The usage of satellites in the 1960's differs greatly from the 1970's and 1990's. As of 1965, 100 satellites were placed in orbit each year. In the 1970's satellite usage expanded from the usage in the 60's. Scientists created new and more effective satellite instruments. Computers and miniature electronic technology in satellite design and construction was used. Many nations along with private businesses began to purchase and operate satellites. In the 1990's satellites became more popular and more necessary. By the early 90's more than 20 countries owned and operated their own satellites, and 2,000 satellites were operating in orbit.
Satellites are put to a wide variety of uses. Applications range from scientific research to military reconnaissance. The first satellites were used to study the Earth's upper atmosphere and inner space. Today, scientific satellites study a far greater range of objects. The major application of artificial satellites has been to provide long-distance communication links. Telephone companies, cable television stations, newspapers, and magazines use communications satellites to transmit data to various parts of the globe. Meteorological satellites use highly sensitive instruments for modern weather forecasting. Navigation satellites use laser-beam signals to determine the exact location of a ship on Earth.
Therefore, Satellite technology developed in many different fields of interest. Satellites were developed to help scientists take a closer look at the moon, to help predict weather and to help the Navy navigate their submarines. The satellites that were used for different areas contained different things inside of them. They used different systems and ways of taking pictures. The materials that were used in the satellite played a major role in the information that they returned with.
.
.
A new use of geostationary satellites is GPS, which stands for Geographical Positioning System, is used for determining one's precise location and providing a highly accurate time reference almost anywhere on Earth.
