Articles with "constellation" as a keyword



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Determination of Global Earth Outgoing Radiation at High Temporal Resolution using a Theoretical Constellation of Satellites

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Published in 2017 at "Journal of Geophysical Research"

DOI: 10.1002/2016jd025514

Abstract: New, viable, and sustainable observation strategies from a constellation of satellites have attracted great attention across many scientific communities. Yet the potential for monitoring global Earth outgoing radiation using such a strategy has not been… read more here.

Keywords: earth outgoing; constellation satellites; outgoing radiation; global earth ... See more keywords
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Emergence of a unique SARS‐CoV‐2 Delta sub‐cluster harboring a constellation of co‐appearing non‐Spike mutations

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Published in 2022 at "Journal of Medical Virology"

DOI: 10.1002/jmv.28413

Abstract: Accumulation of diverse mutations across the structural and nonstructural genes is leading to rapid evolution of SARS‐CoV‐2, altering its pathogenicity. We performed whole genome sequencing of 239 SARS‐CoV‐2 RNA samples collected from both adult and… read more here.

Keywords: spike mutations; appearing non; delta sub; constellation ... See more keywords
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Validation of the Version 05 Level 2 precipitation products from the GPM Core Observatory and constellation satellite sensors

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Published in 2018 at "Quarterly Journal of the Royal Meteorological Society"

DOI: 10.1002/qj.3175

Abstract: The accurate measurement of precipitation, an essential source of freshwater, is key for assessing water resources and precipitation-related hazards across the globe. The measurement of global precipitation is hampered by the inadequate spatial distribution of… read more here.

Keywords: precipitation; light precipitation; precipitation products; precipitation intensities ... See more keywords
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Reference system origin and scale realization within the future GNSS constellation “Kepler”

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Published in 2020 at "Journal of Geodesy"

DOI: 10.1007/s00190-020-01441-0

Abstract: Currently, Global Navigation Satellite Systems (GNSS) do not contribute to the realization of origin and scale of combined global terrestrial reference frame (TRF) solutions due to present system design limitations. The future Galileo-like medium Earth… read more here.

Keywords: kepler; system; origin scale; realization ... See more keywords
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Hybrid constellation design using a genetic algorithm for a LEO-based navigation augmentation system

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Published in 2020 at "GPS Solutions"

DOI: 10.1007/s10291-020-00977-0

Abstract: A low earth orbit (LEO) constellation can support broadband Internet access and can also be a platform for navigation augmentation for global navigation satellite systems. LEO satellites have the potential to transmit very strong navigation… read more here.

Keywords: navigation; visible satellites; navigation augmentation; constellation ... See more keywords
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Regional positioning using a low Earth orbit satellite constellation

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Published in 2018 at "Celestial Mechanics and Dynamical Astronomy"

DOI: 10.1007/s10569-017-9811-7

Abstract: Global and regional satellite navigation systems are constellations orbiting the Earth and transmitting radio signals for determining position and velocity of users around the globe. The state-of-the-art navigation satellite systems are located in medium Earth… read more here.

Keywords: low earth; earth orbit; navigation; earth ... See more keywords
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Interactions of the space debris environment with mega constellations—Using the example of the OneWeb constellation

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Published in 2017 at "Acta Astronautica"

DOI: 10.1016/j.actaastro.2016.11.021

Abstract: Abstract Recently, several announcements have been published to deploy satellite constellations into Low Earth Orbit (LEO) containing several hundred to thousands of rather small sized objects. The purpose of these constellations is to provide a… read more here.

Keywords: mega constellations; example; space debris; constellation ... See more keywords
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CubeSat constellations for disaster management in remote areas

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Published in 2018 at "Acta Astronautica"

DOI: 10.1016/j.actaastro.2017.12.050

Abstract: Abstract In recent years, CubeSats have considerably extended their range of possible applications, from a low cost means to train students and young researchers in space related activities up to possible complementary solutions to larger… read more here.

Keywords: space; time; disaster management; constellation ... See more keywords
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Assessment of constellation designs for earth observation: Application to the TROPICS mission

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Published in 2019 at "Acta Astronautica"

DOI: 10.1016/j.actaastro.2019.05.007

Abstract: Abstract The orbit and constellation design process for Earth observation missions is complex and it involves trades between mission lifetime, instrument performance, coverage, cost, and robustness among others. This paper describes an orbit and constellation… read more here.

Keywords: tropics mission; mission; constellation designs; constellation ... See more keywords
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Quick coverage analysis of mega Walker Constellation based on 2D map

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Published in 2021 at "Acta Astronautica"

DOI: 10.1016/j.actaastro.2021.07.008

Abstract: Abstract Providing communication and internet services by mega constellation is the developing trend of the communication system. For the requirement of quick analysis of mega Walker constellation, utilizing the symmetry of the constellation, a continuous… read more here.

Keywords: analysis mega; coverage; constellation; coverage performance ... See more keywords
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High Energy Modular Ensemble of Satellites Mission: Towards the final Full Constellation

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Published in 2021 at "Acta Astronautica"

DOI: 10.1016/j.actaastro.2021.08.024

Abstract: Abstract The High Energy Modular Ensemble of Satellites (HERMES) project intends to build an all-sky monitor operating from keV to MeV for the detection and localisation of transient events, like gamma ray bursts. HERMES is… read more here.

Keywords: ensemble satellites; constellation; high energy; modular ensemble ... See more keywords