Date of Award

Spring 1-1-2011

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Aerospace Engineering Sciences

First Advisor

Scott E. Palo

Second Advisor

Lynn Harvey

Third Advisor

Han-Li Liu

Abstract

A method to explicitly estimate the short term variability of the migrating diurnal tide on a global scale is presented and analyzed. The method employs a least squares approach on temperature data from two satellite instruments (EOS Aura-MLS and TIMED-SABER) to estimate the daily zonal mean, migrating diurnal amplitude and migrating diurnal phase on a daily basis. The main objective of the study is to analyze the feasibility and scientific validity of this method. Biases between the instruments, revealed through a comparative analysis, are removed to reduce potential error. Effects of other tides and waves are reduced by zonal averaging and sampling at different local times. Comparisons to theory and past observation indicate that the final estimates are sufficient for scientific analysis near the equatorial-mesosphere where the solar local time sampling is well-spaced and the amplitude of the migrating diurnal tide is large compared to the un-modeled effects.

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