Satellite: 5 thousand in space

Nearly five thousand satellites (orbits) circulating in space around the Earth. Although they are only effective in just two thousand.
According to the latest UN estimates, there are 4,635 satellites in orbit. Of these, 1,738 satellites are effective, all the restless or debris.
According to the data from August last year, 788 commercially active satellites, 461 government jobs, 360 military requirements and 129 were used for civilian work. And the top 803 are owned by the United States, the second position is in China, 204, then Russia has 142 satellites.
On October 4, 1957, the Sputnik One sent by the Soviet Union opened in front of the world, a new chapter of surprise. However, on February 28, 1959, the first satellite discovery was sent to one orbit - the United States
On 1 April 1960, the United States sent the tires-one orbit. It is the first satellite capable of weather monitoring. Scientists analyzed the pictures of tires-like and analyzed the process of cloud acceleration and how to predict the storm.
Landsat is the special satellite name for geological structure, land monitoring and analysis. The United States launched Landset-1 on 23 July 1972. From the identification of the crater fault line to the forest - the size of the farmland, the city map - everything is possible by the satellite in this series.
The Global Positioning System (GPS) is a network of specialized satellite networks, called Navstra. It is being operated by the US Air Force. The first satellite block-1 was sent to orbit on 22 February 1978.
The world's first contact satellite echo-1 was sent on orbit in the 1960's on 1 st of 1960. NASA And three years later, the first communication satellite named Geistationary Orbits was named SinCom-2. Bangabandhu One is a Geostationary Communication Satellite of Modern Technology, which will turn 36,000 kilometers away from the Earth orbits.