Machine learning & AI
A model invented by researchers at MIT and Qatar Computing Research Institute (QCRI) that uses satellite imagery to tag road features in digital maps could help improve GPS navigation.
Jan 23, 2020
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79
Energy & Green Tech
The most productive places on Earth for solar power are farmlands, according to an Oregon State University study.
Aug 8, 2019
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1439
Energy & Green Tech
Solar power researchers have traditionally only used the power measurements from single residential solar photovoltaic (PV) systems to estimate the power generated within a city. But one installation isn't a good representation ...
May 28, 2019
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79
Hi Tech & Innovation
A Boston-based startup is setting out to show the use of phones for better weather forecasting.
Machine learning & AI
Artificial intelligence researchers and data scientists at Facebook have created population density maps. What's so special is that they are more accurate and with higher resolution than any of their predecessors. Derrick ...
Energy & Green Tech
A trio of researchers at École Polytechnique Fédérale de Lausanne has found that solar panels could provide a lot more power for Switzerland than has been previously thought. In their paper published in Proceedings of ...
Automotive
Applying artificial intelligence to self-driving cars to smooth traffic, reduce fuel consumption, and improve air quality predictions may sound like the stuff of science fiction, but researchers at the Department of Energy's ...
Oct 29, 2018
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168
Consumer & Gadgets
A drone has set an endurance record that has made headlines. Specifically, The Engineer and other sites reported it was in the air for 25 days, 23 hours and 57 minutes. The UK-built pilotless drone took off from Arizona ...
Telecom
Five years ago, a team of researchers from the University of Texas at Austin boarded an $80-million yacht with the intent of trying to fool the vessel's navigation system and stealthily push it off course.
Mar 23, 2018
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33
Electronics & Semiconductors
(Tech Xplore)—Broadcom Limited, a wholly owned subsidiary of Avago Technologies, has announced the development of a new GPS chip, the BCM47755, which the company claims is far more accurate than the conventional chips now ...
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
