How Things Work

Question 1

How GPS works

Answer 1

GPS satellites send signals which include their exact location and time when the signal was sent.

If your phone has the broadcast time and arrival time of the message and the signal speed, we can find the satellite distance.

Question 2

Which shape is formed at the points where 2 spheres overlap?

Answer 2

Circle

Question 3

If there is 1 satellite where our location can be

Answer 3

Anywhere on the sphere

Question 4

If we have 2 satellites, where our location can be

Answer 4

Anywhere on the circle created by 2 spheres intersection

Question 5

If we have 3 satellites, where can our location be?

Answer 5

Any of the 2 points at the intersection of the satellite

Question 6

Minimum how many satellites we need to pin point to the exact location?

Answer 6

4

Question 7

What are different ways to track the exact location of a phone

Answer 7

Wi-Fi, GPS, and cell towers

Place the phone in flight mode to reduce the tracking accuracy