Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1981-05-07
1984-11-06
Wilbur, Maynard R.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 5W, 374117, 73170R, 367 87, G01J 900
Patent
active
044815174
ABSTRACT:
Devices and methods are disclosed for remote measurment of temperature (and velocity) profiles in a fluid medium (i.e., the atmosphere and/or oceans). Each device, herein called an echometer, and method are capable of providing remote measurements of temperature through the use of propagated waves (i.e., acoustic or electromagnetic waves) and interferometric principles. By use of Doppler processing, simultaneous measurement can be made of three-dimensional velocities at the same points in space to enable remote measurement of heat fluxes in the atmosphere or ocean. The waves to be propagated are formed and then transmitted from a transmitting array to form a pattern of constructive interference fringes and reflected (or scattered) waves are received from predetermined points in the constructive interference fringes at a receiver where an analog signal indicative of the reflected waves is formed and the mean phase thereof sampled to form a digital signal that is processed to determine therefrom temperature changes or absolute temperature measurements at predetermined points spaced from the transmitting array and receiver.
REFERENCES:
patent: 3885237 (1975-05-01), Kirkpatrick
patent: 4053886 (1977-10-01), Wright et al.
patent: 4222265 (1980-09-01), Ravussin
patent: 4249418 (1981-02-01), Ebata
"Echosonde Interferometer for Atmospheric Research" Brown, Little and Wri, Journal of the Acoustical Society of America, vol. 63, No. 3, Mar. 1978, pp. 694-699.
"Advances in Atmospheric Acoustics", Brown and Hall, Reviews of Geophysics and Space Physics, vol. 16, No. 1, Feb. 1978 pp. 47-110.
"Ronsard Meteorological Radar", M. Castets, Electrical Communications, vol. 52, No. 2 (1977), pp. 146-151.
A. D. Surridge, "On a Phase Sensative Acoustic Sounder," Journal of Atmospheric and Terrestrial Physics, vol. 40, pp. 105-110, (1978).
A. D. Surridge, "Temperature Profile in the Lower Atmosphere obtained by Acoustic Sounding", paper presented at 1974 Nelcon Conference at Auckland, New Zealand, Aug. 1974.
Closs & Surridge, "The Temperature Profile in the Lower Atmosphere", Journal of Physics E: Scientific Instruments, vol. 7 (1974).
Englert Alvin J.
Harris Robert E.
Kaiser K. R.
Pawlikowski Eugene J.
The United States of America as represented by the Secretary of
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