THE PHASE RELATIONSHIP BETWEEN ULF GEOMAGNETIC-PULSATIONS AND HF DOPPLER FREQUENCY-SHIFT OSCILLATIONS ON MARCH 24, 1991

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Title:	THE PHASE RELATIONSHIP BETWEEN ULF GEOMAGNETIC-PULSATIONS AND HF DOPPLER FREQUENCY-SHIFT OSCILLATIONS ON MARCH 24, 1991
Authors:	LIU,JY;HUANG,YN;BERKEY,FT
Contributors:	太空及遙測研究中心
Keywords:	MID-LATITUDES;MODEL
Date:	1993
Issue Date:	2010-06-29 18:52:37 (UTC+8)
Publisher:	中央大學
Abstract:	Previous theoretical models showed that, in the middle geomagnetic latitudes the oscillations in the Doppler frequency shift lag and lead the H component of ULF pulsations field on the ground, owing to the advection and compression mechanisms by 90-degrees, respectively. On March 24, 1991, measurements obtained from a CW-HF Doppler sounding system and a fluxgate magnetometer show phase differences of 15-degrees-77-degrees between the Doppler frequency shift oscillations and the H component of ULF pulsations field at ground level, which indicates that the Doppler velocity arises from predominant changes due to the compression mechanism.
Relation:	JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY
Appears in Collections:	[Center for Space and Remote Sensing Research ] journal & Dissertation

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