Search Results - "constellation"
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Analysis of multi-constellation GNSS signal quality
Published 2016“…The GNSS signal observation quality and bias investigation involved a thorough review, analysis and quantification of the constellation error sources and mitigation processes, also, focusing on those effects which cannot be eliminated or modeled. …”
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Bridging clock gaps in Mega-Constellation LEO satellites
Published 2022“…In recent years, mega-constellation Low Earth Orbit (LEO) satellites have been proposed as an augmentation to the Global Navigation Satellite System (GNSS) for positioning on the ground, especially for those in measurement environments with limited satellite visibility. …”
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Nanosatellites constellation as an IoT communication platform for near equatorial countries
Published 2017“…The constellation design i.e. the orbital plane and number of satellites and launch deployment concepts are presented.…”
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Triple Frequency precise point positioning with multi-constellation GNSS
Published 2017“…The availability of signals on three or more frequencies from multiple GNSS constellations provides opportunities for improving precise point positioning (PPP) convergence time and accuracy, compared to when using dual-frequency observations from a single constellation. …”
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QoS Simulation and analysis of HTTP over LEO satellite constellation
Published 2012“…The results show clearly that QoS can be achieved with IP Diffserv over satellites constellation like Iridium.…”
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QoS simulation and analysis of HTTP over LEO satellite constellation
Published 2012“…The results show clearly that QoS can be achieved with IP Diffserv over satellites constellation like Iridium.…”
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Proposed Orbital Products for Positioning Using Mega-Constellation LEO Satellites
Published 2020“…With thousands of low Earth orbit (LEO) satellites to be launched in the near future, LEO mega-constellations are supposed to significantly change the positioning and navigation service for ground users. …”
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Integer ambiguity Resolution in Multi-constellation GNSS for LEO Satellites POD
Published 2023“…Applying IAR has improved the orbital accuracy for all single- and dual-constellation scenarios, and was shown to be especially helpful in reducing the once-per-revolution systematic effects in the along-track orbital errors, with over 50% improvement when using the COM products. …”
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The potential of LEO mega-constellations in aiding GNSS to enable positioning in challenging environments
Published 2022“…Signals from the emerging Low Earth Orbit (LEO) satellites from mega-constellations that broadcast internet, such as Starlink (Space X), OneWeb, Iridium etc., also known as “signals of opportunity” (SOP), can potentially aid positioning. …”
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Leveraging Future LEO Constellations for the Precise Orbit Determination of Lower Small Satellites
Published 2024“…Simulated orbits for the entire constellation and the true trajectory of the CubeSat are used to simulate the navigation signals from the LEO constellation to the CubeSat. …”
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Metatextual reconstruction of Chineseness as a site of constellation in Tash Aw’s literary representation
Published 2023“…Through the strategic juxtaposition and comparison of fluidly correlated narratives, the structural flaw built within the theoretical terrain of Chineseness would possibly be bridged, which foreshadows a constellation of multilayered Chineseness to come…”
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On biases in precise point positioning with multi-constellation and multi-frequency GNSS data
Published 2016“…In both cases, measurements from single and multiple constellations are addressed. It is suggested that the satellite-related code biases be handled as calibrated quantities that are obtained from multi-GNSS experiment products and the fractional phase cycle biases obtained from a network to allow for integer ambiguity fixing. …”
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PAR Reduction in Space-Time Coded OFDM via Modified Active Constellation Extension
Published 2008“…In this paper, we propose Modified Active Constellation Extension (Modified ACE) method for STC encoded OFDM systems to provide 3.5dB of PAR improvement at a 10(-3) complementary cumulative density function (CCDF) of PAR. …”
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Integrity monitoring scheme for undifferenced and uncombined multi-frequency multi-constellation PPP-RTK
Published 2023“…As the traditional advanced receiver autonomous integrity monitoring (ARAIM) method is designed for (smoothed) pseudorange-based positioning, the complexity of multi-frequency multi-constellation PPP-RTK using carrier phase measurements has not been given sufficient consideration. …”
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Evaluation of accuracy, integrity and availability of ARNS multi-constellation signals for aviation users in Australia
Published 2017“…With these systems, multi-frequency multi-constellation (MFMC) GNSS may become a primary means of navigation in the next decade for all phases of flight operations, including precision approach. …”
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