INS & IRS Flashcards
1
Q
Alignment time for INS & IRS
A
17 mins for INS
10 mins for IRS
2
Q
Errors of INS?
A
Bounded, UNbounded & Inherent
3
Q
How many accelerometers in INS & IRS
A
2 in INS 3 in IRS
4
Q
Why is dither motor used in IRS?
A
To prevent laser lock
5
Q
Sequences of INS?
A
OFF, Standby, Align, Nav, ATT
6
Q
IRS which gas is used?
A
Helium and Neon
7
Q
What errors does INS take?
A
rejects latitude errors
Accepts longitude errors
8
Q
Largest unbounded errors in INS?
A
Due to real wander
9
Q
What is Schuler Period?
A
84 mins
10
Q
Zero CI gives?
A
best range
