Amplitude variations in GPS signals as a possible indicator of ionospheric structures

J. Wickert; A. G. Pavelyev; Y. A. Liou; T. Schmidt; C. Reigber; K. Igarashi; A. A. Pavelyev; S. Matyugov

doi:10.1029/2004GL020607

Amplitude variations in GPS signals as a possible indicator of ionospheric structures

J. Wickert, A. G. Pavelyev, Y. A. Liou, T. Schmidt, C. Reigber, K. Igarashi, A. A. Pavelyev, S. Matyugov

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Abstract

The noisy and impulsive fluctuations in the CHAMP radio occultation (RO) amplitude data are similar to the C-type and S-type ionospheric amplitude scintillations formerly observed at 1.5 GHz in the mid-latitude region in satellite-to-Earth Inmarsat links. These amplitude scintillations can be associated with different types of ionospheric structures. S-type amplitude variations can be explained by the influence of inclined plasma layers in the ionosphere where the RO signal trajectory is perpendicular to the sharp plasma gradient. Simulation indicates the possibility to reveal the spatial distribution of the electron density in the inclined ionospheric layers from analysis of the S-type RO amplitude variations. The seasonal, geographical and temporal distributions of CHAMP RO events with high S₄ index values observed during the years 2001-2003 indicate their dependence on solar activity.

Original language	English
Pages (from-to)	1-4
Number of pages	4
Journal	Geophysical Research Letters
Volume	31
Issue number	24
DOIs	https://doi.org/10.1029/2004GL020607
State	Published - 28 Dec 2004

Keywords

0933 Exploration geophysics: Remote sensing
2435 Ionosphere: Ionospheric disturbances
6934 Radio science: Ionospheric propagation (2487)
6964 Radio science: Radio wave propagation
6979 Radio science: Space and satellite communication

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title = "Amplitude variations in GPS signals as a possible indicator of ionospheric structures",

abstract = "The noisy and impulsive fluctuations in the CHAMP radio occultation (RO) amplitude data are similar to the C-type and S-type ionospheric amplitude scintillations formerly observed at 1.5 GHz in the mid-latitude region in satellite-to-Earth Inmarsat links. These amplitude scintillations can be associated with different types of ionospheric structures. S-type amplitude variations can be explained by the influence of inclined plasma layers in the ionosphere where the RO signal trajectory is perpendicular to the sharp plasma gradient. Simulation indicates the possibility to reveal the spatial distribution of the electron density in the inclined ionospheric layers from analysis of the S-type RO amplitude variations. The seasonal, geographical and temporal distributions of CHAMP RO events with high S4 index values observed during the years 2001-2003 indicate their dependence on solar activity.",

keywords = "0933 Exploration geophysics: Remote sensing, 2435 Ionosphere: Ionospheric disturbances, 6934 Radio science: Ionospheric propagation (2487), 6964 Radio science: Radio wave propagation, 6979 Radio science: Space and satellite communication",

author = "J. Wickert and Pavelyev, {A. G.} and Liou, {Y. A.} and T. Schmidt and C. Reigber and K. Igarashi and Pavelyev, {A. A.} and S. Matyugov",

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doi = "10.1029/2004GL020607",

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volume = "31",

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T1 - Amplitude variations in GPS signals as a possible indicator of ionospheric structures

AU - Wickert, J.

AU - Pavelyev, A. G.

AU - Liou, Y. A.

AU - Schmidt, T.

AU - Reigber, C.

AU - Igarashi, K.

AU - Pavelyev, A. A.

AU - Matyugov, S.

PY - 2004/12/28

Y1 - 2004/12/28

N2 - The noisy and impulsive fluctuations in the CHAMP radio occultation (RO) amplitude data are similar to the C-type and S-type ionospheric amplitude scintillations formerly observed at 1.5 GHz in the mid-latitude region in satellite-to-Earth Inmarsat links. These amplitude scintillations can be associated with different types of ionospheric structures. S-type amplitude variations can be explained by the influence of inclined plasma layers in the ionosphere where the RO signal trajectory is perpendicular to the sharp plasma gradient. Simulation indicates the possibility to reveal the spatial distribution of the electron density in the inclined ionospheric layers from analysis of the S-type RO amplitude variations. The seasonal, geographical and temporal distributions of CHAMP RO events with high S4 index values observed during the years 2001-2003 indicate their dependence on solar activity.

AB - The noisy and impulsive fluctuations in the CHAMP radio occultation (RO) amplitude data are similar to the C-type and S-type ionospheric amplitude scintillations formerly observed at 1.5 GHz in the mid-latitude region in satellite-to-Earth Inmarsat links. These amplitude scintillations can be associated with different types of ionospheric structures. S-type amplitude variations can be explained by the influence of inclined plasma layers in the ionosphere where the RO signal trajectory is perpendicular to the sharp plasma gradient. Simulation indicates the possibility to reveal the spatial distribution of the electron density in the inclined ionospheric layers from analysis of the S-type RO amplitude variations. The seasonal, geographical and temporal distributions of CHAMP RO events with high S4 index values observed during the years 2001-2003 indicate their dependence on solar activity.

KW - 0933 Exploration geophysics: Remote sensing

KW - 2435 Ionosphere: Ionospheric disturbances

KW - 6934 Radio science: Ionospheric propagation (2487)

KW - 6964 Radio science: Radio wave propagation

KW - 6979 Radio science: Space and satellite communication

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U2 - 10.1029/2004GL020607

DO - 10.1029/2004GL020607

M3 - 期刊論文

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SN - 0094-8276

VL - 31

SP - 1

EP - 4

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 24

ER -

Amplitude variations in GPS signals as a possible indicator of ionospheric structures

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Keywords

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