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      What is the Initial Alignment and How Does it Improve the Device's Performance?

      Posted by Luke Wilson on Aug 20, 2020 11:52:05 AM

      Purpose: To understand how the initial alignment improves the performance of the INS.

      Last Updated: June 2020


      What is it?

      During the Initial Alignment time, the INS estimates biases of the gyroscopes by measuring the current condition it is in (which should be static). The device can use these estimated biases in the Kalman Filter to help the device recognize the difference between when the unit is moving and when the gyroscopes are drifting. As a result, the initial alignment helps to improve the INS dynamic accuracy.

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      Topics: Bias, Increase, Alignment, Performance, Initial, Gyroscope, Gyro, Estimation

      How to Improve Position Accuracy in GNSS Denied Environments

      Posted by Luke Wilson on Aug 20, 2020 11:13:22 AM

      Purpose: To explain what INS features improve position error in GNSS denied environments.

      Last Updated: June 2020

      When using the Inertial Navigation System (INS), position error accumulation is always a concern. One way a user can limit this error is by enabling the “Tunnel Guide” feature (only available for fixed-axle land vehicle).  When enabled, it allows the INS to reduce its accumulated errors during extended GNSS outages. Use this feature when external aiding data is unavailable. To do so, go to the “Correction options window of the “Options” tab and enable “Tunnel guide” as shown below.

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      Topics: GPS Denied Navigation, INS, Error, Position, Accuracy, Increase, ZUPT, Outage

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