UNIVERSE
SATELLITESICY BODIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Leo
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Navstar
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Iridium
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None of the above
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Detailed explanation-1: -The Global Positioning System (GPS) is a worldwide radio-navigation system formed from a constellation of 24 satellites and their ground stations. GPS uses these “man-made stars” as reference points to calculate positions accurate to a matter of meters.
Detailed explanation-2: -The spacing of satellites in their orbital planes are arranged such that a minimum of four satellites will be in view everywhere on and near the surface of the earth at any time.
Detailed explanation-3: -It takes four GPS satellites to calculate a precise location on the Earth using the Global Positioning System: three to determine a position on the Earth, and one to adjust for the error in the receiver’s clock.
Detailed explanation-4: -There are currently 24 to 32 satellites in the US GPS / NAVSTAR constellation (including satellites in operation and extras in case of failures).