to the outside atmosphere. A harmonic of a low frequency sweep oscillator is phase locked to the microwave sampling cavity and measurement of the average oscillator frequency by a binary counter arrangement provides a direct measurement of refractivity.

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Inventors: Heile, William A. (Indianapolis, IN, US)

Application Number: 707904
Filing Date: 1976-07-22
Publication_date: 1977-05-31
Assignee: The United States of America as represented by the Secretary of the Navy (Washington, DC)
Primary Class(es): 324/636
Other Classes:
US Patent Ref:

2637767	May, 1953	Hershberger	324/58.
3356941	Dec, 1967	Everman	324/58.
3482161	Dec, 1969	Poulter	324/58.
3601695	Aug, 1971	Heile	324/58.

Other Refs:
Primary Examiner: Krawczewicz, Stanley T.
Assistant Examiner:
Attorney: Sciascia; R. S., Collignon; Paul S.