A deep fading assessment of the modernized L2C and L5 signals for low-latitude regions

Salles, Lucas Alves; Moraes, Alison de Oliveira; Vani, Bruno César; Sousasantos, Jonas; Affonso, Bruno J.; Monico, J. F. Galera

doi:10.1007/s10291-021-01157-4

Cited by 15 publications

(9 citation statements)

References 20 publications

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“…(2021) and Salles, Moraes et al. (2021) showed that L2C and L5 are more degraded than the L1 carrier, hence, it is expected that the alignment condition will prejudice even more the availability of these optional frequencies. In addition, it is true that dual frequency approach may be effective to monitor ionospheric gradients (Felux et al., 2017), notwithstanding, when alignment condition occurs, the eventual loss of receiver lock may cause the loss of the observables and the consequent impossibility of gradient estimation.…”

Section: Resultsmentioning

confidence: 99%

Amplitude Scintillation Severity and Fading Profiles Under Alignment Between GPS Propagation Paths and Equatorial Plasma Bubbles

et al. 2022

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The low-latitude ionospheric phenomenology has strong influence over transionospheric signals such as those used by the Global Navigation Satellite System (GNSS) (Basu et al., 1988;Kintner et al., 2001). In this dynamic environment, during nighttime, the development of large depletions in the ionospheric plasma density, known as Equatorial Plasma Bubbles (EPBs), may interfere in the satellite links in different ways. There are two major issues of interest regarding GNSS signals over low latitudes, the ionospheric

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Section: Resultsmentioning

confidence: 99%

Amplitude Scintillation Severity and Fading Profiles Under Alignment Between GPS Propagation Paths and Equatorial Plasma Bubbles

et al. 2022

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“…Part of this data can also be accessed through the ISMR Query Tool that will be described later in this paper. the ionosphere and its effects on GNSS under different perspectives, such as receiver design, performance and potential vulnerabilities (Moraes et al 2014;Salles et al 2021;Veettil et al 2011;, effects on GNSS positioning and mitigation (Marques et al 2016;2018;Park et al 2017;Vani et al 2019;Veettil et al 2020), climatology and monitoring the ionosphere (Pereira et al 2017;Spogli et al 2013;Vani et al 2021), among others.…”

Section: The Cornell Scintillation Monitor (Csm) Networkmentioning

confidence: 99%

A Retrospective of Global Navigation Satellite System Ionospheric Irregularities Monitoring Networks in Brazil

Paula

Monico

Tsuchiya

et al. 2023

J. Aerosp. Technol. Manag.

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The use of Global Navigation Satellite System (GNSS) for air and terrestrial navigation and for many applications is increasing in the last decades. However, the Earth's ionosphere causes GNSS signal delay due to the total electron content (TEC) and scintillation in the signal phase and amplitude. This scintillation can give rise to deleterious effects in the GNSS positioning. So, it is important to assess the effects of the ionosphere over the GNSS signal. To achieve this goal, it is necessary to have a large spatial and temporal coverage of data from many different sounders, being the GNSS receivers of great importance due to their global coverage and availability. In this work, we present a retrospective of the scintillation monitoring networks in Brazil and their characteristics. As the RBMC network managed by the IBGE provides TEC and as rate of TEC index (ROTI) is well correlated with ionospheric irregularities, we present also the RBMC network description. These RBMC GNSS receivers provide data in regions with scarcity of scintillation monitors. The description of the Ionospheric Scintillation Monitoring Receivers (ISMR) Query Tool, that is a web software that has been supporting research on the ISMR data, is also presented.

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“…Two studies presented detailed assessments of the fading characteristics of the modernized signals. Salles et al (2021a) provided empirical probability distributions of scintillation occurrence, average fading rate and durations at different Brazilian locations. The results confirmed the results by Moraes et al (2018b), indicating that greater probabilities of strong scintillation occurrences are expected for the modernized L2C and L5 signals.…”

Section: Statistical Modeling Of Ionospheric Scintillationmentioning

confidence: 99%

The GNSS NavAer INCT Project Overview and Main Results

Monico

Paula

Moraes

et al. 2022

J. Aerosp. Technol. Manag.

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Air navigation is increasingly dependent on the use of Global Navigation Satellite Systems (GNSS). It allows the determination of the aircraft's position in all phases of the flight and brings many advantages. Although GNSS navigation results in gains, the radio signals from these systems are strongly influenced by the ionospheric environment. It introduces errors that can affect the accuracy, integrity, availability and continuity requirements established by the International Civil Aviation Organization (ICAO). The ionospheric layer has different behaviors depending on the latitude, time of day, season of the year, geomagnetic activity and solar cycle. Since Brazil is located in a region of low latitudes, it experiences a series of unique challenges when compared to regions of mid-latitudes. For this reason, the application of GNSS-based technologies in aviation over the Brazilian territory requires an in-depth assessment of the ionosphere effects. Therefore, the Instituto Nacional de Ciência e Tecnologia (INCT) named GNSS Technology for Supporting Air Navigation was formed in 2017 to better assess the ionosphere impacts and assist government agencies and companies in the development of safe air navigation procedures over Brazil in a near future. This paper presents the most relevant advances achieved so far within this multidisciplinary project that involves Brazilian research centers and universities.

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A deep fading assessment of the modernized L2C and L5 signals for low-latitude regions

Cited by 15 publications

References 20 publications

Amplitude Scintillation Severity and Fading Profiles Under Alignment Between GPS Propagation Paths and Equatorial Plasma Bubbles

Amplitude Scintillation Severity and Fading Profiles Under Alignment Between GPS Propagation Paths and Equatorial Plasma Bubbles

A Retrospective of Global Navigation Satellite System Ionospheric Irregularities Monitoring Networks in Brazil

The GNSS NavAer INCT Project Overview and Main Results

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