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Ries, L., Lestarquit, L., Armengou-Miret, E., Legrand, F., Vigneau, W., Bourga, C., Erhard, P. and Issler, J.L. (2002) A Software Simulation Tool for GNSS2 BOC Signals Analysis. Proceedings of the 15th International Technical Meeting of the Satellite Division of the Institute of Navigation ION GNSS 2002, Institute of Navigation, Portland, OR, 24-27 September 2002, 2225-2239.

has been cited by the following article:

• TITLE: Single Frequency WAAS Augmentation Observations (L1 vs. L5) on a Ground Based GPS L1 C/A Solution

  AUTHORS: Marc-Antoine Fortin, Jean-Christophe Guay, René Jr. Landry

  KEYWORDS: GPS L1, WAAS L1, WAAS L5, MOPS, Pseudorange Noise

  JOURNAL NAME: Positioning, Vol.5 No.3, August 15, 2014

  ABSTRACT: This paper presents observations on the WAAS L1 and L5 signals quality and their impact on the robustness of the navigation solution by quantifying the contributions of each broadcasted differential correction. This work is undertaken with the intent of defining performance benefits of L5 by dual frequency WAAS users and is to provide useful material for Minimum Operational Performance Standard (MOPS) development. In this perspective, a study of the WAAS signal characteristics is first carried out. The information gathered is then used to compare various GPS solutions in terms of frequency diversity, satellite diversity, pseudorange noise and different signal corrections and their impacts. These solutions are compared against a reference standalone GPS solution. All statistics are computed with respect to a post-processed Novatel Waypoint Real-Time Kinematics (RTK) GPS L1/L2 semi-codeless static solution, considered as the reference. A discussion on some simplifications with respect to specifications (i.e. MOPS) that could be considered by receiver manufacturers closes the paper. It is confirmed that the current WAAS navigation message definition is the same on both the L1 and L5 frequencies, the latter further being Manchester coded, thus avoiding data ambiguity. The +5 dB SNR on L5 has minor impacts in terms of reliability and continuous availability in the presented scenarios, but would become especially beneficial in hostile environments, despite a greater number of pulsed interferers. Another demonstration is that the WAAS message varies slightly from one WAAS satellite to another, even if corrections are generated centrally. Finally, it is observed that WAAS and GPS signals pseudorange noise are comparable on a “per frequency” basis.