Title :
Feasibility of wide-area subdecimeter navigation with GALILEO and Modernized GPS
Author :
Hernández-Pajares, Manuel ; Zomoza, J.M.J. ; Subirana, Jaume Sanz ; Colombo, Oscar L.
Author_Institution :
Res. Group of Astron. & Geomatics, Univ. Politecnica de Catalunya, Barcelona, Spain
Abstract :
Precise corrections with a three-dimensional voxel model of the ionosphere based on Global Navigation Satellite System (GNSS) data from a wide-area network of ground receivers can help resolve differential carrier-phase ambiguities over very long baselines of hundreds of kilometers in present two-frequency systems [Global Positioning System (GPS) and Global Orbiting Navigation Satellite System (GLONASS)] or in planned three-frequency systems (GALILEO, Modernized GPS). A study based on simulated three-frequency data from a modified GNSS signal generator indicates that all the phase ambiguities could be resolved successfully more than 90% of the time. This should be useful in surveying large areas with instruments that require very precise geolocation (e.g. radar or lidar altimetry, interferometric synthetic aperture radar, interferometric sonar, etc.).
Keywords :
Global Positioning System; radionavigation; 3D voxel model; GALILEO; GLONASS; GNSS data; Global Navigation Satellite System; Global Orbiting Navigation Satellite System; Global Positioning System; Modernized GPS; interferometric sonar; interferometric synthetic aperture radar; ionosphere; lidar altimetry; precise geolocation; radar altimetry; three-frequency systems; wide area surveying; wide-area ground receiver network; wide-area subdecimetre navigation; Altimetry; Global Positioning System; Instruments; Ionosphere; Laser radar; Satellite navigation systems; Signal generators; Signal resolution; Spaceborne radar; Synthetic aperture radar;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
DOI :
10.1109/TGRS.2003.817209
