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Variable inlet guide vanes (VIGV) are typically used in satellite compressors to allow for capacity variation. These vanes can control the airflow entering the compressor, thus adjusting the compressor's capacity.
The curved path that a satellite follows is called an orbit. This orbit is typically elliptical in shape and allows the satellite to remain in constant motion around the celestial body it is orbiting, such as the Earth.
Gravity is the force that allows satellites to orbit the Earth. The gravitational pull between the Earth and the satellite causes the satellite to continuously fall towards the Earth while moving forward at a speed that keeps it in orbit.
A satellite stays in orbit due to a balance between its forward speed and the gravitational pull of the Earth. The satellite's speed allows it to constantly fall towards Earth, but its forward motion keeps it moving horizontally enough to avoid collision. This results in a stable orbit around the planet.
A satellite is in geostationary orbit when it orbits the Earth at the same speed and direction as the Earth's rotation. This allows the satellite to appear stationary from the surface of the Earth. Measurements of its position and velocity can confirm that it is in geostationary orbit.
A satellite stays in orbit due to a balance between its forward motion and the gravitational pull of the Earth. The velocity of the satellite allows it to continuously fall towards the Earth but also keeps missing it, causing it to remain in orbit. If there were no gravitational pull, the satellite would fly off into space.