Satellite‐based augmentation systems: A novel and cost‐effective tool for ionospheric and space weather studies
Surendra Sunda,R. Sridharan,B. M. Vyas,P. V. Khekale,K. S. Parikh,A. S. Ganeshan,C. R. Sudhir,S. V. Satish,Mala S. Bagiya +8 more
TLDR
This paper proposes and demonstrates SBAS applicability to ionospheric and space weather research in a novel and cost‐effective way and vindicate the potential of SBAS over extended areas.Abstract:
Satellite-Based Augmentation Systems (SBASes) are designed to provide additional accuracy and robustness to existing satellite-based radio navigation systems for all phases of a flight. However, similar to navigation systems such as GPS which has proven its worth for the investigation of the ionosphere, the SBASes do have certain advantages. In the present paper, we propose and demonstrate SBAS applicability to ionospheric and space weather research in a novel and cost-effective way. The recent commissioning of the Indian SBAS, named GPS Aided Geo Augmented Navigation (GAGAN), covering the equatorial and low-latitude regions centered around the Indian longitudes provides the motivation for this approach. Two case studies involving different ionospheric behavior over low-latitude regions vindicate the potential of SBAS over extended areas.read more
Citations
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Journal ArticleDOI
Longitudinal and Seasonal Variability of Equatorial Ionospheric Irregularities and Electrodynamics
Journal ArticleDOI
The impact of the 17 March 2015 St. Patrick's Day storm on the evolutionary pattern of equatorial ionization anomaly over the Indian longitudes using high‐resolution spatiotemporal TEC maps: New insights
TL;DR: The impact of the St. Patrick's Day storm (17 March 2015) on the major equatorial electro-dynamical process viz., the Equatorial Ionization Anomaly (EIA) has been assessed using 2D (5 ° lat. x 5 ° long) total electron content (TEC) maps generated from the ground based SBAS (Satellite Based Augmentation System) enabled receiver data.
Journal ArticleDOI
Evaluation of GPS Standard Point Positioning with Various Ionospheric Error Mitigation Techniques
TL;DR: In this article, the authors investigated the accuracy of single and dual-frequency GPS point positioning solutions employing different ionosphere error mitigation techniques, including global ionosphere maps and geomagnetic reference fields.
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Geomagnetic Activity Control of Irregularities Occurrences Over the Crests of the African EIA
P. O. Amaechi,Elijah Oyeyemi,Andrew O. Akala,Christine Amory-Mazaudier,Christine Amory-Mazaudier +4 more
TL;DR: In this article, the user has requested enhancement of the downloaded file and this article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process which may lead to differences between this version and the Version of Record.
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Modelling of ionospheric time delays based on adjusted spherical harmonic analysis
TL;DR: In this article, a regional ionospheric model based on the adjusted spherical harmonic analysis (ASHA) is implemented to study the ionosphere temporal variations, and the results indicate that the ASHA model is one of the contenders for estimating ionosphere delays well for GNSS augmentation systems.
References
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A global mapping technique for GPS‐derived ionospheric total electron content measurements
TL;DR: In this paper, a technique for retrieving the global distribution of vertical total electron content (TEC) from GPS-based measurements is described, based on interpolating TEC within triangular tiles that tessellate the ionosphere modeled as a thin spherical shell.
Ionospheric Effects on GPS
TL;DR: In this paper, the authors describe the major effects of the ionosphere on GPS performance, including the following: 1) group delay of the signal modulation, or absolute range error, 2) carrier phase advance, or relative range error; 3) Doppler shift, or range-rate errors; 4) Faraday rotation of linearly polarized signals; 5) refraction or bending of the radio wave; 6) distortion of pulse waveforms; 7) signal amplitude fading or amplitude scintillation; and 8) phase scintillations.
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Temporal and spatial variations in TEC using simultaneous measurements from the Indian GPS network of receivers during the low solar activity period of 2004-2005
TL;DR: In this paper, the authors presented the temporal and spatial variations in TEC derived from the simultaneous and continuous measurements made, for the first time, using the Indian GPS network of 18 receivers located from the equator to the northern crest of the equatorial ionization anomaly (EIA) region and beyond, covering a geomagnetic latitude range of 1° S to 24° N, using a 16-month period of data for the low sunspot activity (LSSA) years of March 2004 to June 2005.
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Derivation of TEC and estimation of instrumental biases from GEONET in Japan
Guanyi Ma,T. Maruyama +1 more
TL;DR: In this article, a method to derive the ionospheric total electron content (TEC) and to estimate the biases of GPS satellites and dual frequency receivers using the GPS Earth Observation Network (GEONET) in Japan is presented.
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TEC variations during low solar activity period (2005–2007) near the Equatorial Ionospheric Anomaly Crest region in India
TL;DR: In this paper, the authors analyzed the ionospheric variations in terms of Total Electron Content (TEC) for the low solar activity period from April 2005 to December 2007, and found that TEC at Rajkot is at its maximum during Equinoctial months (March, April, September, October), and minimum during the Winter months (November, December, January, February), with intermediate values during Summer months (May, June, July, August), showing a semi annual variation.