Integrated Precipitable Water Vapor (IPWV) derived from GPS, water vapor radiometer WVR-1100 and RAdiosonde OBservation (RAOB) have been compared for the Cagliari site (Italy) on a seasonal and annual bases. The comparison analysis on estimating IPWV among the three independent techniques (GPS, WVR-110 and RAOB) has shown high accuracy equal to 0.136 cm with a bias of )0.049 cm throughout 1999....

Mobile location sensing applications (MLSAs) represent an emerging genre of applications that exploit Global Positioning System (GPS) technology and facilitate location-based services. The design of MLSAs must incorporate a tradeoff between information accuracy and energy efficiency because GPS technology is energy expensive and unaffordable for most MLSA platforms, which are battery-powered an...

Carrier phase-based GPS positioning is now an indispensable tool for a wide range of precise applications in navigation, surveying and geodesy. To address such a variety of applications, many implementations of precise GPS techniques have been developed. Almost all techniques involve 'relative' positioning, in which one GPS receiver/antenna's coordinates are determined with the aid of measureme...

The processing of the Global Positioning System (GPS) observables is regularly performed using some “a priori” standard meteorological values. These can be very unrealistic if only few observations are available since the actual atmospheric conditions over the geodetic network are neglected. This seems to be the case of randomly moving GPS receivers far from continuously observing reference sta...