C. Borries

Publications49
h-index8
Citations305
Highly Influential Citations13
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Accelerated projected steepest descent method for nonlinear inverse problems with sparsity constraints
This paper is concerned with the construction of an iterative algorithm to solve nonlinear inverse problems with an l1 constraint on x. One extensively studied method to obtain a solution of such an… Expand
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Empirical forecast of quiet time ionospheric Total Electron Content maps over Europe
Abstract An accurate forecast of the atmospheric Total Electron Content (TEC) is helpful to investigate space weather influences on the ionosphere and technical applications like satellite-receiver… Expand
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Introducing a disturbance ionosphere index
TLDR
We propose a disturbance ionosphere index that describes the perturbation degree of the ionosphere in a less specific form as a proxy. Expand
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Ionospheric storms—A challenge for empirical forecast of the total electron content
Since the last decades, the functioning of society depends more and more on well-functioning communication and navigation systems. As the availability and reliability of most of these satellite-based… Expand
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Ionospheric response over Europe during the solar eclipse of March 20, 2015
The solar eclipse on March 20, 2015 was a fascinating event for people in Northern Europe. From a scientific point of view, the solar eclipse can be considered as an in situ experiment on the Earth’s… Expand
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On the dynamics of Large-Scale Travelling Ionospheric Disturbances over Europe on 20th November 2003†
Ionospheric disturbances, often associated with geomagnetic storms, may cause threats to radio systems used for communication and navigation. One example is the super storm on 20th November 2003,… Expand
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Ionospheric Response to the X9.3 Flare on 6 September 2017 and Its Implication for Navigation Services Over Europe
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Extreme ionospheric conditions over Europe observed during the last solar cycle
The extreme variability of the ionosphere poses a threat to GNSS applications, since the signals of Global Navigation Satellite Systems (GNSS) are influenced by the ionospheric plasma. In this paper… Expand
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Early Warning of ionospheric disturbances for GNSS users
Temporal and spatial gradients in the ionosphere can cause major threats on communication and navigation satellite systems, because the propagation of transionospheric radio signals is influenced by… Expand
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Forecast of Total Electron Content over Europe for disturbed ionospheric Conditions
A general picture of the occurrence of ionospheric storms as function of local time, season and location is known from numerous studies over the past 50 years. Nevertheless, it is not yet possible… Expand
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