@article {58, title = {Solving GPS gap, Coverage analysis of a superconstellation made up of GPS+EGNOS+S-QZSS}, volume = {IV}, year = {2008}, 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. The GPS gaps can be partially solved employing spacebased augmentations systems; in this paper we consider geostationary and geosynchronous constellations. A simulation software has been developed in MATLAB{\textregistered} environment in order to study the integration of existent and feasible constellations.

}, url = {http://mycoordinates.org/volume-iv-issue-6-june-2008/}, author = {ANGRISANO, A and PACIFICO, A and VULTAGGIO, M} }