Results 1 to 10 of about 2,008,594 (353)

A low-cost solution for unmanned aerial vehicle navigation in a global positioning system–denied environment

open access: yesInternational Journal of Distributed Sensor Networks, 2018
The ability of an autonomous unmanned aerial vehicle to navigate and fly precisely determines its utility and performance. The current navigation systems are highly dependent on the global positioning system and are prone to error because of global ...
Shahrukh Ashraf   +5 more
doaj   +2 more sources

Relativity in the Global Positioning System [PDF]

open access: goldLiving Reviews in Relativity, 2002
We need general relativity to understand extreme astrophysical realms. But the theory also turns out to be essential for the many mundane activities that nowadays rely on the precision of the GPS.
Neil Ashby
openaire   +7 more sources

Global Positioning System

open access: yes, 1992
Herbert Lichtenegger   +2 more
openaire   +3 more sources

Wetland vegetation changes in response to climate change and human activities on the Tibetan Plateau during 2000–2015

open access: yesFrontiers in Ecology and Evolution, 2023
The Tibetan Plateau (TP), known as the third pole, is the highest plateau in the world. It has numerous wetlands, which are important ecological security barriers and plays an important role in mitigating global climate change. This paper employed breaks
Yuhan Chen   +11 more
doaj   +1 more source

Real‐time and dynamic time transfer method based on double‐differenced real‐time kinematic mode

open access: yesIET Radar, Sonar & Navigation, 2021
In this study, a real‐time and dynamic time transfer method based on double‐differenced (DD) real‐time kinematic (RTK) mode is proposed. First, the method forms the DD observations of Global Navigation Satellite System (GNSS) to fix the DD ambiguity, and
Rui Tu   +7 more
doaj   +1 more source

Global positioning system

open access: yes, 2010
The Global positioning system is a U.S. space-based global navigation satellite system. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789 ...
Pochatko, Tetiana Volodymyrivna   +1 more
openaire   +3 more sources

Search for domain wall dark matter with atomic clocks on board global positioning system satellites [PDF]

open access: yesNature Communications, 2017
Cosmological observations indicate that dark matter makes up 85% of all matter in the universe yet its microscopic composition remains a mystery. Dark matter could arise from ultralight quantum fields that form macroscopic objects. Here we use the global
B. Roberts   +8 more
semanticscholar   +1 more source

Development of Precise Point Positioning Method Using Global Positioning System Measurements [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2011
Precise point positioning (PPP) is increasingly used in several parts such as monitoring of crustal movement and maintaining an international terrestrial reference frame using global positioning system (GPS) measurements.
Byung-Kyu Choi   +4 more
doaj   +1 more source

A bagging tree-based pseudorange correction algorithm for global navigation satellite system positioning in foliage canyons

open access: yesInternational Journal of Distributed Sensor Networks, 2021
Global navigation satellite system is indispensable to provide positioning, navigation, and timing information for pedestrians and vehicles in location-based services.
Fan Qin   +3 more
doaj   +1 more source

Improving the Accuracy of Static Relative GPS Positioning using Genetic Algorithm [PDF]

open access: yesEngineering and Technology Journal, 2010
Over the years, the Global Positioning System (GPS) has evolved to become an important navigational and positional system and is widely used across the world.
Farazdak Rafeek Yasien
doaj   +1 more source

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