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.
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.
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.
Scale Model Ultrasonic Study of Arctic Ice
Final Technical Report
Scale Model Ultrasonic Study of Arctic Ice
Author: Walter C. Mayer
Publisher:
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).
Publisher:
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).
Technical Abstract Bulletin
Author: Defense Documentation Center (U.S.)
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 784
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 784
Book Description
Scientific and Technical Aerospace Reports
STAR
Arctic Bulletin
Author:
Publisher:
ISBN:
Category : Arctic regions
Languages : en
Pages : 848
Book Description
One issue each year devoted to the annual report.
Publisher:
ISBN:
Category : Arctic regions
Languages : en
Pages : 848
Book Description
One issue each year devoted to the annual report.
New Accessions List
Author: World Data Center A for Glaciology
Publisher:
ISBN:
Category : Glaciology
Languages : en
Pages : 112
Book Description
Publisher:
ISBN:
Category : Glaciology
Languages : en
Pages : 112
Book Description
Government Reports Annual Index
Author:
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 882
Book Description
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 882
Book Description