@@ -131,8 +131,13 @@ The satellites of the GNSS system are equipped with **several atomic clocks**; h
# PART 5 : OUTREACH VIDEOS
-[GPS Satellites are the only one used to locate people?](1st video)
-[2nd video](2nd video)
-[It's easier to locate people in urban areas?](3rd video)
### If you want to think about this further, here is some information that may be useful
# PART 6 : TO GO FURTHER...
The **Allan variance** is a statistical method used to measure the stability of a frequency or time standard over time. It is a measure of the frequency stability of a clock or oscillator, and is commonly used in the field of time and frequency metrology.
