INS/IRS Flashcards
1
Q
What is the difference between IRS and INS?
A
INS is stand-alone and IRS is integrated with the FMS
2
Q
What are corrective measures needed for?
A
Transport wander
Earth rate wander
Coriolis effect
Gravity effect
3
Q
What can standalone IRS calculate?
A
Latitude and longitude
Ground speed
True heading and true track
Vertical velocity
Wind direction and speed
Magnetic heading and track
4
Q
How long does a/c position alignment take in mid latitudes?
A
10-20mins and longer at higher latitudes
5
Q
What is the position error per hour for a standalone INS?
A
1-2nm per hour
6
Q
What do strap down system comprise of?
A
3 ring laser gyros and 3 accelerometers
