The day GPS was fully operational – level 3
The Global Positioning System (GPS) is a satellite system that provides information about one’s location on the Earth.
GPS was developed by the United States, and although it was originally intended for the US Army, GPS is now used by people all over the world.
GPS consists of a network of 24 satellites orbiting the Earth, which transmit signals to GPS receivers such as smartphones on the ground.
GPS satellites travel at a height of 20,000 km above the Earth and orbit the Earth twice a day.
The GPS system became fully operational on July 17, 1995.
The full deployment of the GPS system revolutionized navigation and positioning, and has had a significant impact on the transportation industry.
How has GPS changed society since its full deployment in 1995?
LEARN 3000 WORDS with DAYS IN LEVELS
Days in Levels is designed to teach you 3000 words in English. Please follow the instructions
How to improve your English with Days in Levels:
- Do the test at Test Languages.
- Go to your level. Go to Level 1 if you know 1-1000 words. Go to Level 2 if you know 1000-2000 words. Go to Level 3 if you know 2000-3000 words.
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- Read one previous article too and check if you remember all new words.
- Listen to the new article and read the text at the same time.
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