How to Determine Longitude
Turn on your GPS., Note the number of satellites that are being received.
Step-by-Step Guide
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Step 1: Turn on your GPS.
GPS receivers work by noting the position of synchronized communications satellites that broadcast the time. , The more satellites your GPS receiver picks up, the better job it can do of determining your position.
One satellite:
Your position can be anywhere on a circle on Earth’s surface.
Two satellites:
Your position can be either of two possible points on Earth’s surface.
Three satellites:
Your position, latitude and longitude, can be roughly determined by triangulation.
Four satellites:
Your position can be determined with greater accuracy than with only 3 satellites, because the fourth satellite constantly readjusts your GPS receiver’s internal clock.
In addition, the fourth satellite lets the GPS determine your altitude. -
Step 2: Note the number of satellites that are being received.
Detailed Guide
GPS receivers work by noting the position of synchronized communications satellites that broadcast the time. , The more satellites your GPS receiver picks up, the better job it can do of determining your position.
One satellite:
Your position can be anywhere on a circle on Earth’s surface.
Two satellites:
Your position can be either of two possible points on Earth’s surface.
Three satellites:
Your position, latitude and longitude, can be roughly determined by triangulation.
Four satellites:
Your position can be determined with greater accuracy than with only 3 satellites, because the fourth satellite constantly readjusts your GPS receiver’s internal clock.
In addition, the fourth satellite lets the GPS determine your altitude.
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Matthew Fox
A passionate writer with expertise in crafts topics. Loves sharing practical knowledge.
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