The effect of three different property levels of INS devices

navigation level

tactical level and commercial level

on GNSS/ INS deep-coupled receiver tracking loop is studied under different dynamic conditions for the INS devices selection in deep-coupled receiver.From this

the GNSS/INS deep-coupled receiver can reduce the critical bandwidth of lock-lose to a much greater extent

improve the lock-lose conditions of the traditional receiver and the carrier tracking precision.The critical bandwidthes of the navigation level

tactical level and commercial level deep-coupled receiver are 1～1.8

1.5～2.7Hz

and 2～4Hz

respectively.The carrier tracking errors are less than 19°

22°

and 27°

respectively.The velocity errors are 0.05～0.5

0.1～1.0m/s

and 0.2～2.0m/s

respectively.Above results provide theoretical basis for the INS devices selection in deep-coupled receiver.