The polar orbit so that it can measure cold and hot points around the entire earth :)
Polar Orbit
From a polar orbit, a satellite can observe over time anypoint on the globe from directly above it.
From the question, I'm guessing that when the questioner reads the term "polar orbit", he's picturing the satellite doing a little tiny circle in the sky over the North Pole. This is not an accurate understanding of the term. Remember that the center of the orbit of an artificial satellite has to be at the center of the earth. A 'polar orbit' is an orbit that covers both poles. If you picture the globe of the earth, the satellite's orbit is a circle standing up, with the satellite traveling up and down, passing over both poles in each complete revolution of the earth. As the earth rotates, every point on earth passes under the orbit, and sooner or later, every point on earth will be visible from the satellite.
a polar satellite is a satellite that travels around the earth passing over both poles with every orbit. they are use for mapping and spying
A satellite in Geosychronous Earth Orbit (GEO) orbits the Earth in the same time period that the Earth spins, so the satellite appears to be stationary over one spot above the Earth's equator. It's always looking down at the same area of the Earth. A satellite in a polar orbit will pass quickly over any one spot on Earth and keep going. It can't watch the same area for a long period. Depending on the altitude of the orbit, it may take days or weeks to pass over the same area again. However, polar orbits are typically much lower, permitting a much higher resolution image. This is very important for photo imagery, but not so much for weather.
A polar orbit or high-inclination orbit. In polar orbit, the satellite passes over the world from pole to pole, while the Earth spins beneath it. Each orbit would cover a different area.
It's lifted into space by a big rocket.
it is too cold and there is no power lines to get signal
Primarily photo or radar reconnaissance.
A satellite in a polar orbit orbits from north to south. As the earth turns, it passes over all the surface area of the earth. Therefore, polar orbits are ideal for detecting things on the planet's surface.
it carries the the satellite over the earths north and south poles