UNIVERSE
SATELLITESICY BODIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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GPS works through the standard mobile network. Mobiles receive signals from the masts, pinpointing the location.
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GPS is a government tracking service that follows and records the actions of individuals.
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GPS works by receiving signals from at least 3 satellites and through ‘trilateration’ determines the distance between each satellite and the receiver. There are 24 LEO satellites that orbit the earth twice each day and at least 4 of these are in line of site from any position on earth.
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GPS works by having a dedicated satellite to each receiver. Scrambled secure signals ensure that people are never unsure of their position on earth.
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Detailed explanation-1: -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-2: -You need four satellites because each data from one satellite put you in a sphere around the satellite. By computing the intersections you can narrow the possibilities to a single point. Three satellites intersection places you on two possible points. The last satellite give you the exact location.
Detailed explanation-3: -This creates six orbital planes which completely surround the Earth. These satellites send radio signals to Earth that contain information about the satellite. Using GPS ground-based receivers, these signals can be detected and used to determine the receivers’ positions (latitude, longitude, height.)