INS : Gyroscope errors : transport wander, apparent drift , coriolis effect ?

gkraju

can any one please explain me following errors of gyroscopes used in inertial navigation systems of aircraft :
a) what is transport wander , how actually it happens ?
b) what is apparent drift in gyroscope ?
c) what is coriolis effect and how it causes errors in gyroscopes ?

mugaliens

Not used anymore. RLGs (ring laser gyroscopes) have been the standard for the last 20 years.