The Global Positioning System, which was commonly known by the North American implementation called GPS; the GPS fails to provide an accurate Position, Navigation, and Time (PNT) signal over the Indian region. The positional accuracy of GPS is not up to the mark over the Indian region because the India is located near the equator. Moreover, the equatorial ionospheric grid point (IGP) of India d...

Tropospheric heterogeneity can lead to misinterpretation of differential radar interferometric results. A betweensite and between-epoch double-differencing algorithm for the derivation of tropospheric corrections to radar results using GPS measurements is proposed. In order to correct the radar result on a pixel-by-pixel basis, the GPS-derived corrections have to be interpolated. Using the GPS ...

Radar atmospheric decorrelation due to inhomogeneity of atmospheric refractivity is a critical limitation of satellite SAR interferometry (InSAR) in the high accuracy retrieving of geophysical parameters. With mm precision, a water vapor tracing technique based on GPS meteorology was widely employed to mitigate InSAR atmospheric errors. However, a reliable comparison of atmospheric delay betwee...

Background: Asthma treatment in Germany does not always comply with German treatment guidelines (AG) even though great importance is attached to medical guidelines worldwide. Suboptimal asthma management can lead to poor health outcomes. Barriers to guideline implementation and adherence must therefore be identified and analyzed. As 90% of asthma patients initially contact the German health sys...

This paper presents a framework to obtain pseudo lane-level positioning using low-cost GPS and driving event detection within the environment of vehicle-toinfrastructure (v2i) communication. In this context, pseudo means that lane level accuracy is achieved only under the assumption that v2i is available and there is no GPS outage. GPS errors can be categorized into common-mode errors and nonco...

Tidal induced displacement is one of the systematic errors that contribute to the scatter in the geodetic measurements derived from the GPS system. This paper focuses on ascertaining and reducing tidal induced errors due to ocean tide loading (OTL) at two GPS sites, namely CGSJ (Coast Guard Saint John, New Brunswick) and DRHS (Digby High School, Nova Scotia), established under the Princess of A...

The present invention provides a method and a device for providing superior differential GPS positioning data. The system includes a group of GPS receiving ground stations covering a wide area of the Earth’s surface. Unlike other differential GPS systems wherein the known position of each ground station is used to geometrically compute an ephemeris for each GPS satellite, the present system uti...