Resultado da Pesquisa
A expressão de busca foi <related:sid.inpe.br/mtc-m21c/2019/10.30.10.49.21-0:en:title:2:ionospheric evaluation models central:evaluation ionospheric models central south americas:>.
2 referências encontradas buscando em 11 dentre 14 sites.
Eventualmente nem todas as referências esperadas puderam ser exibidas porque o acesso a pelo menos um site falhou.
Data e hora local de busca: 24/11/2020 00:10.
Área de identificação
Tipo da ReferênciaJournal 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 simone
Metadadossid.inpe.br/mtc-m21c/2019/10.30.10.49.21
Última Atualização dos Metadados2020:02.10.16.58.46 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 Acesso24 nov. 2020
Número de Arquivos1
Tamanho4519 KiB
Área de 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
Nota SecundáriaB1_INTERDISCIPLINAR B1_GEOCIÊNCIAS B1_ENGENHARIAS_IV B1_ENGENHARIAS_III B1_BIODIVERSIDADE B3_CIÊNCIA_DA_COMPUTAÇÃO B4_ASTRONOMIA_/_FÍSICA C_CIÊNCIAS_BIOLÓGICAS_I
Histórico2019-10-30 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
Área de conteúdo e estrutura
É a matriz ou uma cópia?é a matriz
Estágio do Documentoconcluido
Estágio do Documentonot transferred
Transferível1
Tipo do ConteudoExternal Contribution
Tipo SecundárioPRE PI
Tipo de Versãopublisher
Número10
Páginas2125-2136
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.
AreaCEA
Tipo de Trabalhojournal article
Conteúdo da Pasta sourcenão têm arquivos
Conteúdo da Pasta agreement
agreement.html 30/10/2019 08:49 1.0 KiB 
Área de condições de acesso e uso
Idiomaen
Arquivo Alvoklipp_evaluation.pdf
e-Mail (login)simone
Grupo de Usuáriosself-uploading-INPE-MCTI-GOV-BR
simone
Grupo de Leitoresadministrator
simone
Visibilidadeshown
Política de Arquivamentodenypublisher denyfinaldraft24
Permissão de Leituradeny from all and allow from 150.163
Área de fontes relacionadas
VinculaçãoTrabalho não Vinculado à Tese/Dissertação
Unidades Imediatamente Superiores8JMKD3MGPCW/3ESGTTP
8JMKD3MGPCW/3ETL868
8JMKD3MGPCW/3EUFCFP
DivulgaçãoWEBSCI; PORTALCAPES; COMPENDEX; SCOPUS.
Acervo Hospedeirourlib.net/www/2017/11.22.19.04
Área de 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 secondarydate secondarykey session shorttitle sponsor subject tertiarytype url
Área de controle da descrição
atualizar 
Área de identificação
Tipo da ReferênciaConference 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
Metadadossid.inpe.br/mtc-m21c/2019/02.08.15.53.24
Última Atualização dos Metadados2020:01.06.11.42.09 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
Data28-31 jan.
Data de Acesso24 nov. 2020
Área de 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
Histórico2019-02-08 15:54:08 :: simone -> administrator :: 2019
2020-01-06 11:42:09 :: administrator -> simone :: 2019
Área de conteúdo e estrutura
Estágio do Documentoconcluido
Estágio do Documentonot transferred
Transferível1
Tipo do ConteudoExternal Contribution
Tipo SecundárioPRE CI
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.
AreaCEA
Conteúdo da Pasta sourcenão têm arquivos
Conteúdo da Pasta agreement
agreement.html 08/02/2019 13:53 1.0 KiB 
Área de condições de acesso e uso
Idiomaen
e-Mail (login)simone
Grupo de Usuáriossimone
Grupo de Leitoresadministrator
simone
Visibilidadeshown
Área de fontes relacionadas
Unidades Imediatamente Superiores8JMKD3MGPCW/3ETL868
Acervo Hospedeirourlib.net/www/2017/11.22.19.04
Área de notas
Campos Vaziosaccessionnumber archivingpolicy 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 secondarydate secondarymark serieseditor session shorttitle size sponsor subject targetfile tertiarymark tertiarytype type url versiontype volume
Área de controle da descrição
atualizar