Why do so few people cycle for transport in Australia? Six ideas on how to reap all the benefits of bikes
Less than 1% of the 12 million Australians who traveled to work on Census Day in 2021 rode a bicycle to get there.
Jun 3, 2024
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31
Engineering
Less than 1% of the 12 million Australians who traveled to work on Census Day in 2021 rode a bicycle to get there.
Jun 3, 2024
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31
Engineering
A cutting-edge method for Global Navigation Satellite System (GNSS) ambiguity resolution has been developed, promising to enhance the accuracy and reliability of urban positioning. This innovative approach addresses the longstanding ...
May 28, 2024
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Internet
A total of 4.6 billion people are connected to the internet through their mobile phones. For each of these people, there are more than three devices communicating with the internet. The Internet of Things (IoT) is composed ...
May 21, 2024
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Internet
Amazon will open a new logistics center in Everett, Washington, for its broadband satellite network, Project Kuiper, expanding its ability to design, test and manufacture satellites in the Puget Sound region.
May 15, 2024
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2
Engineering
A study has outlined the critical needs and essential technologies for a low Earth orbit (LEO) constellation to augment satellite navigation systems, significantly improving the Positioning, Navigation and Timing (PNT) services. ...
May 7, 2024
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1
Engineering
The development of the world's most performant neural network module for accurately extracting objects from aerial and satellite imagery is expected to have wide applications across various fields, according to DGIST and ...
Apr 22, 2024
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2
Engineering
In the evolving Global Navigation Satellite Systems (GNSS) landscape, China's International GNSS Monitoring and Assessment System (iGMAS) stands out for its global monitoring and evaluation of GNSS constellations.
Apr 15, 2024
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2
Engineering
A new assessment study identifies areas in Mexico City's metro system affected by land subsidence, providing a roadmap for mitigating damage, prioritizing repairs, and informing future designs for the metro's infrastructure.
Mar 21, 2024
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19
Telecom
Researchers have developed a Dual-assisted Multi-component Tracking (DMT) technique that significantly enhances the precision of Global Navigation Satellite Systems (GNSS). This innovation promises to enhance satellite navigation ...
Mar 13, 2024
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7
Telecom
Through steady advances in the development of quantum computers and their ever-improving performance, it will be possible in the future to crack our current encryption processes. To address this challenge, researchers at ...
Mar 13, 2024
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In the context of spaceflight, a satellite is an object which has been placed into orbit by human endeavor. Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as the Moon.
The first artificial satellite, Sputnik 1, was launched by the Soviet Union in 1957. By 2009 thousands of satellites have been launched into orbit around the Earth. These originate from more than 50 countries and have used the satellite launching capabilities of ten nations. A few hundred satellites are currently operational, whereas thousands of unused satellites and satellite fragments orbit the Earth as space debris. A few space probes have been placed into orbit around other bodies and become artificial satellites to the Moon, Venus, Mars, Jupiter and Saturn.
Satellites are used for a large number of purposes. Common types include military (spy) and civilian Earth observation satellites, communication satellites, navigation satellites, weather satellites, and research satellites. Space stations and human spacecraft in orbit are also satellites. Satellite orbits vary greatly, depending on the purpose of the satellite, and are classified in a number of ways. Well-known (overlapping) classes include low Earth orbit, polar orbit, and geostationary orbit.
Satellites are usually semi-independent computer controlled systems. Satellite subsystems attend many tasks, such as power generation, thermal control, telemetry, attitude control and orbit control.
This text uses material from Wikipedia, licensed under CC BY-SA