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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

valuation of Different Methods for Calculating the ROTI Index Over the Brazilian Secto

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Author(s):
Carmo, C. S. [1] ; Denardini, C. M. [1] ; Figueiredo, C. A. O. B. [1] ; Resende, L. C. A. [1, 2] ; Picanco, G. A. S. [1] ; Neto, P. F. Barbosa [1, 3] ; Nogueira, P. A. B. [4] ; Moro, J. [2, 5] ; Chen, S. S. [1]
Total Authors: 9
Affiliation:
[1] Natl Inst Space Res INPE, Sao Jose Dos Campos - Brazil
[2] State Key Lab Space Weather NSSC CAS, Beijing - Peoples R China
[3] Salesian Univ Ctr Sao Paulo, Lorena - Brazil
[4] Fed Inst Educ Sci & Technol Sao Paulo IFSP, Jacarei - Brazil
[5] Southern Space Coordinat COESU INPE, Santa Maria, RS - Brazil
Total Affiliations: 5
Document type: Journal article
Source: RADIO SCIENCE; v. 56, n. 8 AUG 2021.
Web of Science Citations: 1
Abstract

Ionospheric irregularities as plasma bubbles occur in the ionosphere, and generally, they are characterized by the low plasma density regions. The Rate Of TEC Index (ROTI) was defined in terms of the Total Electron Content (TEC) variation and is used to characterize these plasma bubbles. It is essential to evaluate the ROTI behavior since the ionospheric irregularities can cause fluctuations in the radio signal, interfering in the ionospheric data analysis. Therefore, we performed in this work a comparative study of five different methods available to calculate the ROTI to evaluate the most suitable over the Brazilian region. The ROTI was calculated over three GNSS stations at different latitudes: Sao Luis (SALU, 2 degrees 31 ` S, 44 degrees 16 ` W; dip: -3.8 degrees), Cachoeira Paulista (CHPI, 22 degrees 40'S, 44 degrees 59'W; dip: -36.4 degrees), and Santa Maria (SMAR, 29 degrees 41 ` S, 53 degrees 48 ` W, dip: -37 degrees). The results show that the most viable method for calculating ROTI in the Brazilian region is based on the Slant TEC equation as defined by Cherniak et al. (2018), . Our results are supported by the comparison between the ROTI with TEC maps, ionograms collected at Fortaleza (FZA0M, 3 degrees 43'S, 38 degrees 32'W, dip: -15.8 degrees), SALU, and CHPI and All-Sky imagers collected at the Sao Joao do Cariri (SJCA, 7 degrees 23'S, 36 degrees 31'W, dip: -11 degrees) and CHPI. Additionally, we observe Equatorial Plasma Bubbles (EPBs) in the Brazilian region using the ROTI index map. (AU)

FAPESP's process: 18/09066-8 - TRAVELLING IONOSPHERIC DISTURBANCES OBSERVED BY DETRENDED TOTAL ELECTRON CONTENT MAPS/KEOGRAM OVER ANDES MOUNTAINS
Grantee:Cosme Alexandre Oliveira Barros Figueiredo
Support Opportunities: Scholarships in Brazil - Post-Doctoral