Approaches in Calculations of Drift Velocity of the F Region

Ou, Ying

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https://hdl.handle.net/2142/55484 Copy

Description

Title

Approaches in Calculations of Drift Velocity of the F Region

Author(s)

Ou, Ying

Contributor(s)

Kudeki, Erhan

Issue Date

2014-05

Keyword(s)

• radar imaging
• remote sensing

Abstract

This paper provides methods that could be applied to obtain drift velocity models for coherent scatter F region plasma. The drift velocity of the plasma is obtained from the autocorrelation function (ACF) between adjacent voltage data. The velocity was obtained from the slope of the phase of the ACF, which is obtained by un-weighted linear least squares fitting; however, the result suffered from the correlation between neighboring data. The second method obtained the phase velocity based on the linear relationship between the real and imaginary parts of the ACF. The phase velocity can also be obtained by inspecting the spectrum of the ACF of the voltage data, where the drift velocity can be calculated based on the amount of shift of the spectrum from the center. Nevertheless, the spectrum is distorted due to the way ACF is generated, and therefore this method was not applied. Velocity maps, showing the drift velocities with corresponding altitudes and geographical locations are constructed based on the two methods mentioned above for multiple scans.

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/55484

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