Can spaceborne synthetic aperture radar be useful for the mapping of ionospheric disturbances in the Arctic Region?

http://doi.org/10.35595/2414-9179-2019-1-25-290-297

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About the Authors

Giovanni Nico,

Consiglio Nazionale delle Ricerche, Istituto per le Applicazioni del Calcolo,
Via Amendola, 122/O, 75100, Bari, Italy,
E-mail: g.nico@ba.iac.cnr.it

Saint Petersburg State University,
10th line V.O., 33, 199178, Saint Peterburg, Russia,
E-mail: giovanni.nico@spbu.ru

Aleksandra Nina

Institute of Physics, University of Belgrade,
Pregrevica 118, 11080 Belgrade, Serbia,
E-mail: sandrast@ipb.ac.rs

Milan Radovanović

Geographical Institute Jovan Cvijić SASA,
11000 Belgrade, Serbia,
E-mail: m.radovanovic@gi.sanu.ac.rs

South Ural State University, Institute of Sports, Tourism and Service,
454080 Chelyabinsk, Russia,
E-mail: milan.geograf@gmail.com

Abstract

In this work we study the potential of C-band SAR images to map ionosphere disturbances in the Arctic region. This region is a unique region for ionosphere studies due to the characteristics of the geomagnetic field. In particular, we focus on the SAR interferometry technique as means to measure the temporal variation of propagation delay in correspondence of ionosphere disturbances. This technique provides maps of propagation delay differences between the acquisition dates of the two coherent SAR images needed to estimate the propagation delay over the study area. The high spatial resolution of C-band SAR images, in the order of 25 meters could contribute to the study of spatial distribution of ionosphere disturbances. Digisondes, VLF/ELF receivers and the EISCAT radars in the available in the Arctic region provide the time of ionosphere disturbances due to the solar activity, monitored by the ACE satellite. This allows to select the SAR images to process to map the ionosphere disturbances. The typical spatial coverage and acquisition times of Sentinel-1 images over the Arctic region are reported. A numerical analysis is carried out to estimate the expected ionosphere propagation delay in Sentinel-1 interferograms and so the potential of SAR interferometry to map the effects of ionosphere disturbances.

Keywords

Synthetic Aperture Radar (SAR), SAR interferometry, Ionosphere, Propagation delay, Total Electron Content (TEC), Arctic.

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For citation: Nico G., Nina A., Radovanović M. Can spaceborne synthetic aperture radar be useful for the mapping of ionospheric disturbances in the Arctic Region? InterCarto. InterGIS. GI support of sustainable development of territories: Proceedings of the International conference. Moscow: Moscow University Press, 2019. V. 25. Part 1. P. 290–297. DOI: 10.35595/2414-9179-2019-1-25-290-297