GNSS Multipath Error Model for Aircraft Surface Navigation Based on Canonical Scenarios for Class F Airports

In this study, the GNSS multipath simulator for aircraft navigation on the airport surface from [1] is used to derive a multipath pseudo­range error model. First the principle of this deterministic­statistical multipath simulator is reminded. A numerical validation of the electromagnetic multipath prediction is made by establishing the channel transfer function and comparing it to the one obtained with an electromagnetic software, FEKO, using the Method of Moments. To illustrate the outputs of such simulator, a comparison to measurements performed at ENAC is given. Then, after reminding the multipath pseudo­range error model that was established in [2], a multipath pseudo­range error model is adapted to ICAO code F airport layouts [3]. This model is based on the identification of canonical scenarios representing the taxi operation phase. The power spectral density of the multipath pseudo­range errors is over­bounded by a first order Gauss­Markov spectral density. An example of application for the taxi on stand taxilane sub­phase is proposed. In this example, the over­bounding distribution fits quite well the power spectral density of the estimated multipath pseudo­range errors. INTRODUCTION For surface operations, aircraft ground position and ground velocity can be estimated using a large variety of sensors, such as Global Navigation Satellite System, Inertial Navigation System, Wheel Speed Sensors and others. The sensor bringing global position information with a few meters of error is the GNSS, but measurements from this sensor are affected by signal blockage