T. Benefits, . Multi-constellation, I. Gnss-augmentations, D. Alcantarilla, A. Porras et al., Alcatel Alenia Space), Institute Of Navigation, GNSS, 19 th international Technical Meeting of the Satellite Division, pp.26-29, 2006.

B. Bastide, D. Roturier, O. Julien, C. Macabiau, E. Rebeyrol et al., Civil Aviation Galileo E5 Receivers Architecture Frédéric, pp.12-13, 2006.

F. Bastide, E. Chatre, C. Macabiau, I. Gps, G. J. Betz et al., Impact of NeQuick Correction Model to Positioning and Timing Accuracy using the Instantaneous Pseudo Range Error of Single Frequency Absolute Positioning Receivers, B. Belabbas, S. Schlueter, M.Z. Sadeque, Deutsches Zentrum f¨ur Luft-und Raumfahrt (DLR), 2001.

D. S. Coco, C. Coker, S. R. Dahlke, I. , and J. R. Clynch, Naval Postgraduate School, IEEE transactions on aerospace and electronic systems, vol.27, issue.6, pp.24-28, 1991.

A. Ducasse, C. Mailhes, and F. Castanié, Estimation de fréquences : panorama des méthodes paramétriques, frequency estimation : survey of parametric methods, pp.149-162, 1998.

R. Hein and . Kaniuth, Andrea Pósfay and Thomas Pany Institute of Geodesy and Navigation, Proceedings of the Institute Of Navigation, National Technical Meeting, pp.24-26, 2005.

H. Euler, C. C. Goad, and B. Géodésique, On optimal filtering of GPS dual frequency observations without using orbit information, Bulletin G??od??sique, vol.37, issue.3, 1991.
DOI : 10.1007/BF00806368

. Galileo-open-service, Signal In Space, Interface Control Document, European GNSS Supervisory Authority, 2008.

. Iono-gps, software: determination of the ionospheric error using only L1 frequency GPS receiver, 1997.

C. Macabiau, O. Julien, and E. Chatre, Analysis of the Feasibility of Using GPS Carrier Phase Ambiguity Resolution Techniques for Precision Approaches, Use Of Multicorrelator Techniques for Interference Detection Proceedings of the Institue Of Navigation, National Technical Meeting, 1997.

S. Lawrence-marple and J. , Digital Spectral Analysis With Applications, Signal Processing Series, 1987.

G. Testing and . L5, Acquisition and Tracking Algorithms Using a Hardware Simulator, Lachapelle and M.E. Cannon Position, Location and Navigation (PLAN) Research References and Publications -159

. Shau-shiun, Aircraft Landing Using a Modernized Global Positioning System And The Wide Area Augmentation System, Shau- Shiun, 2003.

A. Steingaß, A. Lehner, F. Pérez-fontán, E. Kubista, M. J. Martín et al., A high resolution model for the aeronautical multipath navigation channel, PLANS 2004. Position Location and Navigation Symposium (IEEE Cat. No.04CH37556), 2004.
DOI : 10.1109/PLANS.2004.1309017

G. European, P. Programmes-update, and . Verhoef, European Commission, Directorate-General for Energy and Transport, 2008.

R. Weighted, . For-precision-approaches, T. Walter, and P. Enge, A generalized likelihood ratio approach to the detection and estimation of jumps in linear systems, Proceedings of the Institute Of Navigation, 1995.

G. Combined and . Receiver, Gerard Alcouffe (Thales) Christophe Ouzeau (ENAC), Navigation System Panel Each approach is divided into three different zones: high, mid and low altitudes. The ground reflection is thus characterized by a Markov state in each zone, Jean Pierre Arenthens (Thales) This Markov model is specific to one given airport (Graz) and must be changed for further studies, 2007.