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Assessment of Global Ionospheric Maps Performance by Means of Ionosonde Data

Jerez, Gabriel and Hernandez-Pajares, Manuel and Prol, Fabricio and Alves, Daniele and Monico, João (2020) Assessment of Global Ionospheric Maps Performance by Means of Ionosonde Data. Remote Sensing, 12 (20), p. 3452. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/rs12203452. ISSN 2072-4292.

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Official URL: https://www.mdpi.com/2072-4292/12/20/3452


This work presents a new method for assessing global ionospheric maps (GIM) using ionosonde data. The method is based on the critical frequency at the F2 layer directly measured by ionosondes to validate VTEC (vertical total electron content) values from GIMs. The analysis considered four different approaches to using foF2. The study was performed over one of the most challenging scenarios, the Brazilian region, considering four ionosondes (combined in six pairs) and thirteen GIM products available at CDDIS (Crustal Dynamics Data Information System). Analysis was conducted using daily, weekly, one year (2015), and four years (2014–2017) of data. Additional information from the ionosphere was estimated to complement the daily analysis, such as slab thickness and shape function peak. Results indicated that slab thickness and shape function peak could be used as alternative indicators of periods and regions where this method could be applied. The weekly analysis indicated the squared frequency ratio with local time correction as the best approach of using foF2, between the ones evaluated. The analysis of one-year data (2015) was performed considering thirteen GIMs, where CODG and UQRG were the two GIMs that presented the best performance. The four-year time series (2014–2017) were analyzed considering these two products. Regional and temporal ionospheric influences could be noticed in the results, with expected larger errors during the solar cycle peak in 2014 and at locations with pairs of ionosondes with the larger distance apart. Therefore, we have confirmed the viability of the developed approach as an assessment method to analyze GIMs quality based on ionosonde data.

Item URL in elib:https://elib.dlr.de/139430/
Document Type:Article
Title:Assessment of Global Ionospheric Maps Performance by Means of Ionosonde Data
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Jerez, GabrielSao Paulo State University (UNESP)https://orcid.org/0000-0001-6893-2144UNSPECIFIED
Hernandez-Pajares, ManuelUPC BarcelonaUNSPECIFIEDUNSPECIFIED
Prol, FabricioGerman Aerospace Center (DLR)https://orcid.org/0000-0002-7206-1705UNSPECIFIED
Alves, DanieleSao Paulo State University (UNESP)UNSPECIFIEDUNSPECIFIED
Monico, JoãoSao Paulo State University (UNESP)UNSPECIFIEDUNSPECIFIED
Date:21 October 2020
Journal or Publication Title:Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:p. 3452
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Keywords:ionosphere, global ionospheric maps, ionosonde, equatorial region
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Space Weather Effects EO (old), R - Vorhaben Ionosphäre (old)
Location: Neustrelitz
Institutes and Institutions:Institute for Solar-Terrestrial Physics > Space Weather Observation
Deposited By: Dos Santos Prol, Fabricio
Deposited On:05 Jan 2021 11:57
Last Modified:05 Jan 2021 11:57

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