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Analysis of the Effect of Time Delay on the Integrated GNSS_INS Navigation Systems精品
the International Journal Volume 7
on Marine Navigation Number 2
http://www.transnav.eu and Safety of Sea Transportation June 2013
DOI: 10.12716/1001.07.02.06
Analysis of the Effect of Time Delay on the Integrated
GNSS/INS Navigation Systems
C.K. Yang D.S. Shim
Chung‐Ang University, Seoul, Korea
ABSTRACT: The performance of tightly coupled GNSS/INS integration is known to be better than that of
loosely coupled GNSS/INS integration. However, if the time synchronization error occurs between the GNSS
receiver and INS(Inertial Navigation System), the situation reverses. The performance of loosely coupled
GNSS/INS integration and tightly coupled GNSS/INS integration is analyzed and compared due to time
synchronization error by computer simulation.
1 INTRODUCTION pseudorange information is used as Kalman filter
measurement.
GNSS(Global Navigation Satellite System) and To compare the performance of the two integration
INS(Inertial Navigation System) are widely used as systems, it is analytically studied how the time delay
standalone navigation systems, respectively. The between GNSS and INS has effect on the Kalman filter
integration of GNSS and INS not only leads to high innovation for each integration method. Then based
accuracy of vehicleʹs position, velocity, and attitude, on the analysis results, computer simulations are
but also provides position error bound. To maximize performed to check how each integratio
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