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      What is ZUPT and When Do I Use It?

      Posted by Luke Wilson on Aug 20, 2020 11:25:12 AM

      Purpose: To understand which cases ZUPT should be ON and which case ZUPT should be OFF.

      Last Updated: June 2020

      ZUPT - or Zero Update Position and Timing, is used to mitigate gyroscope bias drift and in turn mitigate heading drift in a GPS-Denied environment. It should be enabled when the user wants to reduce its accumulated orientation and position errors once a carrier object stops. If a completely motionless state is not achievable, then the user should disable the ZUPT option.

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      Topics: INS, Error, Position, ZUPT

      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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