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SIGNAV Internship Opportunities

Context :

Global Navigation Satellite Systems (GNSS) are currently in a very dynamic phase: USA (GPS) and Russia (GLONASS) are modernizing their systems; Europe (Galileo) and China (BeiDou) are developing new ones. In this context, civil aviation is currently developing the standards for future airborne GNSS receivers that will take advantage of these systems.

As part of the evolution of airborne GNSS receivers, civil aviation investigates means to strengthen the resistance of GNSS receivers to potential new threats such as GNSS signal spoofing and ionospheric scintillation.

  • GNSS signal spoofing represents the case in which fake GNSS signals are transmitted from emitters resulting in the possibility for a GNSS receiver to use these signals, instead of the authentic signals to compute it position
  • Ionospheric scintillation is a propagation phenomenon taking place in the ionospheric layer that can modify the transmitted signal in such a way that the GNSS receiver might not be able to process the signal appropriately (loss of lock, cycle slips, etc…)

The objective of the two internships are to investigate both threats.

Internship 1: Investigation of the Effect of Spoofing on Civil Aviation GNSS Receivers

The objective of this internship will be to use the Texas Spoofing Test Battery (TEXBAT) scenarios to generate signals reproducing spoofing attacks and analyse the answer of civil aviation receiver to these scenarios. Depending on the progress of the internship, the investigation of spoofing indicators can be also investigated. The phases of the internship will be:

  • Phase 1: State-of-the-art on GNSS signal processing (acquisition, tracking) and on the different types of GNSS signal spoofing
  • Phase 2: Use of the TEXBAT files to control a GPS signal simulator
  • Phase 3: Investigation of a GPS receiver to the simulated spoofing attacks
  • Phase 4: Writing of the manuscript

Internship 2: Investigation of the Effect of Scintillation on Civil Aviation GNSS Receivers

Based on existing recorded signals during scintillation events, the objective of this internship will be to build a GNSS receiver capable of processing these signals, to analyze the behaviour of the receiver during the scintillation phases and to make recommendations on how civil aviation should handle such events. The phases of the internship will be:

  • Phase 1: State-of-the-art on GNSS signal processing (acquisition, tracking) and on scintillation and scintillation models
  • Phase 2: Getting familiar with the current ENAC Matlab GPS receiver and adapting it to the processing of the adapted data
  • Phase 3: Analysis of the behavior of the receiver during scintillation events via a series of metrics to be defined
  • Phase 4: Writing of the manuscript

Location and Date:

Location: Ecole Nationale de l’Aviation Civile, Toulouse, France

Preferred starting date : Between early February and early March 2018

Duration: 6 months

To Apply:

Send your resume + cover letter to Olivier Julien (ojulien[at]recherche.enac.fr)

Last updated: 4 weeks 5 days ago