The ionosphere contributes the largest and most unpredictable error to single frequency GPS users’ range measurements. The goal of a Space-Based Augmentation System (SBAS) in mitigating these ionospheric errors is two-fold. First, the SBAS broadcasts error corrections to its users for improved positioning accuracy. Moreover, the SBAS provides a service that GPS alone cannot: ensuring position e...

This paper presents a web tool for the unsupervised retrieval of Earth’s surface deformation from Synthetic Aperture Radar (SAR) satellite data. The system is based on the implementation of the Differential SAR Interferometry (DInSAR) algorithm referred to as Parallel Small BAseline Subset (P-SBAS) approach, within the Grid Processing on Demand (G-POD) environment that is a part of the ESA’s Ge...

Abstract Satellite Based Augmentation System (SBAS) provides the corrections and integrity information to users, but as its signal format is opened public Global Navigation (GNSS) spoofing technology becomes more realistic, feasible cheaper. It's foreseeable that there will be risks of threats against SBAS in future. authentication a system-level solution by adding special markers signals so re...

In this paper, we present the results achieved in the long-term subsidence project in Norway, ESA AO-1104, which have made use of ERS SAR data. By applying the differential SAR interferometry technique referred to as Small Baseline Subset (SBAS) approach to a test area covering the city of Oslo, Norway, we show significant subsidence in several areas of more than 5 mm/year in the time period 19...

The promise of smart buildings (SBs) is a safer more productive environment for users and a more operationally efficient building for owners. The automation of building function is highly dependent on sensing devices and Smart Building Applications(SBAs), which are often only evaluated in situ post deployment, making re-development costly. In this paper we explore our experiences developing a S...

Due to the continuously changing environment of service-based applications (SBAs), ability adapt environmental and contextual changes has become a crucial characteristic such applications. Providing SBAs with this is complex task, usually prepared in an unsystematic way interwoven application logic. As result, developing maintaining adaptive costly hardly repeatable process. The objective paper...

BACKGROUND In South Sudan, birth deliveries attended by unskilled birth attendants put the mothers and their newborns at increased risk of perinatal morbidity and mortality. The aim of this study was to identify factors associated with delivery by unskilled birth attendants or by unassisted delivery. DESIGN We examined data for 2,767 (weighted total) women aged 15-49 years who delivered at ho...

InSAR has been developed to estimate the temporal change on the surface of Earth by combining multiple SAR images acquired over the same area at different times. In the last two decades, in addition to conventional InSAR, numerous multiple acquisition InSAR techniques have been introduced, including permanent scatterer (PS) (Ferretti et al., 2001) and small baseline subset (SBAS) (Berardino et ...