Airborne microwave refractometer

Details Airborne microwave refractometer Airborne microwave refractometer

1976-07-22

1977-05-31

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 2704

Patent

active

040272370

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.

REFERENCES:
patent: 2637767 (1953-05-01), Hershberger
patent: 3356941 (1967-12-01), Everman
patent: 3482161 (1969-12-01), Poulter
patent: 3601695 (1971-08-01), Heile

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