GPS

Question 1

Global Positioning System (GPS

Answer 1

is a technology that has been available for about 20 years. GPS is a global Navigation Satellite System (GNSS). It uses a constellation between 24 and 32 earth orbit satellites that transmit precise radio signals which allow GPS receivers to determine their current location and time. GPS satellites circle the earth tice a day in a precise orbit and transmit signal information to earth. Atleast four a visible at any time.

Question 2

Features of GPS

Answer 2

• The ability to store positions and determine speed, direction, distance of travel, length of travel time and estimated time of arrival.
• Latitude, longitude and altitude details
• Map storage in the receivers memory
• The ability to trace your path across a map as you move

Question 3

What is trilateration

Answer 3

Trilateration is a simple mathematical principle that the GPS receivers job is based off.

Question 4

Strengths of GPS

Answer 4

• Makes it easy to navigate
• It works in all weather
• It works anywhere on earth

Question 5

Weaknesses of the GPS

Answer 5

• Sometimes the GPS may fail due to certain reasons and in that case you need to carry a backup map and directions.
• Most GPS systems only last 8-12 hours before needing a battery replacement or recharge.
• The position can be in error when the number of satellites is restricted.