Accession Number:

AD0627722

Title:

THE METEOROLOGICAL PROBLEM OF ELECTRONIC MEASUREMENT OF DISTANCE,

Descriptive Note:

Corporate Author:

HOLMAN (JOHN F) CO INC WASHINGTON D C

Personal Author(s):

Report Date:

1966-02-01

Pagination or Media Count:

27.0

Abstract:

After a brief characterization of the presently employed electro-optical and electronic methods of measuring distance and the general conditions of propagation of their carrier waves in the atmosphere, the determination of the mean rate of propagation of the carrier waves is discussed. The latter is dependent on the possibility of determining the prevailing refraction coefficient which is a function of locus of the meteorological conditions along the wave path. The basic problem for light waves and microwaves lies in the possibility of determining the accurate mean temperature andor, for the decimeter and centimeter waves, also in the possibility of determining the mean vapor pressure. So far, the determination of the meteorological data has been made only at the termini of the respective distances and close to the ground. It is based on the assumption of a practically linear structure of the meteorological field for all elements in the area of measurement. The structure of the temperature by day and by night both close to the ground and in the free atmosphere and the additional influences due to motion of the air, topography and ground cover are discussed. Author

Subject Categories:

  • Atmospheric Physics
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE