Dynamic simulation of solar calibration of the total, Earth- viewing channel of the Earth Radiation Budget Experiment (ERBE)

The Earth Radiation Budget Experiment (ERBE) is an operational system of radiometric instruments placed in Earth orbit by the National Aeronautics and Space Administration (NASA). Its purpose is to monitor those components of the Earth radiation budget which influence the weather and climate. The active cavity radiometer (ACR) instruments on board the ERBE satellites are periodically calibrated against internal standards and against the relatively well-known solar constant. In order to better understand the dynamic behavior of the instruments, a high resolution dynamic model has been developed and used to simulate the solar calibration. The instrument dynamic model consists of two elements: a radiation distribution factor model and a finite element model of the heat conduction process. The distribution factors, which lie at the heart of the simulation, distribute the thermal radiation incident to the instrument aperture over the diffuse-specular active cavity surface. The results of the model for a transient analysis during solar calibration are compared with two sets of operational data provided by NASA. Very acceptable agreement is found between the model results and the operational data.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Mechanical Engineering

Department dc:contributor.department

Mechanical Engineering

Grantor dc:publisher

Virginia Polytechnic Institute and State University

Year dc:date.issued

1987

Author dc:creator

• Tira, Nour E.

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

en_US

Handle dc:identifier.uri

http://hdl.handle.net/10919/80176

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/80176