Author: Walter G. MayerPublisher:
ISBN:
Category : Ice
Languages : en
Pages : 12
Book Description
Scale Model Ultrasonic Study of Arctic Ice
Author: Walter G. MayerFinal Technical Report
Author: Walter G. MayerScale Model Ultrasonic Study of Arctic Ice
Author: Walter C. MayerPublisher:
ISBN:
Category :
Languages : en
Pages : 14
Book Description
Backscattering of ultrasonic signals from solid plates and solids are interpreted to yield information about the flexural modes of the plate and the sonic velocities in sea ice as well as the fractional ice content of the water-sea ice layer. (Author).
Scale Model Ultrasonic Study of Arctic Ice. Part 2
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 64
Book Description
The work describes the mathematical background and the physical principles which were used to perform calculations of sonic reflectivity from the water side of a water-ice-air layered system where the angle of incidence is varied to produce changes of the magnitude and the phase of the incident sonic beam as it is reflected from the ice. It is shown that evaluation of these changes in reflectivity can be used to determine the thickness of the ice without having to be in direct mechanical contact with the ice. The computation of modulus and phase of the reflected beam is accomplished via a modified Simplex Computation Method. The basic concepts of the method are described, as are the modifications incorporated to make the program useful for calculations of ice thicknesses which one would ordinarily expect to encounter in the Artic Ocean. The report contains the description of a computer program to calculate the mode structure of an ice plate floating on water. Reflectivity of sonic signals which set up the modes is used to determine the thickness of the reflecting ice plate.
Arctic Bulletin
Author: Publisher:
ISBN:
Category : Arctic regions
Languages : en
Pages : 332
Book Description
One issue each year devoted to the annual report.
Author: 
Author: 
Author: 
Author: Albert Rango
Author: