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3 referências similares encontradas (inclusive a original) buscando em 20 dentre 20 Arquivos.
Data e hora local de busca: 30/06/2025 21:03.
1. Identificação
Tipo de ReferênciaArtigo em Revista Científica (Journal Article)
Sitemtc-m21c.sid.inpe.br
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identificador8JMKD3MGP3W34R/3UAR3D8
Repositóriosid.inpe.br/mtc-m21c/2019/10.30.10.49   (acesso restrito)
Última Atualização2019:10.30.10.49.21 (UTC) simone
Repositório de Metadadossid.inpe.br/mtc-m21c/2019/10.30.10.49.21
Última Atualização dos Metadados2020:02.10.16.58.46 (UTC) simone
DOI10.1016/j.asr.2019.09.005
ISSN0273-1177
1879-1948
Chave de CitaçãoKlippPSFCPAHKBJFBSW:2019:EvIoMo
TítuloEvaluation of ionospheric models for Central and South Americas
Ano2019
MêsNov.
Data de Acesso30 jun. 2025
Tipo de Trabalhojournal article
Tipo SecundárioPRE PI
Número de Arquivos1
Tamanho4519 KiB
2. Contextualização
Autor 1 Klipp, Telmo dos Santos
 2 Petry, Adriano
 3 Souza, Jonas Rodrigues de
 4 Falcão, Gabriel Sandim
 5 Campos Velho, Haroldo Fraga de
 6 Paula, Eurico Rodrigues de
 7 Antreich, Felix
 8 Hoque, Mainul
 9 Kriegel, Martin
10 Berdermann, Jens
11 Jakowski, Norbert
12 Fernandez Gomez, Isabel
13 Borries, Claudia
14 Sato, Hiroatsu
15 Wilken, Volker
Identificador de Curriculo 1
 2
 3 8JMKD3MGP5W/3C9JHFE
 4
 5 8JMKD3MGP5W/3C9JHC3
 6 8JMKD3MGP5W/3C9JH2U
Grupo 1 CRCRS-COCRE-INPE-MCTIC-GOV-BR
 2 CRCRS-COCRE-INPE-MCTIC-GOV-BR
 3 DIDAE-CGCEA-INPE-MCTIC-GOV-BR
 4 CRCRS-COCRE-INPE-MCTIC-GOV-BR
 5 LABAC-COCTE-INPE-MCTIC-GOV-BR
 6 DIDAE-CGCEA-INPE-MCTIC-GOV-BR
Afiliação 1 Instituto Nacional de Pesquisas Espaciais (INPE)
 2 Instituto Nacional de Pesquisas Espaciais (INPE)
 3 Instituto Nacional de Pesquisas Espaciais (INPE)
 4 Instituto Nacional de Pesquisas Espaciais (INPE)
 5 Instituto Nacional de Pesquisas Espaciais (INPE)
 6 Instituto Nacional de Pesquisas Espaciais (INPE)
 7 Instituto Tecnológico de Aeronáutica (ITA)
 8 German Aerospace Center (DLR)
 9 German Aerospace Center (DLR)
10 German Aerospace Center (DLR)
11 German Aerospace Center (DLR)
12 German Aerospace Center (DLR)
13 German Aerospace Center (DLR)
14 German Aerospace Center (DLR)
15 German Aerospace Center (DLR)
Endereço de e-Mail do Autor 1 telmo.klipp@gmail.com
 2 adriano.petry@inpe.br
 3 jonas.souza@inpe.br
 4
 5 haroldo.camposvelho@inpe.br
 6 eurico.paula@inpe.br
 7 fean@ita.br
 8 Mainul.Hoque@dlr.de
 9 Martin.Kriegel@dlr.de
10 Jens.Berdermann@dlr.de
11 Norbert.Jakowski@dlr.de
12 Isabel.FernandezGomez@dlr.de
13 Claudia.Borries@dlr.de
14 Hiroatsu.Sato@dlr.de
15 Volker.Wilken@dlr.de
RevistaAdvances in Space Research
Volume64
Número10
Páginas2125-2136
Nota SecundáriaB1_INTERDISCIPLINAR B1_GEOCIÊNCIAS B1_ENGENHARIAS_IV B1_ENGENHARIAS_III B1_BIODIVERSIDADE B3_CIÊNCIA_DA_COMPUTAÇÃO B4_ASTRONOMIA_/_FÍSICA C_CIÊNCIAS_BIOLÓGICAS_I
Histórico (UTC)2019-10-30 10:49:21 :: simone -> administrator ::
2019-10-30 10:50:51 :: administrator -> simone :: 2019
2019-10-30 10:52:00 :: simone -> administrator :: 2019
2020-01-06 11:42:23 :: administrator -> simone :: 2019
3. Conteúdo e estrutura
É a matriz ou uma cópia?é a matriz
Estágio do Conteúdoconcluido
Transferível1
Tipo do ConteúdoExternal Contribution
Tipo de Versãopublisher
Palavras-ChaveIonosphere
Total electron content
Physics-based ionospheric model
Empirical ionospheric model
Seasonal variation
Statistical evaluation
ResumoThis work shows a 20-month statistical evaluation of different Total Electron Content (TEC) estimators for the Central and South America regions. The TEC provided by the International GNSS Service (IGS) in the area covered around the monitoring GNSS stations are used as reference values, and they are compared to TEC estimates from the physics-based (Sheffield University Plasmasphere Ionosphere Model-PIM) and the empirical (Neustrelitz TEC Model-Global-NTCM-GL) models. The mean TEC values show strong dependence on both solar activity and seasonal variation. A clear response was noticed for a period close to 27 days due to the mean solar rotation, as seen in the solar flux measurements. Consistently, the mean TEC values present an annual variation with maxima during December solstices for southern stations with geographic latitudes greater than 25 degrees S. Semi-annual dependence has been observed in TEC for the sector between +/- 25 degrees of geographical latitude but with modulations caused by fluctuation in the solar radiation. We observed a high correlation between solar radio flux F10.7 and NTCM-GL outputs. The fast increases in F10.7 index have caused significant differences between IGS data and NTCM-GL results mainly for equatorial and low latitudes. For the initial months of the evaluated period (January-April, 2016), the errors of the physics-based model were considerably larger, mainly near the equatorial ionization anomaly. The discrepancies observed in SUPIM results are mainly due to inputs of solar EUV flux. The EUVAC model has underestimated EUV flux between January and April, 2016, when the solar activity was moderated and Solar2000 model has overestimated such flux during low solar cycle period between May and August, 2017. In relation to IGS data, the two assessed models presented smaller differences during the June solstice season of 2016.
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4. Condições de acesso e uso
Idiomaen
Arquivo Alvoklipp_evaluation.pdf
Grupo de Usuáriosself-uploading-INPE-MCTI-GOV-BR
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Política de Arquivamentodenypublisher denyfinaldraft24
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VinculaçãoTrabalho não Vinculado à Tese/Dissertação
Unidades Imediatamente Superiores8JMKD3MGPCW/3ESGTTP
8JMKD3MGPCW/3ETL868
8JMKD3MGPCW/3EUFCFP
Lista de Itens Citandosid.inpe.br/bibdigital/2013/09.22.23.14 - 10
sid.inpe.br/mtc-m21/2012/07.13.14.49.40 - 9
sid.inpe.br/bibdigital/2013/10.04.21.53 - 7
DivulgaçãoWEBSCI; PORTALCAPES; COMPENDEX; SCOPUS.
Acervo Hospedeirourlib.net/www/2017/11.22.19.04
6. Notas
Campos Vaziosalternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel e-mailaddress format isbn label lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project rightsholder schedulinginformation secondarydate secondarykey session shorttitle sponsor subject tertiarytype url
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1. Identificação
Tipo de ReferênciaArtigo em Revista Científica (Journal Article)
Sitemtc-m21d.sid.inpe.br
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identificador8JMKD3MGP3W34T/48BJ2KS
Repositóriosid.inpe.br/mtc-m21d/2023/01.09.12.40   (acesso restrito)
Última Atualização2023:01.09.12.40.48 (UTC) simone
Repositório de Metadadossid.inpe.br/mtc-m21d/2023/01.09.12.40.48
Última Atualização dos Metadados2023:01.10.17.38.30 (UTC) administrator
DOI10.3389/fspas.2022.1021910
ISSN2296-987X
Chave de CitaçãoBravoMMBUESVNOVBVGRPCLCFMMSVC:2022:Ev14De
TítuloIonospheric response modeling under eclipse conditions: Evaluation of 14 December 2020, total solar eclipse prediction over the South American sector
Ano2022
MêsDec.
Data de Acesso30 jun. 2025
Tipo de Trabalhojournal article
Tipo SecundárioPRE PI
Número de Arquivos1
Tamanho5493 KiB
2. Contextualização
Autor 1 Bravo, M. A.
 2 Molina, M. G.
 3 Martínez-Ledesma, M.
 4 Barbás, B. de Haro
 5 Urra, B.
 6 Elías, A.
 7 Souza, Jonas Rodrigues de
 8 Villalobos, C.
 9 Namour, J. H.
10 Ovalle, E.
11 Venchiarutti, J. V.
12 Blunier, S.
13 Valdés-Abreu, J. C.
14 Guillermo, E.
15 Rojo, E.
16 Pasquale, L. de
17 Carrasco, E.
18 Leiva, R.
19 Castillo Rivera, C.
20 Foppiano, A.
21 Milla, M.
22 Muñoz, P. R.
23 Stepanova, M.
24 Valdivia, J. A.
25 Cabrera, M.
Identificador de Curriculo 1
 2
 3
 4
 5
 6
 7 8JMKD3MGP5W/3C9JHFE
Grupo 1
 2
 3
 4
 5
 6
 7 DIHPA-CGCE-INPE-MCTI-GOV-BR
Afiliação 1 Universidad Adventista de Chile
 2 Universidad Nacional de Tucumán
 3 Centro Interuniversitario de Física de la Alta Atmósfera
 4 FACET-UNT
 5 Universidad Adventista de Chile
 6 Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
 7 Instituto Nacional de Pesquisas Espaciais (INPE)
 8 Universidad Adventista de Chile
 9 Universidad Nacional de Tucumán
10 Universidad de Concepción
11 FACET-UNT
12 Universidad de Chile
13 Universidad de Chile
14 Universidad Tecnológica Nacional, Bahía Blanca
15 Universidad Adventista de Chile
16 Universidad Tecnológica Nacional, Bahía Blanca
17 Universidad Adventista de Chile
18 Centro Interuniversitario de Física de la Alta Atmósfera
19 Universidad de Concepción
20 Universidad de Concepción
21 Pontificia Universidad Católica del Perú
22 Centro Interuniversitario de Física de la Alta Atmósfera
23 Universidad de Santiago de Chile
24 Universidad de Chile
25 FACET-UNT
Endereço de e-Mail do Autor 1 manuelbravo@unach.cl
 2
 3
 4
 5
 6
 7 jonas.souza63@gmail.com
RevistaFrontiers in Astronomy and Space Sciences
Volume9
Páginase1021910
Histórico (UTC)2023-01-09 12:51:01 :: simone -> administrator :: 2022
2023-01-10 17:38:30 :: administrator -> simone :: 2022
3. Conteúdo e estrutura
É a matriz ou uma cópia?é a matriz
Estágio do Conteúdoconcluido
Transferível1
Tipo do ConteúdoExternal Contribution
Tipo de Versãopublisher
Palavras-Chaveeclipse condition
ionospheric modeling and prediction
ionospheric response
south American sector
total solar eclipse
ResumoIn this work, we evaluate the SUPIM-INPE model prediction of the 14 December 2020, total solar eclipse over the South American continent. We compare the predictions with data from multiple instruments for monitoring the ionosphere and with different obscuration percentages (i.e., Jicamarca, 12.0°S, 76.8°W, 17%; Tucumán 26.9°S, 65.4° W, 49%; Chillán 36.6°S, 72.0°W; and Bahía Blanca, 38.7°S, 62.3°W, reach 95% obscuration) due to the eclipse. The analysis is done under total eclipse conditions and non-total eclipse conditions. Results obtained suggest that the model was able to reproduce with high accuracy both the daily variation and the eclipse impacts of E and F1 layers in the majority of the stations evaluated (except in Jicamarca station). The comparison at the F2 layer indicates small differences (<7.8%) between the predictions and observations at all stations during the eclipse periods. Additionally, statistical metrics reinforce the conclusion of a good performance of the model. Predicted and calibrated Total Electron Content (TEC, using 3 different techniques) are also compared. Results show that, although none of the selected TEC calibration methods have a good agreement with the SUPIM-INPE prediction, they exhibit similar trends in most of the cases. We also analyze data from the Jicamarca Incoherent Scatter Radar (ISR), and Swarm-A and GOLD missions. The electron temperature changes observed in ISR and Swarm-A are underestimated by the prediction. Also, important changes in the O/N2 ratio due to the eclipse, have been observed with GOLD mission data. Thus, future versions of the SUPIM-INPE model for eclipse conditions should consider effects on thermospheric winds and changes in composition, specifically in the O/N2 ratio.
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4. Condições de acesso e uso
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Arquivo Alvofspas-09-1021910.pdf
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5. Fontes relacionadas
Repositório Espelhourlib.net/www/2021/06.04.03.40.25
Unidades Imediatamente Superiores8JMKD3MGPCW/46KTFK8
Lista de Itens Citandosid.inpe.br/bibdigital/2022/04.03.17.52 - 22
sid.inpe.br/mtc-m21/2012/07.13.14.51.12 - 6
DivulgaçãoWEBSCI; PORTALCAPES; SCOPUS.
Acervo Hospedeirourlib.net/www/2021/06.04.03.40
6. Notas
Campos Vaziosalternatejournal archivingpolicy archivist callnumber copyholder copyright creatorhistory descriptionlevel e-mailaddress format isbn label lineage mark nextedition notes number orcid parameterlist parentrepositories previousedition previouslowerunit progress project rightsholder schedulinginformation secondarydate secondarykey secondarymark session shorttitle sponsor subject tertiarymark tertiarytype url
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1. Identificação
Tipo de ReferênciaArtigo em Evento (Conference Proceedings)
Sitemtc-m21c.sid.inpe.br
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identificador8JMKD3MGP3W34R/3SMU5GP
Repositóriosid.inpe.br/mtc-m21c/2019/02.08.15.53
Repositório de Metadadossid.inpe.br/mtc-m21c/2019/02.08.15.53.24
Última Atualização dos Metadados2020:01.06.11.42.09 (UTC) administrator
Chave SecundáriaINPE--PRE/
Chave de CitaçãoLimaFoMaSoSaPaMo:2019:EtDiLb
TítuloThe eta-mi distribution for L-band ionospheric amplitude scintillation modeling and the evaluation of GBAS CAT I services under low latitude regions
Ano2019
Data de Acesso30 jun. 2025
Tipo SecundárioPRE CI
2. Contextualização
Autor1 Lima Filho, Vicente Carvalho
2 Marini, Leonardo Pereira
3 Soussantos, Jonas
4 Salles, Lucas Alves
5 Paula, Eurico Rodrigues de
6 Moraes, Alison O.
Identificador de Curriculo1
2
3
4
5 8JMKD3MGP5W/3C9JH2U
Grupo1
2
3
4
5 DIDAE-CGCEA-INPE-MCTIC-GOV-BR
Afiliação1 Instituto Tecnológico de Aeronáutica (ITA)
2 Instituto Tecnológico de Aeronáutica (ITA)
3 Instituto Tecnológico de Aeronáutica (ITA)
4 Instituto Tecnológico de Aeronáutica (ITA)
5 Instituto Nacional de Pesquisas Espaciais (INPE)
6 Instituto de Aeronáutica e Espaço (IAE)
Endereço de e-Mail do Autor1
2
3
4
5 eurico.paula@inpe.br
Nome do EventoION International Technical Meeting
Localização do EventoReston, Virginia
Data28-31 jan.
