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Orbits

Year: 2016
As in previous years, the most used orbit type is l##. In 2016, ##% of the ### spacecraft launched or deployed around the Earth were inserted into ##. The effective range of this type of...
Year: 2015
According to the Union of Concerned Scientists, a total of ## satellites were still operational at the end of 2015. These satellites are mostly located in low Earth orbit (LEO) between 200 and 2,000 kilometers (124–1,242 miles) of altitude. LEO is home to ## active satellites, or ##% of the...
Year: 2015
This is a description of the Space Foundation methodology for classifying different satellite orbits with Earth at their focus.
Year: 2014
According to the Union of Concerned Scientists, a total of ## satellites were active at the end of 2014. These satellites are mostly located in low Earth orbit (LEO) between 200 and 2,000 kilometers (124–1,242 miles) of altitude. LEO is home to ## active satellites, or ##% of the total. This...
Year: 2013
There were ## active satellites in orbit at the end of 2013, all performing various missions depending on their configuration and orbit. Of all active satellites, ## (approximately ##% of the total) were in geosynchronous equatorial orbit (GEO), an orbit 35,790 kilometers (22,240 miles) above the...
Year: 2011
Country: United States
The closer proximity to the Earth also greatly reduces signal delay from a LEO satellite to ground stations and allows for smaller receivers on the ground. While minimizing signal delay is not vital for DTH services or corporate networks, it makes the orbit ideal for voice traffic being sent...
Year: 2010
Country: United States
The closer proximity to the Earth also greatly reduces signal delay from a LEO satellite to ground stations and allows for smaller receivers on the ground. While these attributes are beneficial, these lower orbits are challenging in that these satellites constantly move in and out of view of...
Year: 2009
Satellites provide a perspective of the Earth that cannot be matched by ground-based technology. In the early days of the Space Age, satellites served little purpose beyond demonstrating that they were in orbit. Decades of experience and technological advancement have yielded sophisticated craft...
Year: 2005
As geostationary (GSO) satellites remain in an essentially fixed position relative to the ground at all times, they can communicate with fixed ground stations continually. Medium Earth orbit (MEO) and low Earth orbit (LEO) satellites appear to “fly by” overhead and have a shorter communication...

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