@conference {57, title = {Augmentation satellites constellations, a simulation on EGNOS and QZSS for Europe coverage}, booktitle = {ENC 2008}, year = {2008}, month = {04/2008}, address = {Toulouse, France, 22-25 April}, abstract = {

The current GPS civil service provides suitable\ 
performance only in situations of good electromagnetic
visibility; the positioning becomes difficult in severely
signal degraded environments, e.g. mountainous or urban
areas, where a lot of GPS signals are blocked by
buildings or natural obstacles. In these situations GPS
could supply only inaccurate positioning or even could be
not able to provide position, owing to bad geometry or
lack of minimum number of visible SV. In this study
simulation software has been developed in MATLAB{\textregistered}
environment in order to study the integration of existent
and feasible constellations. Detailed coverage analysis of
a super-constellation made up of GPS-EGNOS-QZSS
will be presented based on existent GPS-EGNOS
satellites and hypothetical Shifted-QZSS constellation
over Europe. Good results were noticed by integration of
all the considered constellations for a wide service area,
even for middle values of mask angles.
}, author = {ANGRISANO, A and PACIFICO, A and VULTAGGIO, M} }