The use of level singular value decomposition techniques for vector velocity determinations and its application to tid observations

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Title:	The use of level singular value decomposition techniques for vector velocity determinations and its application to tid observations
Authors:	Tsai,LC;Liu,JY;Berkey,FT;Stiles,GS
Contributors:	太空及遙測研究中心
Keywords:	DYNASONDE;REGION
Date:	1997
Issue Date:	2010-06-30 15:17:48 (UTC+8)
Publisher:	中央大學
Abstract:	Building on previous work related to a determination of dynasonde phase parameters, we have obtained <2 degrees standard deviation in the measured echo phases from an instrument at Bear Lake Observatory in Utah. These small uncertainties in phase measurement enable high-resolution echolocation components and line-of-sight Doppler velocity to be obtained. The purpose of this paper is to describe a level singular value decomposition technique to determine either the full vector velocity versus height or the plasma frequency in the ionosphere. Each three-dimensional velocity vector may be derived by a best fit to a set of echolocation components and Doppler velocities of spatially distributed echoes in independent steps over a frequency range of 0.2 MHz. Previous work has shown that ionospheric echoes in spread F can be used to derive a vector velocity that can be attributed to the flow of F-region plasma; in this work, data from the mid-latitude ionosphere are analyzed, which suggest that the three-dimensional phase motion of atmospheric gravity waves is responsible for the wave-like features that are observed. (C) 1997 COSPAR. Published by Elsevier Science Ltd.
Relation:	COUPLING AND ENERGETICS IN THE STRATOSPHERE-MESOSPHERE-THERMOSPHERE-IONOSPHERE SYSTEM
Appears in Collections:	[Center for Space and Remote Sensing Research ] journal & Dissertation

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