Multiconstellation GNSS/INS to Support LPV200 Approaches and Autolanding

Future evolution of the Global Navigation Satellite System (GNSS) scenario is expected to significantly improve the performance of GNSS based navigation systems, in particular accuracy and integrity. However, these systems will still be vulnerable to different threats like interference, jamming, or scintillation, which directly affect the continuity of service. One effective way to mitigate these threats is to integrate GNSS with an Inertial Navigation System (INS). Under the event of a failure a hybrid navigation system limits the degradation of the performance increasing the chances to complete the targeted procedure, especially for procedures that require relatively short time for completion. For this reason the usage of GNSS/INS integrated systems to support approach and landing operations is of particular interest. This paper studies the benefits of integrating future GNSS navigation systems with different grade of inertial measurement units (IMUs) to improve continuity for LPV200 approaches and autolanding (it is expected that future multiconstellation GNSS scenario may provide enough performance to support these procedures). The performance of the hybrid navigation system is evaluated under different failure scenarios and with respect to different grades of IMUs and compared with the equivalent performance provided by a standalone GNSS receiver.