Histórico (UTC)2019-02-08 15:54:08 :: simone -> administrator :: 2019
2020-01-06 11:42:09 :: administrator -> simone :: 2019
3. Conteúdo e estrutura
É a matriz ou uma cópia?é a matriz
Estágio do Conteúdoconcluido
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Tipo do ConteúdoExternal Contribution
ResumoThe usage of the GNSS is a world trend among the new technologies for air navigation. Within this context, the FAA developed the Ground-Based Augmentation System (GBAS) to improve accuracy, integrity, and continuity of the GNSS positioning through the augmentation of the GPS observables, in order to support precision approach landings. The GBAS can be considered a safety-critical system due to the precision landing requirements defined by ICAO. The ionospheric layer generates significant interference in the satellite signals and is one of the most threatening issues for the GBAS. Ionospheric scintillation may cause severe damage in the GPS receiver tracking loop operations. In moderated events, scintillation can reduce the accuracy of GPS pseudorange and carrier measurements, but the receiver still remains in lock. The tracking loop performance is degraded by scintillation fades that eventually lead to cycle slips. However, during strong scintillation events, the receiver might not be able to handle the large amount of scintillation, loosing its channels because the signal-to-noise ratio drops below the receiver threshold, resulting in a loss of lock. The strong amplitude scintillation phenomena are usual around the equatorial and low-latitude regions, in a belt of approximately ±20o of geomagnetic latitude. These pronounced scintillation events are related to the presence of depleted structures known as Equatorial Plasma Bubbles (EPBs). EPBs rise in the equatorial and low-latitude regions in the nighttime due to the electrodynamic features in the equatorial plasma bulk. In the equatorial and low-latitude region, after the dusk, the elevation uplift of the plasma implies larger vertical gradients in an opposite direction of the gravity forcing, thus setting the system into an unstable equilibrium. If an external perturbation exists, then this equilibrium may be disturbed and the Rayleigh-Taylor instability action may cause the evolution of such kilometric bubble structures. After this initial step, a cascading process originates structures progressively smaller, whose wavelength will interfere deeply in the satellite transionospheric L-band signals causing the strong amplitude scintillation. In the Brazilian territory such events are more intense during spring and summer months, under high solar flux conditions. Nowadays, scintillations due to plasma bubbles affecting satellites signals during the night are the most significant issues that forbid Brazil from providing CAT I services from a GBAS station, considering the current architecture of the system available. This work analyzes high rate (50Hz) measurements of the GPS L1 (1.575GHz) amplitude scintillation data recorded during one month between December 2001 and January 2002 at São José dos Campos, Brazil (Geographic coordinates: 23.20o S, 45.86o W, -17.50o dip latitude), a place located near to the southern crest of the equatorial ionization anomaly. The goal of this study is to evaluate the use of eta-mi probability density function in the statistical characterization of the ionospheric fading events. The analysis was performed comparing the proposed model against other models widely accepted in the literature, like Nakagami-m and Rice models, and additionally, the comparison is extended against the alpha-mi model. The results of the analysis performed showed that the eta-mi distribution presents good results on fitting empirical data of scintillation. This capability may help to better characterize fading events for example for GBAS availability studies. Typical pairs of eta-mi coefficients are presented as well as a discussion about the fading profile based on such values. The comparison of eta-mi distribution to Rice, Nakagami-m and alpha-mi models showed that eta-mi is capable of describing a wide range of scenarios with a fair adjustment in the tail of the distribution. This topological adjustment is an advantage of bivariate distributions like the alpha-mi and eta-mi models in comparison with the single parameter distributions. The fit test results show that the alpha-mi distribution has a similar performance to the eta-mi model, both providing a flexibility that better adjusts to the measured data, in particular in the tail of the distribution. Additionally, in this work the estimation of the fading coefficients eta-mi is explored according to the experimental data, providing empirical values for theoretical works and discussing the benefits of this proposed model and other models adopted in the literature. Equations presenting an approximation useful for theoretical works are also proposed based on the results. Finally, a discussion about the bit error probability and mean time between cycle slips is also included showing estimated values using the eta-mi model. Based on these results, it is analyzed how this geophysical phenomenon may generate unacceptable threatening gradients that, occasionally, will restrict GBAS to operate safely during the nighttime in low latitude regions.
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6. Notas
Campos Vaziosarchivingpolicy archivist booktitle callnumber copyholder copyright creatorhistory descriptionlevel dissemination doi e-mailaddress edition editor format isbn issn keywords label lineage mark mirrorrepository nextedition notes numberoffiles numberofvolumes orcid organization pages parameterlist parentrepositories previousedition previouslowerunit progress project publisher publisheraddress readpermission rightsholder schedulinginformation secondarydate secondarymark serieseditor session shorttitle size sponsor subject targetfile tertiarymark tertiarytype type url versiontype volume
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