Title page for ETD etd-110498-120720

Type of Document Master's Thesis
Author Sorensen, Ira Joseph
Author's Email Address iras@vt.edu
URN etd-110498-120720
Title Analytical and Experimental Characterization of a Linear-Array Thermopile Scanning Radiometer for Geo-Synchronous Earth Radiation Budget Applications
Degree Master of Science
Department Mechanical Engineering
Advisory Committee
Advisor Name Title
Mahan, James Robert Committee Chair
Priestley, Kory J. Committee Member
Vick, Brian L. Committee Member
  • Earth radiation budget
  • thermopile radiation detectors
  • radiometry
Date of Defense 1998-11-30
Availability unrestricted
The Thermal Radiation Group, a laboratory in the department

of Mechanical Engineering at Virginia Polytechnic Institute and

State University, is currently working towards the development of

a new technology for cavity-based radiometers. The radiometer

consists of a 256-element linear-array thermopile detector

mounted on the wall of a mirrored wedge-shaped cavity.

The objective of this research is to provide analytical and

experimental characterization of the proposed radiometer. A

dynamic end-to-end opto-electrothermal model is developed to

simulate the performance of the radiometer. Experimental results

for prototype thermopile detectors are included. Also

presented is the concept of the discrete Green's function to

characterize the optical scattering of radiant energy in the

cavity, along with a data-processing algorithm to correct for the

scattering. Finally, a parametric study of the sensitivity of the discrete

Green's function to uncertainties in the surface properties of the

cavity is presented.

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