Session D4: Robust Navigation Using Alternative Navigation Sensors and Solutions

Extending ARAIM to Terrestrial Systems
Okuary Osechas, ZHAW; Birendra Kujur, Samer Khanafseh, Illinois Institute of Technology
Location: Johnson (First Floor)
Date/Time: Thursday, Sep. 11, 2:35 p.m.

Adapting the ARAIM methodology to suit terrestrial ranging systems requires adequate configuration of its input parameters. The configuration must be designed to preserve the integrity of the position solution, while, at the same time, supporting meaningful values of RNP. The analysis presents a rationale for setting certain parameters, from operational considerations. Some parameters cannot be set exactly, but the analysis proposes arguments for setting them within certain ranges of values. In particular the nominal biases and the probability of out-of-tolerance measurements. The resulting covariance analysis shows that it is reasonable to expect DME navigation to support RNP 1 at 18000 ft altitude, on a wide scale over Europe.