Electronics & Semiconductors
Low earth orbit (LEO) satellites are being increasingly used for environmental monitoring of the earth, as well as for logistic purposes, such as the navigation of maritime vessels. The data transmitted from the satellite ...
Jun 24, 2022
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31
Engineering
Satellites equipped with remote sensing technology execute many critical national security missions, from detecting explosions to tracking sea ice, but until now it could take a team years to move from a concept to a deployable ...
Jun 8, 2022
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49
Telecom
The world's first mission to remove several small telecommunications satellites from orbit once they reach the end of their operational service is about to start building and testing its prototype spacecraft.
May 27, 2022
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15
Computer Sciences
Skoltech researchers have trained a neural model to determine the height of trees on satellite imagery to monitor the natural environment, infrastructure, and timber supply. Unlike prior solutions, the model presented in ...
May 20, 2022
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24
Automotive
Today's connected cars are dynamic, updateable devices—and, because they can be updated, they are well equipped to become tomorrow's cars. ESA is working with European carmakers to ensure that connected vehicles harness ...
May 9, 2022
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5
Telecom
Though satellite internet has existed for years, the competition is about to rapidly intensify, with companies planning to launch thousands of their own systems into low Earth orbit.
Apr 7, 2022
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118
Robotics
Innovative airborne radars could soon be used to measure snow depth in New Zealand's alpine areas, helping to predict avalanche risk and monitoring the impacts of climate change.
Feb 24, 2022
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22
Telecom
ESA's Izaña-1 laser ranging station in Tenerife, Spain, has recently undergone months of testing and commissioning, passing its final tests with flying colors. As it reached "station acceptance," it was handed over to ESA ...
Feb 16, 2022
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3
Computer Sciences
Fog and low stratus clouds over airports can create dangerous travel conditions that result in costly delays and disrupted travel plans.
Feb 7, 2022
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4
Telecom
Astronauts on board the International Space Station are connecting straight to Europe at light speed, thanks to the European Data Relay System.
Jan 17, 2022
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10
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
