Correlation of Auroral Dynamics and GNSS Scintillation with an Autoencoder. (arXiv:1910.03085v1 [physics.space-ph])

Correlation of Auroral Dynamics and GNSS Scintillation with an Autoencoder. (arXiv:1910.03085v1 [physics.space-ph])
<a href="http://arxiv.org/find/physics/1/au:+Lamb_K/0/1/0/all/0/1">Kara Lamb</a>, <a href="http://arxiv.org/find/physics/1/au:+Malhotra_G/0/1/0/all/0/1">Garima Malhotra</a>, <a href="http://arxiv.org/find/physics/1/au:+Vlontzos_A/0/1/0/all/0/1">Athanasios Vlontzos</a>, <a href="http://arxiv.org/find/physics/1/au:+Wagstaff_E/0/1/0/all/0/1">Edward Wagstaff</a>, <a href="http://arxiv.org/find/physics/1/au:+Baydin_A/0/1/0/all/0/1">At&#x131;l&#x131;m G&#xfc;nes Baydin</a>, <a href="http://arxiv.org/find/physics/1/au:+Bhiwandiwalla_A/0/1/0/all/0/1">Anahita Bhiwandiwalla</a>, <a href="http://arxiv.org/find/physics/1/au:+Gal_Y/0/1/0/all/0/1">Yarin Gal</a>, <a href="http://arxiv.org/find/physics/1/au:+Kalaitzis_A/0/1/0/all/0/1">Alfredo Kalaitzis</a>, <a href="http://arxiv.org/find/physics/1/au:+Reina_A/0/1/0/all/0/1">Anthony Reina</a>, <a href="http://arxiv.org/find/physics/1/au:+Bhatt_A/0/1/0/all/0/1">Asti Bhatt</a>

High energy particles originating from solar activity travel along the the
Earth’s magnetic field and interact with the atmosphere around the higher
latitudes. These interactions often manifest as aurora in the form of visible
light in the Earth’s ionosphere. These interactions also result in
irregularities in the electron density, which cause disruptions in the
amplitude and phase of the radio signals from the Global Navigation Satellite
Systems (GNSS), known as ‘scintillation’. In this paper we use a multi-scale
residual autoencoder (Res-AE) to show the correlation between specific dynamic
structures of the aurora and the magnitude of the GNSS phase scintillations
($sigma_{phi}$). Auroral images are encoded in a lower dimensional feature
space using the Res-AE, which in turn are clustered with t-SNE and UMAP. Both
methods produce similar clusters, and specific clusters demonstrate greater
correlations with observed phase scintillations. Our results suggest that
specific dynamic structures of auroras are highly correlated with GNSS phase
scintillations.

High energy particles originating from solar activity travel along the the
Earth’s magnetic field and interact with the atmosphere around the higher
latitudes. These interactions often manifest as aurora in the form of visible
light in the Earth’s ionosphere. These interactions also result in
irregularities in the electron density, which cause disruptions in the
amplitude and phase of the radio signals from the Global Navigation Satellite
Systems (GNSS), known as ‘scintillation’. In this paper we use a multi-scale
residual autoencoder (Res-AE) to show the correlation between specific dynamic
structures of the aurora and the magnitude of the GNSS phase scintillations
($sigma_{phi}$). Auroral images are encoded in a lower dimensional feature
space using the Res-AE, which in turn are clustered with t-SNE and UMAP. Both
methods produce similar clusters, and specific clusters demonstrate greater
correlations with observed phase scintillations. Our results suggest that
specific dynamic structures of auroras are highly correlated with GNSS phase
scintillations.

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