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Quick Answer. Pointing a dish requires knowing the azimuth and elevation coordinates for the location, aiming the dish towards those coordinates, and then gradually adjusting with a signal meter to find the strongest signal. Properly aiming a satellite dish is a very precise task that requires the assistance of a dish pointer tool.
For some low earth orbit satellites the ground station antenna systems are designed to be able to track the satellite in azimuth and elevation. This is typically achieved by automatically tracking the satellite as it moves across the sky. This is normally achieved by taking a signal level output from the receiver.