Journal ArticleDOI
Impact of multiconstellation satellite signal reception on performance of satellite‐based navigation under adverse ionospheric conditions
Ashik Paul,K. S. Paul,A. Das +2 more
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TLDR
In this paper, the authors showed increased availability of GPS, GLONASS and GALILEO from Calcutta compared to GPS-only scenario and estimates intense scintillation-free (S4, < 0.6) satellite vehicle look angles at different hours of the post-sunset period 19:00-01:00LT during March 2014.Abstract:
Application of multi-constellation satellites to address the issue of satellite signal outages during periods of equatorial ionospheric scintillations could prove to be an effective tool for maintaining the performance of satellite-based communication and navigation without compromise in accuracy and integrity. A receiver capable of tracking GPS, GLONASS and GALILEO satellites is operational at the Institute of Radio Physics and Electronics, University of Calcutta, Calcutta, India located near the northern crest of the Equatorial Ionization Anomaly (EIA) in the Indian longitude sector. The present paper shows increased availability of satellites combining GPS, GLONASS and GALILEO constellations from Calcutta compared to GPS-only scenario and estimates intense scintillation-free (S4 < 0.6) satellite vehicle look angles at different hours of the post-sunset period 19:00-01:00LT during March 2014. A representative case of March 1, 2014 is highlighted in the paper and overall statistics for March 2014 presented to indicate quantitative advantages in terms of scintillation-free satellite vehicle look angles that may be utilized for planning communication and navigation channel spatial distribution under adverse ionospheric conditions. Number of satellites tracked and receiver position deviations has been found to show a good correspondence with the occurrence of intense scintillations and poor user receiver-satellite link geometry. The ground projection of the 350-km subionospheric points corresponding to multi-constellation shows extended spatial coverage during periods of scintillations (0.2 < S4 < 0.6) compared to GPS.read more
Citations
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Relative entropy-based Kalman filter for seamless indoor/outdoor multi-source fusion positioning with INS/TC-OFDM/GNSS
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Degradation of Satellite‐Based Navigation Performance Observed From an Anomaly Crest Location in the Indian Longitude Sector
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Study of Relative Performance of Different Navigational Satellite Constellations Under Adverse Ionospheric Conditions
S. Goswami,Ashik Paul,S. Haldar +2 more
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Interfrequency Performance Characterizations of GPS During Signal Outages From an Anomaly Crest Location
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The Effects of Ionospheric Irregularities on the Navigational Receivers and Its Mitigation
TL;DR: The paper suggests the use of adaptive software-based receiver model or modified hardware receivers to mitigate the effects of amplitude and phase fluctuations due to irregular ionosphere.
References
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Journal ArticleDOI
Characteristics of intense space weather events as observed from a low latitude station during solar minimum
TL;DR: In this article, the authors used a dual-frequency high-resolution software-based GPS receiver to monitor TEC and phase from Calcutta, India situated near the northern crest of the Equatorial Ionization Anomaly for studying some Space Weather events during 2008-2010.
Journal ArticleDOI
Impact of equatorial ionospheric irregularities on GNSS receivers using real and synthetic scintillation signals
F. Ghafoori,Susan Skone +1 more
TL;DR: In this article, the impact of L-band equatorial ionospheric scintillation on Global Navigation Satellite Systems (GNSS) receivers is investigated using both real and synthetic scintillillation data.
Journal ArticleDOI
Statistics of GNSS amplitude scintillation occurrences over Dakar, Senegal, at varying elevation angles during the maximum phase of solar cycle 24
Journal ArticleDOI
Estimation of satellite-based augmentation system grid size at low latitudes in the indian zone
TL;DR: In this paper, an optimum grid size for reliable operation of the Satellite-Based Augmentation System (SBAS) in the Indian subcontinent (GAGAN), or GPS and Geo Augmented Navigation, is estimated.
Journal ArticleDOI
Characteristics of SBAS grid sizes around the northern crest of the equatorial ionization anomaly
Ashik Paul,A. Das,A. DasGupta +2 more
TL;DR: In this article, the authors highlight the necessity for a differential grid size around the northern crest of the EIA using data recorded from stations under the Indian SBAS GAGAN during the moderate sunspot number year 2004.