Where are geostationary satellites launched Why are geostationary satellites not useful for the studies of polar regions?
(1) Geostationary satellites are HEO satellites and are placed at 35780 km above the earth’s surface. (2) A geostationary satellite revolves in the equatorial plane of the earth, and thus, it can never fly above the polar regions. Hence, geostationary satellites are not useful for studies of polar regions.
Is a geostationary satellite is in polar orbit?
Complementing the geostationary satellites are two polar-orbiting satellites known as Advanced Television Infrared Observation Satellite (TIROS-N or ATN), constantly circling the Earth in an almost north-south orbit, passing close to both poles.
Why are there no satellites on poles?
Only a satellite passing directly over the poles will pass over the poles. GPS satellites pass in regular orbits that can be seen from the whole Earth. They don’t need to pass over the poles to do so. Launching into a polar orbit is more difficult than launching into an equatorial orbit, due to the motion of the Earth.
Why are geostationary satellites not useful for?
A geostationary satellite, is a satellite that revolves in the same direction the earth rotates. There cannot be geostationary satellite at the poles, because, it would have to be at rest, which cannot happen as it would get pulled by the earth’s gravity and eventually crash to the earth’s surface.
Why are geostationary satellites useful?
Geostationary communication satellites are useful because they are visible from a large area of the earth’s surface, extending 81° away in both latitude and longitude. They appear stationary in the sky, which eliminates the need for ground stations to have movable antennas.
What is geostationary and polar satellite?
Polar orbiting satellites provide imagery and atmospheric soundings of temperature and moisture data over the entire Earth. Geostationary satellites are in orbit 22,000 miles above the equator, spin at the same rate of the Earth and constantly focus on the same area.
What are the advantages and disadvantages of geostationary satellites?
➨It is ideal for broadcasting and multi-point distribution applications. ➨Ground station tracking is not required as it is continuously visible from earth all the time from fixed location. ➨Inter-satellite handoff is not needed. ➨Less number of satellites are needed to cover the entire earth.
What is meant by an artificial satellite How are the satellites classified based on their functions?
Depending on their functions , satellites are classified into following categories: (i) Weather satellite: These satellites are used to study and forecast weather conditions on the earth . (iii) Broadcast satellite : These satellites are used to telecast different television programs all over the world .