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Published October 31, 2018 | Version v1
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Models for the specification of ionospheric background

  • 1. National Observatory of Athens

Description

The reliable identification of Travelling Ionospheric Disturbances (TIDs) requires accurate determination of the background
conditions. The challenge lies in the fact that the TID effects on the ionospheric plasma properties should be cautiously distinguished from large scale space weather effects (i.e., ionospheric storm effects) that may be simultaneously evolved or may act as the triggering mechanism. The aim of this report is to propose the algorithms to be deployed in the TechTIDE warning system for the calculation of the ambient electron density and relevant key ionospheric characteristics (e.g. foF2 and hmF2). The ionospheric background will be used by the user of the TechTIDE system to evaluate the criticality of the prevailing conditions in conjunction to the results provided by the system on the identification of TIDs. The tools/methodologies/algorithms for the representation of the background conditions are described in Section 1, including algorithms for the monitoring of large and small scale effects, separately (Sections 1.1 and 1.2). In addition, our analysis demonstrated the need to address additional challenges for the effective implementation of the proposed algorithms. These challenges include data quality issues (i.e. occurrence of data outliers and data gaps) and the requirement to characterize properly the level of the ionospheric activity. In response to these needs, a set of auxiliary tools/algorithms are described in Section 2. 
 

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TechTIDE_D3.3.pdf

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