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About Ionospheric Threats on GNSS Applications

Jakowski, Norbert and Mayer, Christoph and Borries, Claudia and Wilken, Volker (2010) About Ionospheric Threats on GNSS Applications. EGU General Assembly 2010, 03.-07. Mai 2010, Wien, Österreich.

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Ionospheric perturbations can adversely affect the performance of Global Navigation Satellite Systems (GNSS). This is due to the fact that extremes in plasma density, their rate of change and spatial distribution may cause unusually high range errors, phase and signal strength fluctuations of GNSS signals. Hence, performance parameters of GNSS systems such as accuracy, availability, continuity and integrity may strongly deviate from their average behaviour. In the presence of extreme ionospheric perturbations the limits of one of these quantities can be exceeded and thus the functionality of the GNSS system is threatened. Reported are selected ionospheric events such as moving ionization fronts and severe scintillation events whose characteristic features may threat specific GNSS applications. The events are analysed by using observational data computed in DLR Neustrelitz by using ground and space based measurements of the ionosphere since more than one solar cycle period. It has been found that large signal amplitude fluctuations my cause even loss of lock. Statistical studies are performed to quantify the ionospheric threat by computing the occurrence probability of severe events exceeding a certain threshold. In order to quantify the ionospheric perturbation degree and to reduce ionospheric threats by early warning, the use of ionospheric perturbation indices is discussed.

Item URL in elib:https://elib.dlr.de/64112/
Document Type:Conference or Workshop Item (Speech)
Title:About Ionospheric Threats on GNSS Applications
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Date:7 May 2010
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:GNSS, performance, ionosphere, threats
Event Title:EGU General Assembly 2010
Event Location:Wien, Österreich
Event Type:international Conference
Event Dates:03.-07. Mai 2010
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Ionosphärenerkundung (old)
Location: Neustrelitz
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Borries, Dr. Claudia
Deposited On:08 Jun 2010 11:40
Last Modified:14 Jan 2011 11:41

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