Cleartalking.com



Welcome to Cleartalking Q&A, where you can ask questions about telecom products and services related to any country, Mobile Devices and internet enabled smart devices. Receive answers from other members of the community.
Tips & Tricks
0 like 0 dislike
87 views
asked in Satellite Telecom (TV & Internet) by qamar079

2 Answers

0 like 0 dislike
The major reasons why you need a fourth satellite is for timing corrections. If you know the exact position and speed of the satellites, trilateration will give you indeed 2 points, but one will usually be impossible or with an impossible speed. But a gps receiver uses the time it takes to receive a sattelite signal to determine the distance to that satellite. Even minor errors in the time of your gps receiver will cause huge errors and therefore a large uncertainty band when you have only three satellites.
answered by divina009
0 like 0 dislike
For your exact Location and time measuring.
answered by cyber-teacher

Related questions

0 like 0 dislike
1 answer
0 like 0 dislike
1 answer
1 like 0 dislike
1 answer
1 like 0 dislike
1 answer
1 like 0 dislike
2 answers
0 like 0 dislike
1 answer


...